{
 "instance": {
  "mlic-20200930.htm": {
   "axisCustom": 5,
   "axisStandard": 39,
   "contextCount": 1075,
   "dts": {
    "calculationLink": {
     "local": [
      "mlic-20200930_cal.xml"
     ]
    },
    "definitionLink": {
     "local": [
      "mlic-20200930_def.xml"
     ],
     "remote": [
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-eedm-def-2020-01-31.xml",
      "http://xbrl.fasb.org/srt/2020/elts/srt-eedm1-def-2020-01-31.xml"
     ]
    },
    "inline": {
     "local": [
      "mlic-20200930.htm"
     ]
    },
    "labelLink": {
     "local": [
      "mlic-20200930_lab.xml"
     ],
     "remote": [
      "https://xbrl.sec.gov/dei/2020/dei-doc-2020-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-doc-2020-01-31.xml"
     ]
    },
    "presentationLink": {
     "local": [
      "mlic-20200930_pre.xml"
     ]
    },
    "referenceLink": {
     "remote": [
      "https://xbrl.sec.gov/dei/2020/dei-ref-2020-01-31.xml",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-ref-2020-01-31.xml"
     ]
    },
    "schema": {
     "local": [
      "mlic-20200930.xsd"
     ],
     "remote": [
      "http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd",
      "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xl-2003-12-31.xsd",
      "http://www.xbrl.org/2003/xlink-2003-12-31.xsd",
      "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd",
      "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd",
      "http://www.xbrl.org/2005/xbrldt-2005.xsd",
      "http://www.xbrl.org/2006/ref-2006-02-27.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd",
      "http://xbrl.fasb.org/srt/2020/elts/srt-roles-2020-01-31.xsd",
      "https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd",
      "https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd",
      "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd",
      "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd",
      "http://xbrl.fasb.org/us-gaap/2020/elts/us-parts-codification-2020-01-31.xsd"
     ]
    }
   },
   "elementCount": 934,
   "entityCount": 1,
   "hidden": {
    "http://fasb.org/us-gaap/2020-01-31": 3,
    "http://xbrl.sec.gov/dei/2020-01-31": 5,
    "total": 8
   },
   "keyCustom": 94,
   "keyStandard": 499,
   "memberCustom": 75,
   "memberStandard": 119,
   "nsprefix": "mlic",
   "nsuri": "http://www.metlife.com/20200930",
   "report": {
    "R1": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "document",
     "isDefault": "true",
     "longName": "0001001 - Document - Document and Entity Information",
     "role": "http://www.metlife.com/role/DocumentandEntityInformation",
     "shortName": "Document and Entity Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "dei:DocumentType",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R10": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2115104 - Disclosure - Closed Block",
     "role": "http://www.metlife.com/role/ClosedBlock",
     "shortName": "Closed Block",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R100": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2495471 - Disclosure - Related Party Transactions (Reinsurance Transactions - Narrative) (Details)",
     "role": "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails",
     "shortName": "Related Party Transactions (Reinsurance Transactions - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i9d240bac916443a793d7a02359883170_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R11": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2120105 - Disclosure - Investments",
     "role": "http://www.metlife.com/role/Investments",
     "shortName": "Investments",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R12": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
      "reportCount": 1,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2155106 - Disclosure - Derivatives",
     "role": "http://www.metlife.com/role/Derivatives",
     "shortName": "Derivatives",
     "subGroupType": "",
     "uniqueAnchor": null
    },
    "R13": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2166107 - Disclosure - Fair Value",
     "role": "http://www.metlife.com/role/FairValue",
     "shortName": "Fair Value",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueDisclosuresTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R14": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2174108 - Disclosure - Equity",
     "role": "http://www.metlife.com/role/Equity",
     "shortName": "Equity",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityNoteDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R15": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2178109 - Disclosure - Other Revenues and Other Expenses",
     "role": "http://www.metlife.com/role/OtherRevenuesandOtherExpenses",
     "shortName": "Other Revenues and Other Expenses",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherIncomeAndOtherExpenseDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R16": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2182110 - Disclosure - Employee Benefit Plans",
     "role": "http://www.metlife.com/role/EmployeeBenefitPlans",
     "shortName": "Employee Benefit Plans",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R17": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2185111 - Disclosure - Income Tax",
     "role": "http://www.metlife.com/role/IncomeTax",
     "shortName": "Income Tax",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeTaxDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R18": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsContingenciesAndGuaranteesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2187112 - Disclosure - Contingencies, Commitments and Guarantees",
     "role": "http://www.metlife.com/role/ContingenciesCommitmentsandGuarantees",
     "shortName": "Contingencies, Commitments and Guarantees",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CommitmentsContingenciesAndGuaranteesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R19": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2190113 - Disclosure - Related Party Transactions",
     "role": "http://www.metlife.com/role/RelatedPartyTransactions",
     "shortName": "Related Party Transactions",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R2": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AvailableForSaleSecuritiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1001002 - Statement - Consolidated Balance Sheets (Unaudited)",
     "role": "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
     "shortName": "Consolidated Balance Sheets (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:OtherLimitedPartnershipInterests",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R20": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:UseOfEstimates",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2202201 - Disclosure - Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)",
     "role": "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies",
     "shortName": "Business, Basis of Presentation and Summary of Significant Accounting Policies (Policies)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:UseOfEstimates",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R21": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2306301 - Disclosure - Segment Information (Tables)",
     "role": "http://www.metlife.com/role/SegmentInformationTables",
     "shortName": "Segment Information (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R22": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2311302 - Disclosure - Insurance (Tables)",
     "role": "http://www.metlife.com/role/InsuranceTables",
     "shortName": "Insurance (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R23": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfClosedBlockAssetsAndLiabilities",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2316303 - Disclosure - Closed Block (Tables)",
     "role": "http://www.metlife.com/role/ClosedBlockTables",
     "shortName": "Closed Block (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfClosedBlockAssetsAndLiabilities",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R24": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2321304 - Disclosure - Investments (Tables)",
     "role": "http://www.metlife.com/role/InvestmentsTables",
     "shortName": "Investments (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R25": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2356305 - Disclosure - Derivatives (Tables)",
     "role": "http://www.metlife.com/role/DerivativesTables",
     "shortName": "Derivatives (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R26": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2367306 - Disclosure - Fair Value (Tables)",
     "role": "http://www.metlife.com/role/FairValueTables",
     "shortName": "Fair Value (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R27": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2375307 - Disclosure - Equity (Tables)",
     "role": "http://www.metlife.com/role/EquityTables",
     "shortName": "Equity (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R28": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2379308 - Disclosure - Other Revenues and Other Expenses (Tables)",
     "role": "http://www.metlife.com/role/OtherRevenuesandOtherExpensesTables",
     "shortName": "Other Revenues and Other Expenses (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DisaggregationOfRevenueTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R29": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2383309 - Disclosure - Employee Benefit Plans (Tables)",
     "role": "http://www.metlife.com/role/EmployeeBenefitPlansTables",
     "shortName": "Employee Benefit Plans (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R3": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1002003 - Statement - Consolidated Balance Sheets (Unaudited) (Parenthetical)",
     "role": "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
     "shortName": "Consolidated Balance Sheets (Unaudited) (Parenthetical)",
     "subGroupType": "parenthetical",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentInLease",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R30": {
     "firstAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EffectsOfReinsuranceTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2391310 - Disclosure - Related Party Transactions (Tables)",
     "role": "http://www.metlife.com/role/RelatedPartyTransactionsTables",
     "shortName": "Related Party Transactions (Tables)",
     "subGroupType": "tables",
     "uniqueAnchor": {
      "ancestors": [
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EffectsOfReinsuranceTableTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R31": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RetainedEarningsAccumulatedDeficit",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2403401 - Disclosure - Business, Basis of Presentation and Summary of Significant Accounting Policies (New Accounting Pronouncements) (Details)",
     "role": "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails",
     "shortName": "Business, Basis of Presentation and Summary of Significant Accounting Policies (New Accounting Pronouncements) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i50b2c5202e124b6f840b4119e97595d3_I20200101",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:RetainedEarningsAccumulatedDeficit",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R32": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfReportableSegments",
      "reportCount": 1,
      "unitRef": "segment",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2404402 - Disclosure - Business, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)",
     "role": "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails",
     "shortName": "Business, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R33": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PremiumsEarnedNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2407403 - Disclosure - Segment Information (Earnings) (Details)",
     "role": "http://www.metlife.com/role/SegmentInformationEarningsDetails",
     "shortName": "Segment Information (Earnings) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:PolicyholderBenefitsAndClaimsIncurredNetAndPolicyholderDividends",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R34": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2408404 - Disclosure - Segment Information (Total Assets) (Details)",
     "role": "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails",
     "shortName": "Segment Information (Total Assets) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "if505a8c4419145c6a54596267574aff6_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R35": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NumberOfReportableSegments",
      "reportCount": 1,
      "unitRef": "segment",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2409405 - Disclosure - Segment Information (Narrative) (Details)",
     "role": "http://www.metlife.com/role/SegmentInformationNarrativeDetails",
     "shortName": "Segment Information (Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R36": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i750f7d2a32094a449116deafac07614e_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetAmountAtRiskByProductAndGuaranteeGeneralAccountValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2412406 - Disclosure - Insurance (Guarantees Related to Annuity Contracts) (Details)",
     "role": "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
     "shortName": "Insurance (Guarantees Related to Annuity Contracts) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i750f7d2a32094a449116deafac07614e_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetAmountAtRiskByProductAndGuaranteeGeneralAccountValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R37": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ic8b8f5c759e44d5993fe37d58fcf5aff_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetAmountAtRiskByProductAndGuaranteeGeneralAndSeparateAccountValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2413407 - Disclosure - Insurance (Guarantees Related to Universal and Variable Life Contracts) (Details)",
     "role": "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails",
     "shortName": "Insurance (Guarantees Related to Universal and Variable Life Contracts) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ic8b8f5c759e44d5993fe37d58fcf5aff_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetAmountAtRiskByProductAndGuaranteeGeneralAndSeparateAccountValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R38": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2414408 - Disclosure - Insurance (Rollforward of Unpaid Claims) (Details)",
     "role": "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails",
     "shortName": "Insurance (Rollforward of Unpaid Claims) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R39": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfClosedBlockAssetsAndLiabilities",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockLiabilitiesFuturePolicyBenefitsAndPolicyholderAccountBalances",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2417409 - Disclosure - Closed Block (Liabilities and Assets) (Details)",
     "role": "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails",
     "shortName": "Closed Block (Liabilities and Assets) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfClosedBlockAssetsAndLiabilities",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockLiabilitiesFuturePolicyBenefitsAndPolicyholderAccountBalances",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R4": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PremiumsEarnedNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1003004 - Statement - Consolidated Statements of Operations and Comprehensive Income (Unaudited)",
     "role": "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
     "shortName": "Consolidated Statements of Operations and Comprehensive Income (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:PolicyholderDividends",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R40": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockLiabilitiesPolicyholderDividendObligation",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2418410 - Disclosure - Closed Block (Policyholder Dividend Obligation) (Details)",
     "role": "http://www.metlife.com/role/ClosedBlockPolicyholderDividendObligationDetails",
     "shortName": "Closed Block (Policyholder Dividend Obligation) (Details)",
     "subGroupType": "policies",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ClosedBlockDividendObligationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R41": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ClosedBlockOperationsNetResultsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockOperationsPremiums",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2419411 - Disclosure - Closed Block (Revenues and Expenses) (Details)",
     "role": "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails",
     "shortName": "Closed Block (Revenues and Expenses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ClosedBlockOperationsNetResultsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ClosedBlockOperationsPremiums",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R42": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2422412 - Disclosure - Investments (Fixed Maturity Securities Available-For-Sale by Sector) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
     "shortName": "Investments (Fixed Maturity Securities Available-For-Sale by Sector) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AvailableForSaleSecuritiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ib2f36315de1a4fc49b81608f7afc16df_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R43": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2423413 - Disclosure - Investments (Maturities of Fixed Maturity Securities) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails",
     "shortName": "Investments (Maturities of Fixed Maturity Securities) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R44": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2424414 - Disclosure - Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available For Sale) Details (Details)",
     "role": "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
     "shortName": "Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available For Sale) Details (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R45": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i85b871d97d934b7caabbc02129f2fe0e_I20200630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2425415 - Disclosure - Investments (Allowance for Credit Loss for Fixed Maturity Securities AFS by Sector) Details (Details)",
     "role": "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
     "shortName": "Investments (Allowance for Credit Loss for Fixed Maturity Securities AFS by Sector) Details (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R46": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NotesReceivableGross",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2426416 - Disclosure - Investments (Mortgage Loans by Portfolio Segment) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
     "shortName": "Investments (Mortgage Loans by Portfolio Segment) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivableAllowanceForCreditLosses",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R47": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AllowanceForLoanAndLeaseLossesRealEstate",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2427417 - Disclosure - Investments (ACL Rollforward by Portfolio Segment) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
     "shortName": "Investments (ACL Rollforward by Portfolio Segment) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i6db16a53ed65423d95090d497a6627e0_I20181231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:AllowanceForLoanAndLeaseLossesRealEstate",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R48": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NotesReceivableGross",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2428418 - Disclosure - Investments (Credit Quality of Commercial Mortgage Loans) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
     "shortName": "Investments (Credit Quality of Commercial Mortgage Loans) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FinancingReceivableCreditQualityIndicatorsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ice50d047ba114c6d83f40093fd816d6b_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R49": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NotesReceivableGross",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2429419 - Disclosure - Investments (Credit Quality of Agricultural and Residential Mortgage Loans) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
     "shortName": "Investments (Credit Quality of Agricultural and Residential Mortgage Loans) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:FinancingReceivableCreditQualityIndicatorsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:MortgageLoansInProcessOfForeclosureAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R5": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i6db16a53ed65423d95090d497a6627e0_I20181231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1004005 - Statement - Consolidated Statements of Equity (Unaudited)",
     "role": "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
     "shortName": "Consolidated Statements of Equity (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ice41f86ca9bc4a9192ad172944734d80_D20190101-20190630",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:AdjustmentsToAdditionalPaidInCapitalOther",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R50": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivableRecordedInvestmentPastDue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2430420 - Disclosure - Investments (Past Due and Interest Accrual Status of Mortgage Loans) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
     "shortName": "Investments (Past Due and Interest Accrual Status of Mortgage Loans) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivableRecordedInvestmentPastDue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R51": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2431421 - Disclosure - Investments (Purchased Investments with Credit Deterioration) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails",
     "shortName": "Investments (Purchased Investments with Credit Deterioration) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "mlic:PurchasedFinancialAssetswithCreditDeteriorationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i325cafe086284e3896eb0b90424a28be_D20200101-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R52": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RentalProperties",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2432422 - Disclosure - Investments (Real Estate and Real Estate Joint Ventures) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
     "shortName": "Investments (Real Estate and Real Estate Joint Ventures) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:RentalProperties",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R53": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:UnrealizedGainLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecuritiesThatWereTemporarilyImpaired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2433423 - Disclosure - Investments (Net Unrealized Investment Gains Losses) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails",
     "shortName": "Investments (Net Unrealized Investment Gains Losses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:UnrealizedGainLossOnInvestmentsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecuritiesThatWereTemporarilyImpaired",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R54": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAttributableToCompany",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2434424 - Disclosure - Investments (Changes in Net Unrealized Investment Gains Losses) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails",
     "shortName": "Investments (Changes in Net Unrealized Investment Gains Losses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAttributableToCompany",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R55": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2435425 - Disclosure - Investments (Securities Lending and Repurchase Agreements) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
     "shortName": "Investments (Securities Lending and Repurchase Agreements) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:SecuritiesLendingReinvestmentPortfolioEstimatedFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R56": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfSecuritiesFinancingTransactionsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2436426 - Disclosure - Investments (Securities Lending and Repurchase Agreements Remaining Tenor) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails",
     "shortName": "Investments (Securities Lending and Repurchase Agreements Remaining Tenor) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "icb32e496123946268eba4ae2cd552d4e_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R57": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DepositAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2437427 - Disclosure - Investments (Invested Assets on Deposit, Held In Trust and Pledged as Collateral) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositHeldInTrustandPledgedasCollateralDetails",
     "shortName": "Investments (Invested Assets on Deposit, Held In Trust and Pledged as Collateral) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DepositAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R58": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2438428 - Disclosure - Investments (Consolidated Variable Interest Entities) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
     "shortName": "Investments (Consolidated Variable Interest Entities) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfVariableInterestEntitiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ib5f40c0d77084d65b00f2f391ba0de0d_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R59": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:Assets",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2439429 - Disclosure - Investments (Unconsolidated Variable Interest Entities) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
     "shortName": "Investments (Unconsolidated Variable Interest Entities) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:ScheduleOfVariableInterestEntitiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:TaxCreditsGuaranteedByThirdPartiesAmountThatReducesMaximumExposureToLossRelatedToOtherInvestedAssets",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R6": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "statement",
     "isDefault": "false",
     "longName": "1005006 - Statement - Consolidated Statements of Cash Flows (Unaudited)",
     "role": "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited",
     "shortName": "Consolidated Statements of Cash Flows (Unaudited)",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R60": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:NetInvestmentIncome",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2440430 - Disclosure - Investments (Net Investment Income) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
     "shortName": "Investments (Net Investment Income) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:InvestmentIncomeTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:InvestmentIncomeInvestmentExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R61": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:GainLossOnInvestmentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GainLossOnSaleOfDebtInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2441431 - Disclosure - Investments (Components of Net Investment Gains Losses) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
     "shortName": "Investments (Components of Net Investment Gains Losses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:GainLossOnInvestmentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GainLossOnSaleOfDebtInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R62": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "if70f6180cd604fdbbf988fa4d170b868_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromSaleOfInsuranceInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2442432 - Disclosure - Investments (Sales or Disposals and Impairments of Fixed Maturity AFS) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails",
     "shortName": "Investments (Sales or Disposals and Impairments of Fixed Maturity AFS) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "if70f6180cd604fdbbf988fa4d170b868_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ProceedsFromSaleOfInsuranceInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R63": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OtherInvestments",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2443433 - Disclosure - Investments (Recurring Related Party Investments) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
     "shortName": "Investments (Recurring Related Party Investments) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:AssetsTransferredFromAffiliatesEstimatedFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R64": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2444434 - Disclosure - Investments (Evaluation of Available-For-Sale Securities for OTTI and Evaluating Temporarily Impaired AFS Securities - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
     "shortName": "Investments (Evaluation of Available-For-Sale Securities for OTTI and Evaluating Temporarily Impaired AFS Securities - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R65": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2445435 - Disclosure - Investments (Mortgage Loans - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
     "shortName": "Investments (Mortgage Loans - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R66": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RealEstateAcquiredThroughForeclosure",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2446436 - Disclosure - Investments (Real Estate and Real Estate Joint Ventures - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails",
     "shortName": "Investments (Real Estate and Real Estate Joint Ventures - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:RealEstateAcquiredThroughForeclosure",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R67": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DescriptionOfLessorLeasingArrangementsCapitalLeases",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2447437 - Disclosure - Investments (Leveraged and Direct Financing Leases - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails",
     "shortName": "Investments (Leveraged and Direct Financing Leases - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DescriptionOfLessorLeasingArrangementsCapitalLeases",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R68": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2448438 - Disclosure - Investments (Cash Equivalents - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsCashEquivalentsNarrativeDetails",
     "shortName": "Investments (Cash Equivalents - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-8",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CashEquivalentsAtCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R69": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueConcentrationOfRiskInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2449439 - Disclosure - Investments (Concentrations of Credit Risk - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsConcentrationsofCreditRiskNarrativeDetails",
     "shortName": "Investments (Concentrations of Credit Risk - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueConcentrationOfRiskInvestments",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R7": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2101101 - Disclosure - Business, Basis of Presentation and Summary of Significant Accounting Policies",
     "role": "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPolicies",
     "shortName": "Business, Basis of Presentation and Summary of Significant Accounting Policies",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R70": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FederalHomeLoanBankStock",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2450440 - Disclosure - Investments (Invested Assets on Deposits and Pledged as Collateral - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositsandPledgedasCollateralNarrativeDetails",
     "shortName": "Investments (Invested Assets on Deposits and Pledged as Collateral - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FederalHomeLoanBankStock",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R71": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i344bfababb3c44e19cfab2e6860b0e3c_D20190401-20190630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:Proceedsfromsecuritizationofloanheldforinvestmentcarryingvalue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2451441 - Disclosure - Investments (Unconsolidated Variable Interest Entities - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails",
     "shortName": "Investments (Unconsolidated Variable Interest Entities - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i344bfababb3c44e19cfab2e6860b0e3c_D20190401-20190630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:Proceedsfromsecuritizationofloanheldforinvestmentcarryingvalue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R72": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:IncomeLossFromEquityMethodInvestments",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2452442 - Disclosure - Investments (Net Investment Income - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeNarrativeDetails",
     "shortName": "Investments (Net Investment Income - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": null
    },
    "R73": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ForeignCurrencyTransactionGainLossRealized",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2453443 - Disclosure - Investments (Net Investment Gains Losses - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsNetInvestmentGainsLossesNarrativeDetails",
     "shortName": "Investments (Net Investment Gains Losses - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:ForeignCurrencyTransactionGainLossRealized",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R74": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CostsAndExpensesRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2454444 - Disclosure - Investments (Related Party Investment Transactions - Narrative) (Details)",
     "role": "http://www.metlife.com/role/InvestmentsRelatedPartyInvestmentTransactionsNarrativeDetails",
     "shortName": "Investments (Related Party Investment Transactions - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CostsAndExpensesRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R75": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeFairValueOfDerivativeAsset",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2457445 - Disclosure - Derivatives (Primary Risks) (Details)",
     "role": "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
     "shortName": "Derivatives (Primary Risks) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:DerivativeNotionalAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R76": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2458446 - Disclosure - Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss) (Details)",
     "role": "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
     "shortName": "Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:DerivativeGainLossOnDerivativeNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R77": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i96baf79c318443c9980ee0d37fa85266_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:DebtInstrumentsCarryingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2459447 - Disclosure - Derivatives (Fair Value Hedges) (Details)",
     "role": "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
     "shortName": "Derivatives (Fair Value Hedges) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i96baf79c318443c9980ee0d37fa85266_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:DebtInstrumentsCarryingAmount",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R78": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DisclosureOfCreditDerivativesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CreditRiskDerivativesAtFairValueNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2460448 - Disclosure - Derivatives (Credit Derivatives) (Details)",
     "role": "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
     "shortName": "Derivatives (Credit Derivatives) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DisclosureOfCreditDerivativesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:CreditRiskDerivativesAtFairValueNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R79": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:OffsettingLiabilitiesTableTextBlock",
       "us-gaap:OffsettingAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:DerivativeAssetFairValueGrossAssetExcludingAccruals",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2461449 - Disclosure - Derivatives (Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral) (Details)",
     "role": "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
     "shortName": "Derivatives (Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:OffsettingLiabilitiesTableTextBlock",
       "us-gaap:OffsettingAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:DerivativeAssetFairValueGrossAssetExcludingAccruals",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R8": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2105102 - Disclosure - Segment Information",
     "role": "http://www.metlife.com/role/SegmentInformation",
     "shortName": "Segment Information",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:SegmentReportingDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R80": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:OffsettingLiabilitiesTableTextBlock",
       "us-gaap:OffsettingAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeCollateralRightToReclaimCash",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2462450 - Disclosure - Derivatives (Credit Risk on Freestanding Derivatives) (Details)",
     "role": "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails",
     "shortName": "Derivatives (Credit Risk on Freestanding Derivatives) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "us-gaap:OffsettingLiabilitiesTableTextBlock",
       "us-gaap:OffsettingAssetsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "0",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeCollateralRightToReclaimCash",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R81": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2463451 - Disclosure - Derivatives (Embedded Derivatives) (Details)",
     "role": "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
     "shortName": "Derivatives (Embedded Derivatives) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativeInstrumentsTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i7b779c6f053040fda04035255e3a674c_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R82": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeFairValueOfDerivativeAsset",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2465453 - Disclosure - Derivatives (Narrative) (Details)",
     "role": "http://www.metlife.com/role/DerivativesNarrativeDetails",
     "shortName": "Derivatives (Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:CreditRiskDerivativeLiabilitiesAtFairValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R83": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:AvailableForSaleSecuritiesTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2468454 - Disclosure - Fair Value (Recurring Fair Value Measurements) (Details)",
     "role": "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
     "shortName": "Fair Value (Recurring Fair Value Measurements) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iac8d80ee89aa439194988dda5fd3b364_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R84": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ic7832062f0224dff8874be8ada5946f0_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeAssetLiabilityNetMeasurementInput",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2469455 - Disclosure - Fair Value (Quantitative Information) (Details)",
     "role": "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
     "shortName": "Fair Value (Quantitative Information) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ic7832062f0224dff8874be8ada5946f0_I20200930",
      "decimals": "INF",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DerivativeAssetLiabilityNetMeasurementInput",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R85": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i9c2639597206420a955d2c3a31f5a351_I20200630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2470456 - Disclosure - Fair Value (Unobservable Input Reconciliation) (Details)",
     "role": "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
     "shortName": "Fair Value (Unobservable Input Reconciliation) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i9c2639597206420a955d2c3a31f5a351_I20200630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R86": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "if1542c0525bf4fe697a075bb900df4b3_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:InvestmentinMortgageLoansonRealEstateFaceAmountofMortgages",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2471457 - Disclosure - Fair Value (Fair Value Option for Residential Mortgage Loans) (Details)",
     "role": "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails",
     "shortName": "Fair Value (Fair Value Option for Residential Mortgage Loans) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "ix:continuation",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "if1542c0525bf4fe697a075bb900df4b3_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "mlic:InvestmentinMortgageLoansonRealEstateFaceAmountofMortgages",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R87": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:MortgageLoansOnRealEstateCommercialAndConsumerNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2472458 - Disclosure - Fair Value (Nonrecurring Fair Value Measurements) (Details)",
     "role": "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
     "shortName": "Fair Value (Nonrecurring Fair Value Measurements) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueAssetsMeasuredOnNonrecurringBasisTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ifc271c1a89a44d4faa851ff350cfa4a5_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:AssetsFairValueAdjustment",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R88": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LoansInsurancePolicy",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2473459 - Disclosure - Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details)",
     "role": "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
     "shortName": "Fair Value (Financial Instruments Carried at Other Than Fair Value) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:FairValueByBalanceSheetGroupingTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i2d289dbff38c43bd988468625861a234_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "mlic:FairValueMortgageLoansNetNotOnRecurringBasis",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R89": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i85b871d97d934b7caabbc02129f2fe0e_I20200630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2476460 - Disclosure - Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details)",
     "role": "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
     "shortName": "Equity (Components of Accumulated Other Comprehensive Income (Loss)) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i85b871d97d934b7caabbc02129f2fe0e_I20200630",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R9": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InsuranceDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2110103 - Disclosure - Insurance",
     "role": "http://www.metlife.com/role/Insurance",
     "shortName": "Insurance",
     "subGroupType": "",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i520779690fb741dcb65ffc695944d868_D20200101-20200930",
      "decimals": null,
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:InsuranceDisclosureTextBlock",
      "reportCount": 1,
      "unique": true,
      "unitRef": null,
      "xsiNil": "false"
     }
    },
    "R90": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GainLossOnInvestments",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2477461 - Disclosure - Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details)",
     "role": "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
     "shortName": "Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ie48fb93857f8438cb1cdcd27a9088a2c_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:ProfitLoss",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R91": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2480462 - Disclosure - Other Revenues (Details)",
     "role": "http://www.metlife.com/role/OtherRevenuesDetails",
     "shortName": "Other Revenues (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:DisaggregationOfRevenueTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R92": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GeneralAndAdministrativeExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2481463 - Disclosure - Other Expenses (Other Expenses) (Details)",
     "role": "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails",
     "shortName": "Other Expenses (Other Expenses) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GeneralAndAdministrativeExpense",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R93": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i40765d2f8dd34be9a52c18b7bda3f61b_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanServiceCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2484464 - Disclosure - Employee Benefit Plans (Net Periodic Benefit Costs) (Details)",
     "role": "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
     "shortName": "Employee Benefit Plans (Net Periodic Benefit Costs) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:ScheduleOfNetBenefitCostsTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i40765d2f8dd34be9a52c18b7bda3f61b_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:DefinedBenefitPlanServiceCost",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R94": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2486465 - Disclosure - Income Tax (Narrative) (Details)",
     "role": "http://www.metlife.com/role/IncomeTaxNarrativeDetails",
     "shortName": "Income Tax (Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "2",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:EffectiveIncomeTaxRateContinuingOperations",
      "reportCount": 1,
      "unique": true,
      "unitRef": "number",
      "xsiNil": "false"
     }
    },
    "R95": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ida4320e07cc146079d1a4664d618987e_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LossContingencyRangeOfPossibleLossPortionNotAccrued",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2488466 - Disclosure - Contingencies, Commitments and Guarantees (Contingencies - Narrative) (Details)",
     "role": "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails",
     "shortName": "Contingencies, Commitments and Guarantees (Contingencies - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "ida4320e07cc146079d1a4664d618987e_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:LossContingencyRangeOfPossibleLossPortionNotAccrued",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R96": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GuaranteeObligationsCurrentCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2489467 - Disclosure - Contingencies, Commitments and Guarantees (Commitments and Guarantees - Narrative) (Details)",
     "role": "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
     "shortName": "Contingencies, Commitments and Guarantees (Commitments and Guarantees - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:GuaranteeObligationsCurrentCarryingValue",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R97": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:OperatingExpenses",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2492468 - Disclosure - Related Party Transactions (Service Agreements - Narrative) (Details)",
     "role": "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails",
     "shortName": "Related Party Transactions (Service Agreements - Narrative) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "div",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "iebc0d802a2c8454b85f066fffb8ed64d_I20191231",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:RelatedPartyTransactionDueFromToRelatedParty",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R98": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock",
       "ix:continuation",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "idc9092274ee84c0e8010e4227eb7a6fc_D20200701-20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PremiumsEarnedNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2493469 - Disclosure - Related Party Transactions (Effects of Affiliated Reinsurance on Statements of Operations) (Details)",
     "role": "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
     "shortName": "Related Party Transactions (Effects of Affiliated Reinsurance on Statements of Operations) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "us-gaap:EffectsOfReinsuranceTableTextBlock",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i80a2670712dc4e75b30d140ffd5b5462_D20200701-20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:AssumedPremiumsEarned",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    },
    "R99": {
     "firstAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i12b658dbb20b4cec9df139c8d9927f54_I20200930",
      "decimals": "-6",
      "first": true,
      "lang": "en-US",
      "name": "us-gaap:PremiumsAndOtherReceivablesNet",
      "reportCount": 1,
      "unitRef": "usd",
      "xsiNil": "false"
     },
     "groupType": "disclosure",
     "isDefault": "false",
     "longName": "2494470 - Disclosure - Related Party Transactions (Effects of Affiliated Reinsurance on Balance Sheets) (Details)",
     "role": "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
     "shortName": "Related Party Transactions (Effects of Affiliated Reinsurance on Balance Sheets) (Details)",
     "subGroupType": "details",
     "uniqueAnchor": {
      "ancestors": [
       "span",
       "td",
       "tr",
       "table",
       "div",
       "ix:continuation",
       "ix:continuation",
       "body",
       "html"
      ],
      "baseRef": "mlic-20200930.htm",
      "contextRef": "i199835d8bc3c4566be4034b337b7a601_I20200930",
      "decimals": "-6",
      "lang": "en-US",
      "name": "us-gaap:PremiumsAndOtherReceivablesNet",
      "reportCount": 1,
      "unique": true,
      "unitRef": "usd",
      "xsiNil": "false"
     }
    }
   },
   "segmentCount": 224,
   "tag": {
    "country_US": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "UNITED STATES",
        "terseLabel": "U.S."
       }
      }
     },
     "localname": "US",
     "nsuri": "http://xbrl.sec.gov/country/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "dei_AmendmentFlag": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.",
        "label": "Amendment Flag",
        "terseLabel": "Amendment Flag"
       }
      }
     },
     "localname": "AmendmentFlag",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_CityAreaCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Area code of city",
        "label": "City Area Code",
        "terseLabel": "City Area Code"
       }
      }
     },
     "localname": "CityAreaCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_CoverAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cover page.",
        "label": "Cover [Abstract]",
        "terseLabel": "Cover [Abstract]"
       }
      }
     },
     "localname": "CoverAbstract",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "dei_CurrentFiscalYearEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "End date of current fiscal year in the format --MM-DD.",
        "label": "Current Fiscal Year End Date",
        "terseLabel": "Current Fiscal Year End Date"
       }
      }
     },
     "localname": "CurrentFiscalYearEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "gMonthDayItemType"
    },
    "dei_DocumentFiscalPeriodFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fiscal period values are FY, Q1, Q2, and Q3.  1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.",
        "label": "Document Fiscal Period Focus",
        "terseLabel": "Document Fiscal Period Focus"
       }
      }
     },
     "localname": "DocumentFiscalPeriodFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "fiscalPeriodItemType"
    },
    "dei_DocumentFiscalYearFocus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.",
        "label": "Document Fiscal Year Focus",
        "terseLabel": "Document Fiscal Year Focus"
       }
      }
     },
     "localname": "DocumentFiscalYearFocus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "gYearItemType"
    },
    "dei_DocumentPeriodEndDate": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented.  If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.",
        "label": "Document Period End Date",
        "terseLabel": "Document Period End Date"
       }
      }
     },
     "localname": "DocumentPeriodEndDate",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "dateItemType"
    },
    "dei_DocumentQuarterlyReport": {
     "auth_ref": [
      "r827"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as an quarterly report.",
        "label": "Document Quarterly Report",
        "terseLabel": "Document Quarterly Report"
       }
      }
     },
     "localname": "DocumentQuarterlyReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentTransitionReport": {
     "auth_ref": [
      "r828"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true only for a form used as a transition report.",
        "label": "Document Transition Report",
        "terseLabel": "Document Transition Report"
       }
      }
     },
     "localname": "DocumentTransitionReport",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_DocumentType": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.",
        "label": "Document Type",
        "terseLabel": "Document Type"
       }
      }
     },
     "localname": "DocumentType",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "submissionTypeItemType"
    },
    "dei_EntityAddressAddressLine1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Address Line 1 such as Attn, Building Name, Street Name",
        "label": "Entity Address, Address Line One",
        "terseLabel": "Entity Address, Address Line One"
       }
      }
     },
     "localname": "EntityAddressAddressLine1",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressCityOrTown": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the City or Town",
        "label": "Entity Address, City or Town",
        "terseLabel": "Entity Address, City or Town"
       }
      }
     },
     "localname": "EntityAddressCityOrTown",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressPostalZipCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Code for the postal or zip code",
        "label": "Entity Address, Postal Zip Code",
        "terseLabel": "Entity Address, Postal Zip Code"
       }
      }
     },
     "localname": "EntityAddressPostalZipCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityAddressStateOrProvince": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Name of the state or province.",
        "label": "Entity Address, State or Province",
        "terseLabel": "Entity Address, State or Province"
       }
      }
     },
     "localname": "EntityAddressStateOrProvince",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "stateOrProvinceItemType"
    },
    "dei_EntityCentralIndexKey": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.",
        "label": "Entity Central Index Key",
        "terseLabel": "Entity Central Index Key"
       }
      }
     },
     "localname": "EntityCentralIndexKey",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "centralIndexKeyItemType"
    },
    "dei_EntityCommonStockSharesOutstanding": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.",
        "label": "Entity Common Stock, Shares Outstanding",
        "terseLabel": "Entity Common Stock, Shares Outstanding"
       }
      }
     },
     "localname": "EntityCommonStockSharesOutstanding",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "sharesItemType"
    },
    "dei_EntityCurrentReportingStatus": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Current Reporting Status",
        "terseLabel": "Entity Current Reporting Status"
       }
      }
     },
     "localname": "EntityCurrentReportingStatus",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityEmergingGrowthCompany": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate if registrant meets the emerging growth company criteria.",
        "label": "Entity Emerging Growth Company",
        "terseLabel": "Entity Emerging Growth Company"
       }
      }
     },
     "localname": "EntityEmergingGrowthCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityFileNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.",
        "label": "Entity File Number",
        "terseLabel": "Entity File Number"
       }
      }
     },
     "localname": "EntityFileNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "fileNumberItemType"
    },
    "dei_EntityFilerCategory": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.",
        "label": "Entity Filer Category",
        "terseLabel": "Entity Filer Category"
       }
      }
     },
     "localname": "EntityFilerCategory",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "filerCategoryItemType"
    },
    "dei_EntityIncorporationStateCountryCode": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Two-character EDGAR code representing the state or country of incorporation.",
        "label": "Entity Incorporation, State or Country Code",
        "terseLabel": "Entity Incorporation, State or Country Code"
       }
      }
     },
     "localname": "EntityIncorporationStateCountryCode",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "edgarStateCountryItemType"
    },
    "dei_EntityInteractiveDataCurrent": {
     "auth_ref": [
      "r830"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).",
        "label": "Entity Interactive Data Current",
        "terseLabel": "Entity Interactive Data Current"
       }
      }
     },
     "localname": "EntityInteractiveDataCurrent",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "yesNoItemType"
    },
    "dei_EntityListingParValuePerShare": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The par value per share of security quoted in same currency as Trading currency. Example: '0.01'.",
        "label": "Entity Listing, Par Value Per Share",
        "terseLabel": "Entity Listing, Par Value Per Share"
       }
      }
     },
     "localname": "EntityListingParValuePerShare",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "perShareItemType"
    },
    "dei_EntityRegistrantName": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.",
        "label": "Entity Registrant Name",
        "terseLabel": "Entity Registrant Name"
       }
      }
     },
     "localname": "EntityRegistrantName",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "dei_EntityShellCompany": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.",
        "label": "Entity Shell Company",
        "terseLabel": "Entity Shell Company"
       }
      }
     },
     "localname": "EntityShellCompany",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntitySmallBusiness": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).",
        "label": "Entity Small Business",
        "terseLabel": "Entity Small Business"
       }
      }
     },
     "localname": "EntitySmallBusiness",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "booleanItemType"
    },
    "dei_EntityTaxIdentificationNumber": {
     "auth_ref": [
      "r829"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.",
        "label": "Entity Tax Identification Number",
        "terseLabel": "Entity Tax Identification Number"
       }
      }
     },
     "localname": "EntityTaxIdentificationNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "employerIdItemType"
    },
    "dei_LocalPhoneNumber": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Local phone number for entity.",
        "label": "Local Phone Number",
        "terseLabel": "Local Phone Number"
       }
      }
     },
     "localname": "LocalPhoneNumber",
     "nsuri": "http://xbrl.sec.gov/dei/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DocumentandEntityInformation"
     ],
     "xbrltype": "normalizedStringItemType"
    },
    "mlic_ASU201712AccountingGuidanceDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Domain] for ASU 2017-12 Accounting Pronouncement [Axis]",
        "label": "ASU 2017-12 Accounting Guidance [Domain]",
        "terseLabel": "ASU 2017-12 Accounting Guidance [Domain]"
       }
      }
     },
     "localname": "ASU201712AccountingGuidanceDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ASU201712AccountingPronouncementAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "ASU 2017-12 Accounting Pronouncement [Axis]",
        "label": "ASU 2017-12 Accounting Pronouncement [Axis]",
        "terseLabel": "ASU 2017-12 Accounting Pronouncement [Axis]"
       }
      }
     },
     "localname": "ASU201712AccountingPronouncementAxis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_AaaAaMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aaa Aa A Member.",
        "label": "Aaa Aa [Member]",
        "verboseLabel": "Aaa/Aa/A"
       }
      }
     },
     "localname": "AaaAaMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_AccumulatedOtherComprehensiveIncomeLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated other comprehensive income (loss) related to the effective portion of derivatives designated in cash flow hedges.",
        "label": "Accumulated Other Comprehensive Income Loss",
        "verboseLabel": "Accumulated Other Comprehensive Income Loss"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AdministrativeservicesonlycontractsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Administrative services-only contracts [Member]",
        "label": "Administrative services-only contracts [Member]",
        "terseLabel": "Administrative services-only contracts"
       }
      }
     },
     "localname": "AdministrativeservicesonlycontractsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_AmericanLifeInsuranceCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "American Life Insurance Company [Member]",
        "label": "American Life Insurance Company [Member]",
        "terseLabel": "American Life Insurance Company"
       }
      }
     },
     "localname": "AmericanLifeInsuranceCompanyMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_AssetsOnDepositHeldInTrustAndPledgedAsCollateral": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.",
        "label": "Assets On Deposit Held In Trust And Pledged As Collateral",
        "verboseLabel": "Total invested assets on deposit and pledged as collateral"
       }
      }
     },
     "localname": "AssetsOnDepositHeldInTrustAndPledgedAsCollateral",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositHeldInTrustandPledgedasCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AssetsTransferredFromAffiliatesEstimatedFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Assets Transferred From Affiliates Estimated Fair Value",
        "label": "Assets Transferred From Affiliates Estimated Fair Value",
        "terseLabel": "Assets Transferred From Affiliates Estimated Fair Value"
       }
      }
     },
     "localname": "AssetsTransferredFromAffiliatesEstimatedFairValue",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AssumedGuaranteedMinimumBenefitMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Assumed Guaranteed Minimum Benefit",
        "label": "Assumed Guaranteed Minimum Benefit [Member]",
        "terseLabel": "Assumed guaranteed minimum benefits"
       }
      }
     },
     "localname": "AssumedGuaranteedMinimumBenefitMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_AssumedInsuranceCommissionsAndFees": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Universal life and investment-type product policy fees assumed from other insurers as a result of reinsurance arrangements.",
        "label": "Assumed Insurance Commissions And Fees",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "AssumedInsuranceCommissionsAndFees",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AssumedInterestCreditedToPolicyholdersAccountBalances": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest credited to policyholder account balances that have been assumed from other insurers as a result of reinsurance agreements.",
        "label": "Assumed Interest Credited To Policyholders Account Balances",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "AssumedInterestCreditedToPolicyholdersAccountBalances",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AssumedOperatingExpenses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services assumed from other insurers as a result of reinsurance arrangements.",
        "label": "Assumed Operating Expenses",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "AssumedOperatingExpenses",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_AssumedReinsuranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "All or part of a ceding company's insurance or reinsurance on a risk or exposure that is accepted.",
        "label": "Assumed Reinsurance [Member]",
        "terseLabel": "Assumed Reinsurance [Member]"
       }
      }
     },
     "localname": "AssumedReinsuranceMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_BMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "B.",
        "label": "B [Member]",
        "terseLabel": "B [Member]"
       }
      }
     },
     "localname": "BMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_BaaMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Baa.",
        "label": "Baa [Member]",
        "terseLabel": "Baa [Member]"
       }
      }
     },
     "localname": "BaaMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_CashPaidInConnectionWithFreestandingDerivatives": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 12.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow provided by derivative instruments during the period, which are classified as investing activities, including both hedging and non-hedging instruments.",
        "label": "Cash Paid In Connection With Freestanding Derivatives",
        "negatedLabel": "Cash paid in connection with freestanding derivatives"
       }
      }
     },
     "localname": "CashPaidInConnectionWithFreestandingDerivatives",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_Cashreceivedinconnectionwithfreestandingderivatives": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 11.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow provided by derivative instruments during the period, which are classified as investing activities, including both hedging and non-hedging instruments.",
        "label": "Cash received in connection with freestanding derivatives",
        "verboseLabel": "Cash received in connection with freestanding derivatives"
       }
      }
     },
     "localname": "Cashreceivedinconnectionwithfreestandingderivatives",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_CededInsuranceCommissionsAndFees": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Universal life and investment-type product policy fees ceded to other insurers as a result of reinsurance agreements.",
        "label": "Ceded Insurance Commissions And Fees",
        "negatedLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "CededInsuranceCommissionsAndFees",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_CededInterestCreditedToPolicyholdersAccountBalances": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest credited to policyholder account balances that have been ceded to other insurers as a result of reinsurance agreements.",
        "label": "Ceded Interest Credited To Policyholders Account Balances",
        "negatedLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "CededInterestCreditedToPolicyholdersAccountBalances",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_CededOperatingExpenses": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services ceded to other insurers as a result of reinsurance arrangements.",
        "label": "Ceded Operating Expenses",
        "verboseLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "CededOperatingExpenses",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_CededReinsuranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amounts passed on to another insurer (the reinsurer) that are all or part of the financial interests of insurance policies written by an insurer (the ceding insurer) or assumed by an insurer/reinsurer with the object of reducing the cedent's possible liability by sharing with the reinsurer the insurance liability, premiums, and losses from the reinsured business.",
        "label": "Ceded Reinsurance [Member]",
        "terseLabel": "Ceded Reinsurance [Member]"
       }
      }
     },
     "localname": "CededReinsuranceMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ChangeInEstimatedFairValueOfEquitySecurities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Change In Estimated Fair Value Of Equity Securities.",
        "label": "Change In Estimated Fair Value Of Equity Securities",
        "terseLabel": "Change In Estimated Fair Value Of Equity Securities"
       }
      }
     },
     "localname": "ChangeInEstimatedFairValueOfEquitySecurities",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangeInEstimatedFairValueOfOtherLimitedPartnershipInterestsAndRealEstateJointVentures": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures.",
        "label": "Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures",
        "terseLabel": "Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures"
       }
      }
     },
     "localname": "ChangeInEstimatedFairValueOfOtherLimitedPartnershipInterestsAndRealEstateJointVentures",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInEstimatedFairValueSubsequentToPurchaseForEquitySecurities": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Changes In Estimated Fair Value Subsequent To Purchase For Equity Securities Still Held As Of The End Of The Period Included In Net Income Gains (Losses).",
        "label": "Changes In Estimated Fair Value Subsequent To Purchase For Equity Securities",
        "terseLabel": "Changes In Estimated Fair Value Subsequent To Purchase For Equity Securities"
       }
      }
     },
     "localname": "ChangesInEstimatedFairValueSubsequentToPurchaseForEquitySecurities",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesExcludingPortionAttributableToNoncontrollingInterests": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) excluding portion attributable to noncontrolling interests.",
        "label": "Changes In Net Unrealized Investment Gains Losses Excluding Portion Attributable To Noncontrolling Interests",
        "verboseLabel": "Change in net unrealized investment gains (losses)"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesExcludingPortionAttributableToNoncontrollingInterests",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDacAndVoba": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) related to DAC and VOBA.",
        "label": "Changes In Net Unrealized Investment Gains Losses Related To Dac And Voba",
        "verboseLabel": "DAC, VOBA and DSI"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDacAndVoba",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDebtSecuritiesOnWhichNoncreditOttiLossesHaveBeenRecognized": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) on fixed maturity securities on which noncredit OTTI losses have been recognized.",
        "label": "Changes In Net Unrealized Investment Gains Losses Related To Debt Securities On Which Noncredit Otti Losses Have Been Recognized",
        "verboseLabel": "Fixed maturity securities AFS on which noncredit OTTI losses have been recognized"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDebtSecuritiesOnWhichNoncreditOttiLossesHaveBeenRecognized",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDeferredIncomeTaxBenefitExpenseRelatedToNonCreditOttiLossesRecognizedInOtherComprehensiveIncomeLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Changes in net unrealized investment gains (losses) related to deferred income tax benefit (expense) related to noncredit OTTI losses recognized in other comprehensive income (loss).",
        "label": "Changes In Net Unrealized Investment Gains (Losses) Related To Deferred Income Tax Benefit (Expense) Related To Non Credit Otti Losses Recognized In Other Comprehensive Income (Loss)",
        "verboseLabel": "Deferred income tax benefit (expense) related to noncredit OTTI losses recognized in AOCI"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDeferredIncomeTaxBenefitExpenseRelatedToNonCreditOttiLossesRecognizedInOtherComprehensiveIncomeLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToInsuranceLiabilityGainLossRecognition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) related to insurance liability gain (loss) recognition.",
        "label": "Changes In Net Unrealized Investment Gains Losses Related To Insurance Liability Gain Loss Recognition",
        "verboseLabel": "Future policy benefits"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToInsuranceLiabilityGainLossRecognition",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToPolicyholderDividendObligation": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) related to policyholder dividend obligation.",
        "label": "Changes In Net Unrealized Investment Gains (Losses) Related To Policyholder Dividend Obligation",
        "verboseLabel": "Policyholder dividend obligation"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToPolicyholderDividendObligation",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToUnrealizedInvestmentGainsLossesDuringPeriod": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the increase (decrease) in net unrealized investment gains (losses) related to unrealized investment gains (losses) during the period.",
        "label": "Changes In Net Unrealized Investment Gains Losses Related To Unrealized Investment Gains Losses During Period",
        "verboseLabel": "Unrealized investment gains (losses) during the period"
       }
      }
     },
     "localname": "ChangesInNetUnrealizedInvestmentGainsLossesRelatedToUnrealizedInvestmentGainsLossesDuringPeriod",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ClosedBlockDerivativesChangeInUnrealizedAppreciation": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net increase or decrease in the period in the fair value of derivatives as of the balance sheet date that were allocated to the segregated group of participating or dividend-paying policies and contracts identified as a closed block. Also a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.",
        "label": "Closed Block Derivatives, Change In Unrealized Appreciation",
        "verboseLabel": "Unrealized gains (losses) on derivatives, net of income tax"
       }
      }
     },
     "localname": "ClosedBlockDerivativesChangeInUnrealizedAppreciation",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ClosedBlockLiabilitiesCededToMetLifeReinsuranceOfCharlestonMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Closed Block Liabilities Ceded To MetLife Reinsurance Of Charleston [Member]",
        "label": "Closed Block Liabilities Ceded To MetLife Reinsurance Of Charleston [Member]",
        "terseLabel": "Closed Block Liabilities Ceded To MetLife Reinsurance Of Charleston [Member]"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesCededToMetLifeReinsuranceOfCharlestonMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ClosedBlockLiabilitiesIncomeTaxPayable": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income tax payable by the closed block.",
        "label": "Closed Block Liabilities, Income Tax Payable",
        "terseLabel": "Deferred income tax liability"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesIncomeTaxPayable",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ClosedBlockOperationsRealizedDerivativeGainsLosses": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_ClosedBlockOperationsRevenue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Gains and losses realized for the period from the derivatives allocated to an insurance entity's segregated group of participating or dividend-paying policies and contracts (known as a closed block).",
        "label": "Closed Block Operations Realized Derivative Gains (Losses)",
        "verboseLabel": "Net derivative gains (losses)"
       }
      }
     },
     "localname": "ClosedBlockOperationsRealizedDerivativeGainsLosses",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_CoinsuranceFundsWithheldBasisPercent": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of business ceded on a coinsurance funds withheld basis.",
        "label": "Coinsurance Funds Withheld Basis, Percent",
        "terseLabel": "Coinsurance Funds Withheld Basis, Percent"
       }
      }
     },
     "localname": "CoinsuranceFundsWithheldBasisPercent",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_CommissionsFeesAndOtherIncomeAssumed": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fees, commissions and other revenues assumed from other insurers as a result of reinsurance arrangements.",
        "label": "Commissions Fees And Other Income Assumed",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "CommissionsFeesAndOtherIncomeAssumed",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ContingenciesCommitmentsandGuaranteesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contingencies, Commitments and Guarantees [Abstract]",
        "label": "Contingencies, Commitments and Guarantees [Abstract]",
        "terseLabel": "Contingencies, Commitments and Guarantees [Abstract]"
       }
      }
     },
     "localname": "ContingenciesCommitmentsandGuaranteesAbstract",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_CreditForwardsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts negotiated between two parties to purchase and sell a specific quantity of a corporate bond at a price specified at origination of the contract, with delivery and settlement at a specified future date. When the primary purpose of entering into the contract is to hedge against changes in purchase price due to changes in credit spreads, these contracts are classified as credit forwards.",
        "label": "Credit forwards [Member]",
        "terseLabel": "Credit forwards [Member]"
       }
      }
     },
     "localname": "CreditForwardsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_CurrentexpectedcreditLossDebtSecuritiesPortionRecognizedinEarnings": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Current expected credit Loss, Debt Securities, Portion Recognized in Earnings",
        "label": "Current expected credit Loss, Debt Securities, Portion Recognized in Earnings",
        "negatedTerseLabel": "Current expected credit loss recognized in earnings"
       }
      }
     },
     "localname": "CurrentexpectedcreditLossDebtSecuritiesPortionRecognizedinEarnings",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DebtInstrumentsCarryingAmount": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt Instruments, Carrying Amount",
        "label": "Debt Instruments, Carrying Amount",
        "terseLabel": "Debt Instruments, Carrying Amount"
       }
      }
     },
     "localname": "DebtInstrumentsCarryingAmount",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DebtServiceCoverageRatioByRangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt Service Coverage Ratio By Range Axis.",
        "label": "Debt Service Coverage Ratio by Range [Axis]",
        "terseLabel": "Debt Service Coverage Ratio by Range [Axis]"
       }
      }
     },
     "localname": "DebtServiceCoverageRatioByRangeAxis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_DebtServiceCoverageRatioByRangeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt Service Coverage Ratio By Range Domain.",
        "label": "Debt Service Coverage Ratio by Range [Domain]",
        "terseLabel": "Debt Service Coverage Ratio by Range [Domain]"
       }
      }
     },
     "localname": "DebtServiceCoverageRatioByRangeDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DebtServiceCoverageRatioRangeOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a debt service coverage ratio of more than 1.20x.",
        "label": "Debt Service Coverage Ratio Range One [Member]",
        "terseLabel": "Greater than 1.20x"
       }
      }
     },
     "localname": "DebtServiceCoverageRatioRangeOneMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DebtServiceCoverageRatioRangeThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a debt service coverage ratio of less than 1.00x.",
        "label": "Debt Service Coverage Ratio Range Three [Member]",
        "terseLabel": "Less than 1.00x"
       }
      }
     },
     "localname": "DebtServiceCoverageRatioRangeThreeMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DebtServiceCoverageRatioRangeTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a debt service coverage ratio of 1.00x - 1.20x.",
        "label": "Debt Service Coverage Ratio Range Two [Member]",
        "terseLabel": "1.00x\u00a0-\u00a01.20x"
       }
      }
     },
     "localname": "DebtServiceCoverageRatioRangeTwoMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_Deferralrentalpaymentforleveragedanddirectfinanceleases": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferral rental payment for leveraged and direct finance leases due to Covid-19",
        "label": "Deferral rental payment for leveraged and direct finance leases",
        "terseLabel": "Deferral rental payment for leveraged and direct finance leases"
       }
      }
     },
     "localname": "Deferralrentalpaymentforleveragedanddirectfinanceleases",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DeferredPolicyAcquisitionCostsandPresentValueofFutureInsuranceProfitsCeded": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount ceded, after accumulated amortization, of deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination.",
        "label": "Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Ceded",
        "terseLabel": "Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Ceded"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostsandPresentValueofFutureInsuranceProfitsCeded",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DeferredmortgageloaninterestandprincipalpaymentsduetoCOVID19": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Deferred commercial mortgage loan interest and principal payments due to COVID-19",
        "label": "Deferred mortgage loan interest and principal payments due to COVID-19",
        "terseLabel": "Deferred mortgage loan interest and principal payments due to COVID-19"
       }
      }
     },
     "localname": "DeferredmortgageloaninterestandprincipalpaymentsduetoCOVID19",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DerivativeAssetCollateralObligationToReturnSecuritiesOffset": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of obligation to return securities collateral under master netting arrangements offset against derivative assets.",
        "label": "Derivative Asset, Collateral, Obligation to Return Securities, Offset",
        "negatedLabel": "Securities collateral on derivative assets"
       }
      }
     },
     "localname": "DerivativeAssetCollateralObligationToReturnSecuritiesOffset",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DerivativeAssetFairValueGrossAssetExcludingAccruals": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement and accruals.",
        "label": "Derivative Asset, Fair Value, Gross Asset Excluding Accruals",
        "terseLabel": "Derivative Asset, Fair Value, Gross Asset Excluding Accruals"
       }
      }
     },
     "localname": "DerivativeAssetFairValueGrossAssetExcludingAccruals",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DerivativeLiabilitiesWithinSeparateAccountsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative liabilities, within separate account liabilities, that are measured at fair value on a recurring basis.",
        "label": "Derivative Liabilities Within Separate Accounts [Member]",
        "terseLabel": "Derivative Liabilities Within Separate Accounts"
       }
      }
     },
     "localname": "DerivativeLiabilitiesWithinSeparateAccountsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DerivativeLiabilityCollateralRightToReclaimSecuritiesOffset": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of right to receive securities collateral under master netting arrangements offset against derivative liabilities.",
        "label": "Derivative Liability, Collateral, Right to Reclaim Securities, Offset",
        "negatedLabel": "Securities collateral on derivative liabilities"
       }
      }
     },
     "localname": "DerivativeLiabilityCollateralRightToReclaimSecuritiesOffset",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DerivativeLiabilityFairValueGrossLiabilityExcludingAccruals": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement and accruals.",
        "label": "Derivative Liability, Fair Value, Gross Liability Excluding Accruals",
        "terseLabel": "Derivative Liability, Fair Value, Gross Liability Excluding Accruals"
       }
      }
     },
     "localname": "DerivativeLiabilityFairValueGrossLiabilityExcludingAccruals",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_DerivativesNotSubjectToCreditContingentProvisionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivatives Not Subject To Credit Contingent Provisions Member.",
        "label": "Derivatives Not Subject To Credit-Contingent Provisions [Member]",
        "verboseLabel": "Estimated fair value of collateral provided:"
       }
      }
     },
     "localname": "DerivativesNotSubjectToCreditContingentProvisionsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DerivativesSubjectToCreditContingentProvisionsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivatives Subject To Credit Contingent Provisions Member.",
        "label": "Derivatives Subject To Credit-Contingent Provisions [Member]",
        "verboseLabel": "Estimated fair value of derivatives in a net liability position (1)"
       }
      }
     },
     "localname": "DerivativesSubjectToCreditContingentProvisionsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DirectGuaranteedMinimumBenefitMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Direct Guaranteed Minimum Benefit",
        "label": "Direct Guaranteed Minimum Benefit [Member]",
        "verboseLabel": "Direct guaranteed minimum benefits"
       }
      }
     },
     "localname": "DirectGuaranteedMinimumBenefitMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_DistributionandAdministrativeServicesfeesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Distribution and Administrative Services fees",
        "label": "Distribution and Administrative Services fees [Member]",
        "terseLabel": "Recordkeeping and administrative services"
       }
      }
     },
     "localname": "DistributionandAdministrativeServicesfeesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_EffectsofDerivativesonConsolidatedStatementsofOperationsandComprehensiveIncomeLossMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]",
        "label": "Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]",
        "terseLabel": "Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]"
       }
      }
     },
     "localname": "EffectsofDerivativesonConsolidatedStatementsofOperationsandComprehensiveIncomeLossMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_EquityFuturesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Equity Futures Member.",
        "label": "Equity Futures [Member]",
        "terseLabel": "Equity futures"
       }
      }
     },
     "localname": "EquityFuturesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_EquityMarketRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The primary underlying risk exposure of the derivative is equity market risk.",
        "label": "Equity Market Risk [Member]",
        "terseLabel": "Equity Market Risk [Member]"
       }
      }
     },
     "localname": "EquityMarketRiskMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_EquityTotalReturnSwapsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts where a set of future cash flows are agreed to be exchanged at set dates in the future and are broken down as floating and equity legs. The floating leg is tied to LIBOR and the equity leg is based on performance of a stock or stock market index.",
        "label": "Equity Total Return Swaps [Member]",
        "terseLabel": "Equity Total Return Swaps [Member]"
       }
      }
     },
     "localname": "EquityTotalReturnSwapsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_FVOAndTradingSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading and FVO general account securities, FVO contractholder-directed unit-linked investments and FVO securities held by CSEs.",
        "label": "FVOAndTradingSecurities [Member]",
        "terseLabel": "FVO Securities (1)"
       }
      }
     },
     "localname": "FVOAndTradingSecuritiesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_FairValueMortgageLoansNetNotOnRecurringBasis": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total amount of mortgage loans not valued on a recurring basis as of the balance sheet date.",
        "label": "Fair Value Mortgage Loans Net Not On Recurring Basis",
        "verboseLabel": "Mortgage loans"
       }
      }
     },
     "localname": "FairValueMortgageLoansNetNotOnRecurringBasis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_FixedannuitieswithequityindexedreturnsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fixed annuities with equity indexed returns [Member]",
        "label": "Fixed annuities with equity indexed returns [Member]",
        "terseLabel": "Fixed annuities with equity indexed returns [Member]"
       }
      }
     },
     "localname": "FixedannuitieswithequityindexedreturnsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_Fixedmaturitysecuritiesamortizedcostnetofallowanceforcreditlo": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fixed maturity securities, amortized cost net of allowance for credit loss",
        "label": "Fixed maturity securities, amortized cost net of allowance for credit lo",
        "terseLabel": "Amortized Cost net of ACL"
       }
      }
     },
     "localname": "Fixedmaturitysecuritiesamortizedcostnetofallowanceforcreditlo",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_FixedmaturitysecuritieswithoutanallowanceforcreditlossMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fixed maturity securities without an allowance for credit loss [Member]",
        "label": "Fixed maturity securities without an allowance for credit loss [Member]",
        "terseLabel": "Fixed maturity securities without an allowance for credit loss"
       }
      }
     },
     "localname": "FixedmaturitysecuritieswithoutanallowanceforcreditlossMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_FundsWithheldOnCededReinsuranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Funds withheld on ceded reinsurance.",
        "label": "Funds Withheld On Ceded Reinsurance [Member]",
        "terseLabel": "Funds Withheld On Ceded Reinsurance [Member]",
        "verboseLabel": "Funds withheld on ceded reinsurance (including affiliated)"
       }
      }
     },
     "localname": "FundsWithheldOnCededReinsuranceMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_FuturepolicybenefitsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Future policy benefits [Member]",
        "label": "Future policy benefits [Member]",
        "terseLabel": "Future policy benefits [Member]"
       }
      }
     },
     "localname": "FuturepolicybenefitsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_FuturesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Futures.",
        "label": "Futures [Member]",
        "verboseLabel": "Interest rate futures"
       }
      }
     },
     "localname": "FuturesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_GainsLossesOnAssetsAndLiabilitiesHeldByConsolidatedSecuritizationsEntitiesUnderFairValueOptionAndAllOtherGainsLosses": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net gain or loss incurred on assets and liabilities held by consolidated securitizations entities and all other gains and losses.",
        "label": "Gains Losses On Assets And Liabilities Held By Consolidated Securitizations Entities Under Fair Value Option And All Other Gains Losses",
        "terseLabel": "Subtotal"
       }
      }
     },
     "localname": "GainsLossesOnAssetsAndLiabilitiesHeldByConsolidatedSecuritizationsEntitiesUnderFairValueOptionAndAllOtherGainsLosses",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_GainsLossesOnSalesOfOtherLimitedPartnerships": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net gain (loss) resulting from sales and other disposals of other limited partnership interests.",
        "label": "Gains Losses On Sales Of Other Limited Partnerships",
        "terseLabel": "Other limited partnership interests"
       }
      }
     },
     "localname": "GainsLossesOnSalesOfOtherLimitedPartnerships",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_HotelandotherrealestateinvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Hotel and other real estate investments [Member]",
        "label": "Hotel and other real estate investments [Member]",
        "terseLabel": "Other real estate investments"
       }
      }
     },
     "localname": "HotelandotherrealestateinvestmentsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_IncomeTaxExpenseOnChangeInUnrealizedGainOrLoss": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the tax effects occurring during the period which are related to the net unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities and from changes in certain insurance related assets and liabilities. Such tax affects would have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.",
        "label": "Income Tax Expense On Change In Unrealized Gain Or (Loss)",
        "terseLabel": "Deferred income tax benefit (expense)"
       }
      }
     },
     "localname": "IncomeTaxExpenseOnChangeInUnrealizedGainOrLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_IndemnitiesAndGuaranteesContractualLimitationRange": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The range of the contractual limitation for guarantees and indemnities.",
        "label": "Indemnities And Guarantees Contractual Limitation Range",
        "terseLabel": "Indemnities and guarantees contractual limitation range"
       }
      }
     },
     "localname": "IndemnitiesAndGuaranteesContractualLimitationRange",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_IndustrialDomesticCorporateDebtSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Industrial Domestic Corporate Debt Securities Member.",
        "label": "Industrial Domestic Corporate Debt Securities [Member]",
        "terseLabel": "Industrial"
       }
      }
     },
     "localname": "IndustrialDomesticCorporateDebtSecuritiesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_InsuranceCommissionsandFeesNetImpactfromReinsurance": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net impact from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products.",
        "label": "Insurance Commissions and Fees, Net Impact from Reinsurance",
        "terseLabel": "Insurance Commissions and Fees, Net Impact from Reinsurance"
       }
      }
     },
     "localname": "InsuranceCommissionsandFeesNetImpactfromReinsurance",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_InterestCreditedToPolicyholderAccountBalancesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "-- None. No documentation exists for this element. --",
        "label": "Interest Credited To Policyholder Account Balances [Abstract]",
        "terseLabel": "Interest Credited To Policyholder Account Balances [Abstract]"
       }
      }
     },
     "localname": "InterestCreditedToPolicyholderAccountBalancesAbstract",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_InternationalJointVentureMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "International Joint Venture [Member]",
        "label": "International Joint Venture [Member]",
        "terseLabel": "Operating joint ventures"
       }
      }
     },
     "localname": "InternationalJointVentureMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_InvestmentFunds": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investments in fund assets.",
        "label": "Investment Funds",
        "terseLabel": "Other investments"
       }
      }
     },
     "localname": "InvestmentFunds",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_InvestmentPortfolioGainsLosses": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the subtotal of gains (losses)on the investment portfolio.",
        "label": "Investment Portfolio Gains Losses",
        "verboseLabel": "Subtotal - investment portfolio gains (losses)"
       }
      }
     },
     "localname": "InvestmentPortfolioGainsLosses",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_InvestmentinMortgageLoansonRealEstate": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.",
        "label": "Investment in Mortgage Loans on Real Estate",
        "totalLabel": "Carrying value at estimated fair value"
       }
      }
     },
     "localname": "InvestmentinMortgageLoansonRealEstate",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_InvestmentinMortgageLoansonRealEstateFaceAmountofMortgages": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails": {
       "order": 1.0,
       "parentTag": "mlic_InvestmentinMortgageLoansonRealEstate",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages",
        "label": "Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages",
        "verboseLabel": "Unpaid principal balance"
       }
      }
     },
     "localname": "InvestmentinMortgageLoansonRealEstateFaceAmountofMortgages",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_InvestmentsCreditLossesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investments - Credit Losses Disclosure [Abstract]",
        "label": "Investments - Credit Losses Disclosure [Abstract]",
        "terseLabel": "Investments - Credit Losses Disclosure [Abstract]"
       }
      }
     },
     "localname": "InvestmentsCreditLossesDisclosureAbstract",
     "nsuri": "http://www.metlife.com/20200930",
     "xbrltype": "stringItemType"
    },
    "mlic_LapseRatesDurationRangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lapse Rates Duration Range",
        "label": "Lapse Rates Duration Range [Axis]",
        "terseLabel": "Lapse Rates Duration Range [Axis]"
       }
      }
     },
     "localname": "LapseRatesDurationRangeAxis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_LapseRatesDurationRangeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lapse Rates Duration Range",
        "label": "Lapse Rates Duration Range [Domain]",
        "terseLabel": "Lapse Rates Duration Range [Domain]"
       }
      }
     },
     "localname": "LapseRatesDurationRangeDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_LapseRatesDurationRangeOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lapse Rates Duration Range One",
        "label": "Lapse Rates Duration Range One [Member]",
        "verboseLabel": "Durations 1 - 10"
       }
      }
     },
     "localname": "LapseRatesDurationRangeOneMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_LapseRatesDurationRangeThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lapse Rates Duration Range Three",
        "label": "Lapse Rates Duration Range Three [Member]",
        "verboseLabel": "Durations 21 - 116"
       }
      }
     },
     "localname": "LapseRatesDurationRangeThreeMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_LapseRatesDurationRangeTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Lapse Rates Duration Range Two",
        "label": "Lapse Rates Duration Range Two [Member]",
        "verboseLabel": "Durations 11 - 20"
       }
      }
     },
     "localname": "LapseRatesDurationRangeTwoMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_LeasedrealestateinvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Leased real estate investments",
        "label": "Leased real estate investments [Member]",
        "terseLabel": "Leased real estate investments"
       }
      }
     },
     "localname": "LeasedrealestateinvestmentsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_LiabilityforFuturePolicyBenefitbeforeReinsuranceCeded": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before effect of reinsurance, ceded, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.",
        "label": "Liability for Future Policy Benefit, before Reinsurance, Ceded",
        "terseLabel": "Liability for Future Policy Benefit, before Reinsurance, Ceded"
       }
      }
     },
     "localname": "LiabilityforFuturePolicyBenefitbeforeReinsuranceCeded",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_LoansAndLeasesReceivableConsumerMortgagePercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects the percentage of the gross carrying amount of unpaid loans and leases issued to consumers to the total for all consumer loans and leases.",
        "label": "Loans And Leases Receivable Consumer Mortgage Percentage",
        "terseLabel": "Loans Receivable Residential Mortgage Percentage"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableConsumerMortgagePercentage",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_LoansReceivableCommercialAgriculturalMortgagePercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects the percentage of the gross carrying amount of unpaid loans issued to agricultural businesses to provide financing on existing land or a building, which, pursuant to terms of the underlying debt instrument, are secured at a minimum but possibly exclusively by that real property to the total for all commercial agricultural mortgage loans. Mortgages represent permanent financing, and are issued to replace previously existing mortgages or pay off acquisition, development and construction loans, or to provide cash to the borrower.",
        "label": "Loans Receivable Commercial Agricultural Mortgage Percentage",
        "terseLabel": "Loans Receivable Agricultural Mortgage Percentage"
       }
      }
     },
     "localname": "LoansReceivableCommercialAgriculturalMortgagePercentage",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_LoansReceivableCommercialMortgagePercentage": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects the percentage of the gross carrying amount of unpaid loans issued to businesses to provide financing on existing land or a building, which, pursuant to terms of the underlying debt instrument, are secured at a minimum but possibly exclusively by that real property to the total for all commercial mortgage loans. Mortgages represent permanent financing, and are issued to replace previously existing mortgages or pay off acquisition, development and construction loans, or to provide cash to the borrower.",
        "label": "Loans Receivable Commercial Mortgage Percentage",
        "terseLabel": "Loans Receivable Commercial Mortgage Percentage"
       }
      }
     },
     "localname": "LoansReceivableCommercialMortgagePercentage",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_Maturity180to360DaysMemberDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maturity period that is more than 179 days but fewer than 360 days from the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements and FHLB advances.",
        "label": "Maturity 180 to 360 Days [Member] [Domain]",
        "terseLabel": "Maturity 180 to 360 Days [Member] [Domain]"
       }
      }
     },
     "localname": "Maturity180to360DaysMemberDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_Maturity30to180DaysMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maturity period that is more than 29 days but fewer than 180 days from the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements.",
        "label": "Maturity 30 to 180 Days [Member]",
        "terseLabel": "Over 1 to 6 Months"
       }
      }
     },
     "localname": "Maturity30to180DaysMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MeasurementInputCorrelationMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Correlation",
        "label": "Measurement Input, Correlation [Member]",
        "terseLabel": "Measurement Input, Correlation"
       }
      }
     },
     "localname": "MeasurementInputCorrelationMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MeasurementInputLongTermEquityVolatilityMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Long-Term Equity Volatility",
        "label": "Measurement Input, Long-Term Equity Volatility [Member]",
        "terseLabel": "Measurement Input, Long-Term Equity Volatility"
       }
      }
     },
     "localname": "MeasurementInputLongTermEquityVolatilityMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MeasurementInputRepurchaseRateMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Repurchase Rate",
        "label": "Measurement Input, Repurchase Rate [Member]",
        "terseLabel": "Measurement Input, Repurchase Rate"
       }
      }
     },
     "localname": "MeasurementInputRepurchaseRateMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MeasurementInputSwapYieldMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement Input, Swap Yield",
        "label": "Measurement Input, Swap Yield [Member]",
        "terseLabel": "Measurement Input, Swap Yield"
       }
      }
     },
     "localname": "MeasurementInputSwapYieldMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MetLifeHoldingsSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "MetLife Holdings segment.",
        "label": "MetLife Holdings Segment [Member]",
        "terseLabel": "MetLife Holdings"
       }
      }
     },
     "localname": "MetLifeHoldingsSegmentMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MetlifeIncMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "MetLife, Inc.",
        "label": "Metlife Inc [Member]",
        "terseLabel": "Metlife Inc"
       }
      }
     },
     "localname": "MetlifeIncMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MetropolitanMoneyMarketPoolMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Metropolitan Money Market Pool [Member]",
        "label": "Metropolitan Money Market Pool [Member]",
        "terseLabel": "Metropolitan Money Market Pool"
       }
      }
     },
     "localname": "MetropolitanMoneyMarketPoolMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MetropolitanPropertyAndCasualtyInsuranceCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Metropolitan Property and Casualty Insurance Company.",
        "label": "Metropolitan Property And Casualty Insurance Company [Member]",
        "terseLabel": "Metropolitan Property And Casualty Insurance Company"
       }
      }
     },
     "localname": "MetropolitanPropertyAndCasualtyInsuranceCompanyMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortalityRatesRangeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortality Rates Range",
        "label": "Mortality Rates Range [Axis]",
        "terseLabel": "Mortality Rates Range [Axis]"
       }
      }
     },
     "localname": "MortalityRatesRangeAxis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_MortalityRatesRangeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortality Rates Range",
        "label": "Mortality Rates Range [Domain]",
        "terseLabel": "Mortality Rates Range [Domain]"
       }
      }
     },
     "localname": "MortalityRatesRangeDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortalityRatesRangeOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortality Rates Range One",
        "label": "Mortality Rates Range One [Member]",
        "verboseLabel": "Ages 0 - 40"
       }
      }
     },
     "localname": "MortalityRatesRangeOneMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortalityRatesRangeThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortality Rates Range Three",
        "label": "Mortality Rates Range Three [Member]",
        "verboseLabel": "Ages 61 - 115"
       }
      }
     },
     "localname": "MortalityRatesRangeThreeMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortalityRatesRangeTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortality Rates Range Two",
        "label": "Mortality Rates Range Two [Member]",
        "verboseLabel": "Ages 41 - 60"
       }
      }
     },
     "localname": "MortalityRatesRangeTwoMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortgageLoansByCreditQualityIndicatorRangeFourMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a loan-to-value ratio of greater than 80%.",
        "label": "Mortgage Loans By Credit Quality Indicator Range Four [Member]",
        "terseLabel": "Greater than 80%"
       }
      }
     },
     "localname": "MortgageLoansByCreditQualityIndicatorRangeFourMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortgageLoansByCreditQualityIndicatorRangeOneMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a loan-to-value ratio of less than 65%.",
        "label": "Mortgage Loans By Credit Quality Indicator Range One [Member]",
        "terseLabel": "Less than 65%"
       }
      }
     },
     "localname": "MortgageLoansByCreditQualityIndicatorRangeOneMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortgageLoansByCreditQualityIndicatorRangeThreeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a loan-to-value ratio of 76% to 80%.",
        "label": "Mortgage Loans By Credit Quality Indicator Range Three [Member]",
        "terseLabel": "76% to 80%"
       }
      }
     },
     "localname": "MortgageLoansByCreditQualityIndicatorRangeThreeMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortgageLoansByCreditQualityIndicatorRangeTwoMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Mortgage loans with a loan-to-value ratio of 65% to 75%.",
        "label": "Mortgage Loans By Credit Quality Indicator Range Two [Member]",
        "terseLabel": "65% to 75%"
       }
      }
     },
     "localname": "MortgageLoansByCreditQualityIndicatorRangeTwoMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_MortgageLoansWithLTVRatioInExcessOf100Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commercial and Agricultural Mortgage Loans with LTV ratio in excess of 100%",
        "label": "Mortgage Loans with LTV ratio in excess of 100% [Member]",
        "terseLabel": "Mortgage Loans with LTV ratio in excess of 100% [Member]"
       }
      }
     },
     "localname": "MortgageLoansWithLTVRatioInExcessOf100Member",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_NetAmountAtRiskByProductAndGuaranteeGeneralAndSeparateAccountValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of the separate and general accounts corresponding to the specified product, guarantee type and subset of the guarantee.",
        "label": "Net Amount At Risk By Product And Guarantee General And Separate Account Value",
        "verboseLabel": "Total account value (1), (2)"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeGeneralAndSeparateAccountValue",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetChangeInOtherInvestedAssets": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 15.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash outflow (inflow) from other investing activities including derivative instruments, leveraged leases and other invested assets.",
        "label": "Net Change In Other Invested Assets",
        "negatedLabel": "Net change in other invested assets"
       }
      }
     },
     "localname": "NetChangeInOtherInvestedAssets",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetChangeInPayablesForCollateralUnderSecuritiesLoanedAndOtherTransactions": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net change in payables for collateral under securities loaned and other transactions.",
        "label": "Net change in payables for collateral under securities loaned and other transactions",
        "verboseLabel": "Net change in payables for collateral under securities loaned and other transactions"
       }
      }
     },
     "localname": "NetChangeInPayablesForCollateralUnderSecuritiesLoanedAndOtherTransactions",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetDerivativesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The derivative assets and liabilities measured with unobservable inputs, including interest rate contracts, foreign currency exchange rate contracts, credit contracts, and equity market contracts.",
        "label": "NetDerivatives [Member]",
        "verboseLabel": "Net Derivatives"
       }
      }
     },
     "localname": "NetDerivativesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses).",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss",
        "verboseLabel": "Net unrealized investment gains (losses)"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromDacAndVoba": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) allocated from DAC and VOBA.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Allocated From Dac And Voba",
        "verboseLabel": "DAC, VOBA and DSI"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromDacAndVoba",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromInsuranceLiabilityLossRecognition": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) allocated from insurance liability loss recognition.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Allocated From Insurance Liability Loss Recognition",
        "verboseLabel": "Future policy benefits"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromInsuranceLiabilityLossRecognition",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromPolicyHolderDividendObligation": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the subtotal of net unrealized investment gains (losses) related to policyholder dividend obligation.",
        "label": "Net Unrealized Investment Gains (Losses) Included In Accumulated Other Comprehensive Income (Loss) Allocated From Policy Holder Dividend Obligation",
        "verboseLabel": "Policyholder dividend obligation"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAllocatedFromPolicyHolderDividendObligation",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAttributableToCompany": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) attributable to the Company.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Attributable To Company",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAttributableToCompany",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecurities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to fixed maturity securities.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Debt Securities",
        "verboseLabel": "Total fixed maturity securities AFS"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecurities",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecuritiesThatWereTemporarilyImpaired": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to fixed maturity securities that were temporarily impaired.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Debt Securities That Were Temporarily Impaired",
        "verboseLabel": "Fixed maturity securities AFS"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDebtSecuritiesThatWereTemporarilyImpaired",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDeferredIncomeTaxBenefitExpense": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to deferred income tax benefit (expense).",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Deferred Income Tax Benefit Expense",
        "verboseLabel": "Deferred income tax benefit (expense)"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDeferredIncomeTaxBenefitExpense",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDeferredIncomeTaxBenefitExpenseOnWhichNonCreditOttiLossesHaveBeenRecognized": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to deferred income tax benefit (expense) on which noncredit OTTI losses have been recognized.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Deferred Income Tax Benefit Expense On Which Non Credit Otti Losses Have Been Recognized",
        "verboseLabel": "Deferred income tax benefit (expense) related to noncredit OTTI losses recognized in AOCI"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDeferredIncomeTaxBenefitExpenseOnWhichNonCreditOttiLossesHaveBeenRecognized",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDerivatives": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to derivatives.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Derivatives",
        "verboseLabel": "Derivatives"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToDerivatives",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToOtherInvestments": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents net unrealized investment gains (losses) related to other investments.",
        "label": "Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Income Loss Related To Other Investments",
        "verboseLabel": "Other"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossRelatedToOtherInvestments",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossSubtotalOfAllocatedAmounts": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the subtotal of unrealized investment gains (losses) related to allocated amounts.",
        "label": "Net Unrealized Investment Gains (Losses) Included In Accumulated Other Comprehensive Income (Loss) Subtotal Of Allocated Amounts",
        "verboseLabel": "Subtotal"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossSubtotalOfAllocatedAmounts",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossSubtotalOfInvestmentGainsLossesComponents": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item presents the subtotal of net unrealized investment gains (losses) relating to fixed maturity securities, equity securities, derivatives and other investments.",
        "label": "Net Unrealized Investment Gains (Losses) Included In Accumulated Other Comprehensive Income (Loss) Subtotal Of Investment Gains (Losses) Components",
        "verboseLabel": "Subtotal"
       }
      }
     },
     "localname": "NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossSubtotalOfInvestmentGainsLossesComponents",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_NonperformanceRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Non-performance Risk",
        "label": "Nonperformance Risk [Member]",
        "terseLabel": "Nonperformance Risk [Member]"
       }
      }
     },
     "localname": "NonperformanceRiskMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_OtherAnnuityGuaranteesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts that either provide: (i) periodic payments, which vary according to the investment experience of the separate accounts in which the amounts paid to provide for the annuity are allocated. Or (ii) a guaranteed stream of fixed payments.",
        "label": "Other Annuity Guarantees [Member]",
        "verboseLabel": "Other Annuity Guarantees:"
       }
      }
     },
     "localname": "OtherAnnuityGuaranteesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_OtherEmbeddedDerivativesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other Embedded Derivatives",
        "label": "Other Embedded Derivatives [Member]",
        "verboseLabel": "Fixed annuities with equity indexed returns"
       }
      }
     },
     "localname": "OtherEmbeddedDerivativesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_OtherExpenses1": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense classified as other.",
        "label": "Other Expenses1",
        "verboseLabel": "Other expenses"
       }
      }
     },
     "localname": "OtherExpenses1",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherIncomeCeded": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fees, commissions and other revenues ceded to other insurers as a result of reinsurance agreements.",
        "label": "Other Income Ceded",
        "verboseLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "OtherIncomeCeded",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherInvestedAssetsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other invested assets.",
        "label": "Other invested assets [Member]",
        "terseLabel": "Other invested assets"
       }
      }
     },
     "localname": "OtherInvestedAssetsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_OtherInvestmentsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of other investments not otherwise specified in the taxonomy.",
        "label": "Other Investments Fair Value Disclosure",
        "terseLabel": "Other invested assets"
       }
      }
     },
     "localname": "OtherInvestmentsFairValueDisclosure",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherLimitedPartnershipInterests": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The book value of investments in other limited partnership interests.",
        "label": "Other Limited Partnership Interests",
        "verboseLabel": "Other limited partnership interests"
       }
      }
     },
     "localname": "OtherLimitedPartnershipInterests",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherPolicyRelatedBalances": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Liability as of the balance sheet date to the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported. Also includes unearned premiums.",
        "label": "Other Policy-Related Balances",
        "verboseLabel": "Other policy-related balances"
       }
      }
     },
     "localname": "OtherPolicyRelatedBalances",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherPolicyRelatedBalancesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portion of the balance sheet liability as of the balance sheet date to the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported. Also includes unearned premiums.",
        "label": "Other Policy-Related Balances [Member]",
        "terseLabel": "Other policy-related balances [Member]"
       }
      }
     },
     "localname": "OtherPolicyRelatedBalancesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_OtherThanTemporaryImpairmentsOnDebtSecuritiesTransferredToOtherComprehensiveIncomeLoss": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income loss.",
        "label": "Other Than Temporary Impairments On Debt Securities Transferred To Other Comprehensive Income Loss",
        "terseLabel": "Gross Unrealized OTTI Loss",
        "verboseLabel": "Fixed maturity securities AFS with noncredit OTTI losses included in AOCI"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentsOnDebtSecuritiesTransferredToOtherComprehensiveIncomeLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_OtherrevenuefromservicecontractsfromcustomersMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Other revenue from service contracts from customers [Member]",
        "label": "Other revenue from service contracts from customers [Member]",
        "terseLabel": "Other revenue from service contracts from customers"
       }
      }
     },
     "localname": "OtherrevenuefromservicecontractsfromcustomersMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_PaidUpGuaranteesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Paid Up Guarantees.",
        "label": "Paid-Up Guarantees [Member]",
        "verboseLabel": "Paid-Up Guarantees"
       }
      }
     },
     "localname": "PaidUpGuaranteesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_PayablesForCollateralUnderSecuritiesLoanedAndOtherTransactions": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of cash received as security in return for loaning securities to another party and the amount of the obligation to return cash collateral under master netting arrangements that have not been offset against net derivative instrument positions.",
        "label": "Payables For Collateral Under Securities Loaned And Other Transactions",
        "verboseLabel": "Payables for collateral under securities loaned and other transactions"
       }
      }
     },
     "localname": "PayablesForCollateralUnderSecuritiesLoanedAndOtherTransactions",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_PercentageOfFinancingReceivableGross": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Financing Receivable, Gross",
        "label": "Percentage Of Financing Receivable, Gross",
        "terseLabel": "Percentage Of Mortgage Loans, Gross"
       }
      }
     },
     "localname": "PercentageOfFinancingReceivableGross",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfGrossUnrealizedLoss": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The percentage of gross unrealized loss.",
        "label": "Percentage Of Gross Unrealized Loss",
        "verboseLabel": "Percentage of gross unrealized loss"
       }
      }
     },
     "localname": "PercentageOfGrossUnrealizedLoss",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfLoansAndLeasesReceivableConsumerOtherToMortgageLoansOnRealEstateCommercialAndConsumerNet": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of loans and leases receivable consumer other to total mortgage loans on real estate.",
        "label": "Percentage Of Loans And Leases Receivable Consumer Other To Mortgage Loans On Real Estate Commercial And Consumer Net",
        "terseLabel": "Percentage Of Loans And Leases Receivable Consumer Other To Mortgage Loans On Real Estate Commercial And Consumer Net"
       }
      }
     },
     "localname": "PercentageOfLoansAndLeasesReceivableConsumerOtherToMortgageLoansOnRealEstateCommercialAndConsumerNet",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfMortgageLoansClassifiedAsPerforming": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The percentage of all mortgage loans that are classified as performing.",
        "label": "Percentage of Mortgage Loans Classified as Performing",
        "terseLabel": "Percentage of Mortgage Loans Classified as Performing"
       }
      }
     },
     "localname": "PercentageOfMortgageLoansClassifiedAsPerforming",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfMortgageLoansHeldForInvestmentNetToMortgageLoansOnRealEstateCommercialAndConsumerNet": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of Mortgage Loans Held-for-investment, net to total Mortgage Loans on Real Estate.",
        "label": "Percentage Of Mortgage Loans Held For Investment Net To Mortgage Loans On Real Estate Commercial And Consumer Net",
        "terseLabel": "Percentage Of Mortgage Loans Held For Investment Net To Mortgage Loans On Real Estate Commercial And Consumer Net"
       }
      }
     },
     "localname": "PercentageOfMortgageLoansHeldForInvestmentNetToMortgageLoansOnRealEstateCommercialAndConsumerNet",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfMortgageLoansHeldForInvestmentToMortgageLoansOnRealEstateCommercialAndConsumerNet": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of Mortgage Loans Held For Investment to total Mortgage Loans on Real Estate.",
        "label": "Percentage Of Mortgage Loans Held For Investment To Mortgage Loans On Real Estate Commercial And Consumer Net",
        "terseLabel": "Percentage Of mortgage total recorded investment To Mortgage Loans On Real Estate Commercial and Consumer Net"
       }
      }
     },
     "localname": "PercentageOfMortgageLoansHeldForInvestmentToMortgageLoansOnRealEstateCommercialAndConsumerNet",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfMortgageLoansOnRealEstateToMortgageLoansOnRealEstateCommercialAndConsumerNet": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of Mortgage Loans On Real Estate to total Mortgage Loans on Real Estate.",
        "label": "Percentage Of Mortgage Loans On Real Estate To Mortgage Loans On Real Estate Commercial And Consumer Net",
        "terseLabel": "Percentage Of Mortgage Loans On Real Estate To Mortgage Loans On Real Estate Commercial And Consumer Net"
       }
      }
     },
     "localname": "PercentageOfMortgageLoansOnRealEstateToMortgageLoansOnRealEstateCommercialAndConsumerNet",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageOfMortgageLoansWithLTVRatioInExcessOf100": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of commercial and agricultural mortgage loans with LTV ratio in excess of 100%",
        "label": "Percentage of mortgage loans with LTV ratio in excess of 100%",
        "terseLabel": "Percentage of mortgage loans with LTV ratio in excess of 100%"
       }
      }
     },
     "localname": "PercentageOfMortgageLoansWithLTVRatioInExcessOf100",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PercentageofAllowanceforCreditLossesforFinancingReceivables": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage Of Allowance for Credit Losses for Financing Receivables",
        "label": "Percentage of Allowance for Credit Losses for Financing Receivables",
        "terseLabel": "Percentage of Allowance for Credit Losses to Mortgage Loans On Real Estate Commercial And Consumer Net"
       }
      }
     },
     "localname": "PercentageofAllowanceforCreditLossesforFinancingReceivables",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_Percentageofmortgageloansheldforsale": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of mortgage loans held-for-sale",
        "label": "Percentage of mortgage loans held-for-sale",
        "terseLabel": "Percentage of mortgage loans held-for-sale"
       }
      }
     },
     "localname": "Percentageofmortgageloansheldforsale",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_Percentageoftotalmortgageloansheldforinvestments": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of total mortgage loans held-for-investments",
        "label": "Percentage of total mortgage loans held-for-investments",
        "terseLabel": "Percentage of total mortgage loans held-for-investments"
       }
      }
     },
     "localname": "Percentageoftotalmortgageloansheldforinvestments",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "mlic_PolicyholderAccountBalancesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Policyholder Account Balances.",
        "label": "Policyholder Account Balances [Member]",
        "terseLabel": "Policyholder Account Balances [Member]",
        "verboseLabel": "Policyholder account balances"
       }
      }
     },
     "localname": "PolicyholderAccountBalancesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_PolicyholderBenefitsAndClaimsIncurredNetAndPolicyholderDividends": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred. Also includes the amount of expense for dividends to policyholders.",
        "label": "Policyholder Benefits And Claims Incurred Net And Policyholder Dividends",
        "verboseLabel": "Policyholder benefits and claims and policyholder dividends"
       }
      }
     },
     "localname": "PolicyholderBenefitsAndClaimsIncurredNetAndPolicyholderDividends",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_PolicyholderContractDepositsFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of the liability of policyholders for deposits held under the terms of insurance contracts.",
        "label": "Policyholder Contract Deposits, Fair Value Disclosure",
        "verboseLabel": "Policyholder account balances"
       }
      }
     },
     "localname": "PolicyholderContractDepositsFairValueDisclosure",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_PremiumsEarnedAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Premiums Earned [Abstract]",
        "label": "Premiums Earned [Abstract]",
        "verboseLabel": "Premiums:"
       }
      }
     },
     "localname": "PremiumsEarnedAbstract",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_PrepaidlegalplansandadministrativeonlycontractsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Revenue related to prepaid legal plans and administrative-only contracts",
        "label": "Prepaid legal plans and administrative-only contracts [Member]",
        "terseLabel": "Prepaid legal plans"
       }
      }
     },
     "localname": "PrepaidlegalplansandadministrativeonlycontractsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ProceedsFromSalesOrDisposalsOfFixedMaturitySecuritiesAndComponentsOfFixedMaturitySecuritiesNetInvestmentGainsAndLossesTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This table presents the proceeds from sales or disposals of fixed maturity securities and the components of fixed maturity securities net investment gains and losses.",
        "label": "Proceeds From Sales Or Disposals Of Fixed Maturity Securities And Components Of Fixed Maturity Securities Net Investment Gains And Losses [Table Text Block]",
        "verboseLabel": "Proceeds from sales or disposals of fixed maturity securities and the components of fixed maturity securities net investment gains and losses"
       }
      }
     },
     "localname": "ProceedsFromSalesOrDisposalsOfFixedMaturitySecuritiesAndComponentsOfFixedMaturitySecuritiesNetInvestmentGainsAndLossesTableTextBlock",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "mlic_Proceedsfromsecuritizationofloanheldforinvestmentcarryingvalue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Proceeds from securitization of loan held for investment carrying value",
        "label": "Proceeds from securitization of loan held for investment carrying value",
        "terseLabel": "Proceeds from securitization of loan held for investment carrying value"
       }
      }
     },
     "localname": "Proceedsfromsecuritizationofloanheldforinvestmentcarryingvalue",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_PurchasedFinancialAssetswithCreditDeteriorationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Line Items] for Purchased Financial Assets with Credit Deterioration [Table]",
        "label": "Purchased Financial Assets with Credit Deterioration [Line Items]",
        "terseLabel": "Purchased Financial Assets with Credit Deterioration [Line Items]"
       }
      }
     },
     "localname": "PurchasedFinancialAssetswithCreditDeteriorationLineItems",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_PurchasedFinancialAssetswithCreditDeteriorationTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Purchased Financial Assets with Credit Deterioration [Table]",
        "label": "Purchased Financial Assets with Credit Deterioration [Table]",
        "terseLabel": "Purchased Financial Assets with Credit Deterioration [Table]"
       }
      }
     },
     "localname": "PurchasedFinancialAssetswithCreditDeteriorationTable",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_PurchasedFinancialAssetswithCreditDeteriorationTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "[Table Text Block] for Purchased Financial Assets with Credit Deterioration [Table]",
        "label": "Purchased Financial Assets with Credit Deterioration [Table Text Block]",
        "terseLabel": "Purchased Financial Assets with Credit Deterioration"
       }
      }
     },
     "localname": "PurchasedFinancialAssetswithCreditDeteriorationTableTextBlock",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "mlic_RealEstateJointVenturesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Real estate joint ventures.",
        "label": "Real estate joint ventures [Member]",
        "terseLabel": "Real estate joint ventures"
       }
      }
     },
     "localname": "RealEstateJointVenturesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ReinsuranceAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all reinsurance assets.",
        "label": "Reinsurance Assets",
        "verboseLabel": "Total assets"
       }
      }
     },
     "localname": "ReinsuranceAssets",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ReinsuranceDisclosureLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "-- None. No documentation exists for this element. --",
        "label": "Reinsurance Disclosure [Line Items]",
        "terseLabel": "Reinsurance Disclosure [Line Items]"
       }
      }
     },
     "localname": "ReinsuranceDisclosureLineItems",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_ReinsuranceLiabilities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all reinsurance liabilities.",
        "label": "Reinsurance Liabilities",
        "terseLabel": "Total liabilities"
       }
      }
     },
     "localname": "ReinsuranceLiabilities",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_ReinsuranceMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Affiliated reinsurance.",
        "label": "Reinsurance [Member]",
        "terseLabel": "Reinsurance [Member]"
       }
      }
     },
     "localname": "ReinsuranceMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_RelatedPartyLoan5Member": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Related party loan 5",
        "label": "Related party loan 5 [Member]",
        "terseLabel": "Related party loan 5 [Member]"
       }
      }
     },
     "localname": "RelatedPartyLoan5Member",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ResidentialLoansHeldForInvestmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Residential mortgage loans held for investment, for which the FVO was elected.",
        "label": "Residential Loans Held For Investment [Member]",
        "verboseLabel": "Residential mortgage loans - FVO"
       }
      }
     },
     "localname": "ResidentialLoansHeldForInvestmentMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ScheduleOfEffectOfReinsuranceOnIncomeStatementTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule Of Effect Of Reinsurance On Income Statement.",
        "label": "Schedule Of Effect Of Reinsurance On Income Statement [Table]",
        "terseLabel": "Schedule Of Effect Of Reinsurance On Income Statement [Table]"
       }
      }
     },
     "localname": "ScheduleOfEffectOfReinsuranceOnIncomeStatementTable",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_ScheduleOfSecuritiesByDurationAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule Of Securities By Duration Axis.",
        "label": "Schedule of Securities by Duration [Axis]",
        "terseLabel": "Schedule of Securities by Duration [Axis]"
       }
      }
     },
     "localname": "ScheduleOfSecuritiesByDurationAxis",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "mlic_SecondaryGuaranteesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Secondary Guarantees.",
        "label": "Secondary Guarantees [Member]",
        "verboseLabel": "Secondary Guarantees"
       }
      }
     },
     "localname": "SecondaryGuaranteesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_SecuritiesByDurationDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities By Duration.",
        "label": "Securities by Duration [Domain]",
        "terseLabel": "Securities by Duration [Domain]"
       }
      }
     },
     "localname": "SecuritiesByDurationDomain",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_SecuritiesLendingReinvestmentPortfolioEstimatedFairValue": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents the estimated fair value of the securities lending reinvestment portfolio.",
        "label": "Securities Lending Reinvestment Portfolio Estimated Fair Value",
        "terseLabel": "Reinvestment portfolio - estimated fair value"
       }
      }
     },
     "localname": "SecuritiesLendingReinvestmentPortfolioEstimatedFairValue",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_SeparateAccountAssetsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Separate Account Assets Member.",
        "label": "Separate account assets [Member]",
        "terseLabel": "Separate Accounts"
       }
      }
     },
     "localname": "SeparateAccountAssetsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_ServicesNecessaryToConductTheCompanysActivitiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Services provided necessary to conduct the Company's activities.",
        "label": "Services Necessary To Conduct The Company's Activities [Member]",
        "terseLabel": "Services Necessary To Conduct The Company's Activities"
       }
      }
     },
     "localname": "ServicesNecessaryToConductTheCompanysActivitiesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_StructuredSecuritiesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Structured Securities.",
        "label": "Structured Securities [Member]",
        "terseLabel": "Structured Securities",
        "verboseLabel": "Structured securities (RMBS, CMBS, and ABS)"
       }
      }
     },
     "localname": "StructuredSecuritiesMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_SupplementalCapitalContributionFromParent": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Supplemental capital contribution from parent.",
        "label": "Supplemental Capital Contribution From Parent",
        "terseLabel": "Capital contributions from MetLife, Inc."
       }
      }
     },
     "localname": "SupplementalCapitalContributionFromParent",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_SyntheticGicsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Synthetic Gics Member.",
        "label": "Synthetic GICs [Member]",
        "verboseLabel": "Synthetic GICs"
       }
      }
     },
     "localname": "SyntheticGicsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_TaxCreditsGuaranteedByThirdPartiesAmountThatReducesMaximumExposureToLossRelatedToOtherInvestedAssets": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This caption discloses the amount of tax credits guaranteed by third parties that reduces the Company's maximum exposure to loss related to other invested assets plus any unfunded commitments.",
        "label": "Tax Credits Guaranteed By Third Parties Amount That Reduces Maximum Exposure To Loss Related To Other Invested Assets",
        "terseLabel": "Tax Credits Guaranteed By Third Parties Amount That Reduces Maximum Exposure To Loss Related To Other Invested Assets"
       }
      }
     },
     "localname": "TaxCreditsGuaranteedByThirdPartiesAmountThatReducesMaximumExposureToLossRelatedToOtherInvestedAssets",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "mlic_TaxcreditpartnershipsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tax credit partnerships [Member]",
        "label": "Tax credit partnerships [Member]",
        "terseLabel": "Tax credit partnerships"
       }
      }
     },
     "localname": "TaxcreditpartnershipsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_TwelveMonthsOrGreaterMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Twelve Months Or Greater [Member]",
        "label": "Twelve Months Or Greater [Member]",
        "terseLabel": "Twelve Months Or Greater"
       }
      }
     },
     "localname": "TwelveMonthsOrGreaterMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "mlic_UniversalAndVariableLifeContractsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts resulting in claim amounts that the Company would incur if death claims were filed on all contracts on the balance sheet date.",
        "label": "Universal And Variable Life Contracts [Member]",
        "verboseLabel": "Universal and Variable Life Contracts"
       }
      }
     },
     "localname": "UniversalAndVariableLifeContractsMember",
     "nsuri": "http://www.metlife.com/20200930",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_AffiliatedEntityMember": {
     "auth_ref": [
      "r369",
      "r577",
      "r578",
      "r580",
      "r826"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Affiliated Entity [Member]",
        "terseLabel": "Affiliated Entity"
       }
      }
     },
     "localname": "AffiliatedEntityMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidatedEntitiesAxis": {
     "auth_ref": [
      "r441",
      "r442",
      "r449",
      "r450",
      "r826"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Consolidated Entities [Axis]",
        "terseLabel": "Consolidated Entities [Axis]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidatedEntitiesDomain": {
     "auth_ref": [
      "r441",
      "r442",
      "r449",
      "r450"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Consolidated Entities [Domain]",
        "terseLabel": "Consolidated Entities [Domain]"
       }
      }
     },
     "localname": "ConsolidatedEntitiesDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ConsolidationItemsAxis": {
     "auth_ref": [
      "r157",
      "r170",
      "r171",
      "r172",
      "r173",
      "r175",
      "r177",
      "r181"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Consolidation Items [Axis]",
        "terseLabel": "Consolidation Items [Axis]"
       }
      }
     },
     "localname": "ConsolidationItemsAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ConsolidationItemsDomain": {
     "auth_ref": [
      "r157",
      "r170",
      "r171",
      "r172",
      "r173",
      "r175",
      "r177",
      "r181"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Consolidation Items [Domain]",
        "terseLabel": "Consolidation Items [Domain]"
       }
      }
     },
     "localname": "ConsolidationItemsDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember": {
     "auth_ref": [
      "r121",
      "r129",
      "r237",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption, Adjusted Balance [Member]",
        "terseLabel": "Cumulative Effect, Period of Adoption, Adjusted Balance [Member]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember": {
     "auth_ref": [
      "r121",
      "r129",
      "r237",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption, Adjustment [Member]",
        "terseLabel": "Cumulative Effect, Period of Adoption, Adjustment [Member]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAdjustmentMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionAxis": {
     "auth_ref": [
      "r121",
      "r129",
      "r237",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption [Axis]",
        "terseLabel": "Cumulative Effect, Period of Adoption [Axis]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_CumulativeEffectPeriodOfAdoptionDomain": {
     "auth_ref": [
      "r121",
      "r129",
      "r237",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cumulative Effect, Period of Adoption [Domain]",
        "terseLabel": "Cumulative Effect, Period of Adoption [Domain]"
       }
      }
     },
     "localname": "CumulativeEffectPeriodOfAdoptionDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MaximumMember": {
     "auth_ref": [
      "r402",
      "r407",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r620",
      "r747",
      "r752"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Maximum [Member]",
        "terseLabel": "Maximum"
       }
      }
     },
     "localname": "MaximumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_MinimumMember": {
     "auth_ref": [
      "r402",
      "r407",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r620",
      "r747",
      "r752"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Minimum [Member]",
        "terseLabel": "Minimum"
       }
      }
     },
     "localname": "MinimumMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ParentCompanyMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Parent Company [Member]",
        "terseLabel": "Parent Company"
       }
      }
     },
     "localname": "ParentCompanyMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_PartnershipInterestMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Partnership Interest [Member]",
        "terseLabel": "Other limited partnership interests"
       }
      }
     },
     "localname": "PartnershipInterestMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_ProductOrServiceAxis": {
     "auth_ref": [
      "r183",
      "r309",
      "r310",
      "r621",
      "r743",
      "r749"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Axis]",
        "terseLabel": "Product and Service [Axis]",
        "verboseLabel": "Reinsurance Premiums for Insurance Companies, by Product Segment [Axis]"
       }
      }
     },
     "localname": "ProductOrServiceAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails",
      "http://www.metlife.com/role/OtherRevenuesDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_ProductsAndServicesDomain": {
     "auth_ref": [
      "r183",
      "r309",
      "r310",
      "r621",
      "r743",
      "r749"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Product and Service [Domain]",
        "terseLabel": "Product and Service [Domain]",
        "verboseLabel": "Reinsurance Premiums for Insurance Companies, by Product Segment [Domain]"
       }
      }
     },
     "localname": "ProductsAndServicesDomain",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails",
      "http://www.metlife.com/role/OtherRevenuesDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_RangeAxis": {
     "auth_ref": [
      "r343",
      "r402",
      "r407",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r620",
      "r747",
      "r752"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statistical Measurement [Axis]",
        "terseLabel": "Statistical Measurement [Axis]"
       }
      }
     },
     "localname": "RangeAxis",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "srt_RangeMember": {
     "auth_ref": [
      "r343",
      "r402",
      "r407",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r620",
      "r747",
      "r752"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statistical Measurement [Domain]",
        "terseLabel": "Statistical Measurement [Domain]"
       }
      }
     },
     "localname": "RangeMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "srt_WeightedAverageMember": {
     "auth_ref": [
      "r589",
      "r591",
      "r594"
     ],
     "lang": {
      "en-US": {
       "role": {
        "label": "Weighted Average [Member]",
        "terseLabel": "Weighted Average"
       }
      }
     },
     "localname": "WeightedAverageMember",
     "nsuri": "http://fasb.org/srt/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingStandardsUpdate201613Member": {
     "auth_ref": [
      "r233"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accounting Standards Update 2016-13 Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.",
        "label": "Accounting Standards Update 2016-13 [Member]",
        "terseLabel": "Accounting Standards Update 2016-13"
       }
      }
     },
     "localname": "AccountingStandardsUpdate201613Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountingStandardsUpdate201712Member": {
     "auth_ref": [
      "r511"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accounting Standards Update 2017-12 Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.",
        "label": "Accounting Standards Update 2017-12 [Member]",
        "terseLabel": "Accounting Standards Update 2017-12"
       }
      }
     },
     "localname": "AccountingStandardsUpdate201712Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccountsNotesAndLoansReceivableLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Accounts, Notes, Loans and Financing Receivable [Line Items]",
        "terseLabel": "Accounts, Notes, Loans and Financing Receivable [Line Items]"
       }
      }
     },
     "localname": "AccountsNotesAndLoansReceivableLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccruedInvestmentIncomeReceivable": {
     "auth_ref": [
      "r11",
      "r639",
      "r697"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.",
        "label": "Accrued Investment Income Receivable",
        "terseLabel": "Accrued investment income relating to variable interest entities",
        "verboseLabel": "Accrued investment income (includes $1 and $1, respectively, relating to variable interest entities)"
       }
      }
     },
     "localname": "AccruedInvestmentIncomeReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccruedLiabilitiesMember": {
     "auth_ref": [
      "r23"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered.",
        "label": "Accrued Liabilities [Member]",
        "terseLabel": "Accrued Liabilities [Member]"
       }
      }
     },
     "localname": "AccruedLiabilitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": {
     "auth_ref": [
      "r49",
      "r54",
      "r56",
      "r448"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.",
        "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]",
        "verboseLabel": "Defined Benefit Plans Adjustment"
       }
      }
     },
     "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember": {
     "auth_ref": [
      "r54",
      "r63",
      "r447"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.",
        "label": "Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]",
        "terseLabel": "Unrealized Gains (Losses) on Derivatives"
       }
      }
     },
     "localname": "AccumulatedGainLossNetCashFlowHedgeParentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember": {
     "auth_ref": [
      "r46",
      "r47",
      "r48",
      "r54",
      "r56"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.",
        "label": "AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]",
        "terseLabel": "Unrealized Investment Gains (Losses), Net of Related Offsets"
       }
      }
     },
     "localname": "AccumulatedNetUnrealizedInvestmentGainLossMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Accumulated Other Comprehensive Income (Loss) [Line Items]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Line Items]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r14",
      "r51",
      "r53",
      "r54",
      "r693",
      "r761",
      "r765"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.",
        "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period",
        "verboseLabel": "Accumulated other comprehensive income (loss) (\"AOCI\")"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": {
     "auth_ref": [
      "r553",
      "r554",
      "r555",
      "r556",
      "r557",
      "r559"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).",
        "label": "Accumulated Other Comprehensive Income (Loss) [Table]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Table]"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeLossTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [
      "r50",
      "r54",
      "r56",
      "r118",
      "r119",
      "r120",
      "r448",
      "r756",
      "r757"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.",
        "label": "AOCI Attributable to Parent [Member]",
        "terseLabel": "Accumulated Other Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "AccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AccumulatedTranslationAdjustmentMember": {
     "auth_ref": [
      "r45",
      "r54",
      "r56",
      "r448",
      "r554",
      "r555",
      "r556",
      "r557",
      "r559"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Accumulated other comprehensive income (loss) resulting from foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to the parent.",
        "label": "Accumulated Foreign Currency Adjustment Attributable to Parent [Member]",
        "verboseLabel": "Foreign Currency Translation Adjustments"
       }
      }
     },
     "localname": "AccumulatedTranslationAdjustmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdditionalPaidInCapital": {
     "auth_ref": [
      "r12",
      "r416"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.",
        "label": "Additional Paid in Capital",
        "verboseLabel": "Additional paid-in capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapital",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AdditionalPaidInCapitalMember": {
     "auth_ref": [
      "r118",
      "r119",
      "r120",
      "r413",
      "r414",
      "r415"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.",
        "label": "Additional Paid-in Capital [Member]",
        "terseLabel": "Additional Paid-in Capital"
       }
      }
     },
     "localname": "AdditionalPaidInCapitalMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": {
     "auth_ref": [
      "r122",
      "r123",
      "r124",
      "r125",
      "r234",
      "r235",
      "r236",
      "r237",
      "r238",
      "r239",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r425",
      "r426",
      "r427",
      "r428",
      "r622",
      "r623",
      "r624",
      "r754",
      "r755",
      "r756",
      "r757",
      "r758",
      "r759",
      "r760",
      "r761",
      "r762",
      "r763",
      "r764",
      "r765"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by amendment to accounting standards.",
        "label": "Accounting Standards Update [Axis]",
        "terseLabel": "Accounting Standards Update [Axis]"
       }
      }
     },
     "localname": "AdjustmentsForNewAccountingPronouncementsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails",
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AdjustmentsToAdditionalPaidInCapitalOther": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other increase (decrease) in additional paid in capital (APIC).",
        "label": "Adjustments to Additional Paid in Capital, Other",
        "terseLabel": "Capital contributions from MetLife, Inc."
       }
      }
     },
     "localname": "AdjustmentsToAdditionalPaidInCapitalOther",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AgriculturalSectorMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sector of the economy consisting of companies engaged in agricultural business activities.",
        "label": "Agricultural Sector [Member]",
        "terseLabel": "Agricultural Mortgage Loans"
       }
      }
     },
     "localname": "AgriculturalSectorMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock": {
     "auth_ref": [
      "r194",
      "r246"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of allowance for credit loss on financing receivable.",
        "label": "Financing Receivable, Allowance for Credit Loss [Table Text Block]",
        "verboseLabel": "Allowance for Loan and Lease Losses, Provision for Loss, Net"
       }
      }
     },
     "localname": "AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_AllowanceForLoanAndLeaseLossesRealEstate": {
     "auth_ref": [
      "r732"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.",
        "label": "Allowance for Loan and Lease Losses, Real Estate",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period",
        "verboseLabel": "Mortgage loans valuation allowances"
       }
      }
     },
     "localname": "AllowanceForLoanAndLeaseLossesRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AllowanceForLoanAndLeaseLossesWriteoffsNet": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after recoveries, of loans and leases that have been written-off.",
        "label": "Allowance for Loan and Lease Losses Write-offs, Net",
        "negatedTerseLabel": "Charge-offs, net of recoveries"
       }
      }
     },
     "localname": "AllowanceForLoanAndLeaseLossesWriteoffsNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AnnuitizationBenefitMember": {
     "auth_ref": [
      "r748"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The benefit in long-duration contracts to provide a guaranteed annuity payment commencing with the annuitization date. The fixed periodic annuity payments may be determined using the higher of the current accumulated account value that exists at the date of annuitization or the guaranteed amount.",
        "label": "Annuitization Benefit [Member]",
        "verboseLabel": "Guaranteed Annuitization Benefits"
       }
      }
     },
     "localname": "AnnuitizationBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AsbestosIssueMember": {
     "auth_ref": [
      "r295"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Individual or consolidated class action claims alleging that asbestos caused cancer or other illnesses to persons exposed to it.",
        "label": "Asbestos Issue [Member]",
        "verboseLabel": "Asbestos Related Claims"
       }
      }
     },
     "localname": "AsbestosIssueMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_AssetBackedSecuritiesMember": {
     "auth_ref": [
      "r219",
      "r344"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities that are primarily serviced by the cash flows of a discrete pool of receivables or other financial assets for example, but not limited to, credit card receivables, car loans, recreational vehicle loans, and mobile home loans.",
        "label": "Asset-backed Securities [Member]",
        "terseLabel": "ABS"
       }
      }
     },
     "localname": "AssetBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Assets": {
     "auth_ref": [
      "r108",
      "r165",
      "r172",
      "r179",
      "r231",
      "r441",
      "r449",
      "r545",
      "r640",
      "r689"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets",
        "terseLabel": "Assets",
        "totalLabel": "Total assets",
        "verboseLabel": "Total assets"
       }
      }
     },
     "localname": "Assets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets [Abstract]",
        "verboseLabel": "Assets"
       }
      }
     },
     "localname": "AssetsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlock": {
     "auth_ref": [
      "r793",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ExcessOfReportedClosedBlockLiabilitiesOverAssetsDesignatedToClosedBlock",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The sum of cash, cash equivalents, investments and other assets allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Assets Designated to Closed Block",
        "totalLabel": "Total assets designated to the closed block"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets Designated to Closed Block [Abstract]",
        "verboseLabel": "Assets Designated to the Closed Block"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockAccruedInvestmentIncome": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accrued investment income held by the closed block.",
        "label": "Assets Designated to Closed Block, Accrued Investment Income",
        "verboseLabel": "Accrued investment income"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockAccruedInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockCashAndCashEquivalents": {
     "auth_ref": [
      "r793",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash and highly liquid, safe investments that can be readily converted into cash (cash equivalents) allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Assets Designated to Closed Block, Cash and Cash Equivalents",
        "terseLabel": "Cash and cash equivalents"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockCashAndCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockFixedMaturityAvailableForSaleAtFairValue": {
     "auth_ref": [
      "r793",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlockInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investments in debt securities that are deemed to be available for sale that are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block. Change in fair of such securities is a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.",
        "label": "Assets Designated to Closed Block, Fixed Maturity, Available-for-sale, at Fair Value",
        "verboseLabel": "Fixed maturity securities available-for-sale, at estimated fair value"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockFixedMaturityAvailableForSaleAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockIncomeTaxReceivable": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of tax refunds receivable held by the closed block.",
        "label": "Assets Designated to Closed Block, Income Tax Receivable",
        "terseLabel": "Current income tax recoverable"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockIncomeTaxReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockInvestments": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investments held by the closed block.",
        "label": "Assets Designated to Closed Block, Investments",
        "totalLabel": "Total investments"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockMortgageLoansOnRealEstate": {
     "auth_ref": [
      "r793",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlockInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount of investments in mortgage loans on real estate allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Assets Designated to Closed Block, Mortgage Loans on Real Estate",
        "verboseLabel": "Mortgage loans"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockMortgageLoansOnRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockOtherInvestments": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlockInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of other investments held by the closed block.",
        "label": "Assets Designated to Closed Block, Other Investments",
        "verboseLabel": "Other invested assets"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockOtherInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockPolicyLoans": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlockInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount of loans to policy holders secured by benefits under insurance policies that are allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Assets Designated to Closed Block, Policy Loans",
        "verboseLabel": "Policy loans"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockPolicyLoans",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockPremiumsAndOtherReceivablesNet": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after the allowance for doubtful accounts, of premium and other receivables held by the closed block.",
        "label": "Assets Designated to Closed Block, Premiums and Other Receivables, Net",
        "terseLabel": "Premiums, reinsurance and other receivables"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockPremiumsAndOtherReceivablesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsDesignatedToClosedBlockRealEstate": {
     "auth_ref": [
      "r793",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_AssetsDesignatedToClosedBlockInvestments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Real estate investments allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Assets Designated to Closed Block, Real Estate",
        "verboseLabel": "Real estate and real estate joint ventures"
       }
      }
     },
     "localname": "AssetsDesignatedToClosedBlockRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsFairValueAdjustment": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.",
        "label": "Assets, Fair Value Adjustment",
        "terseLabel": "Assets, Fair Value Adjustment"
       }
      }
     },
     "localname": "AssetsFairValueAdjustment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsFairValueDisclosure": {
     "auth_ref": [
      "r517"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
        "label": "Assets, Fair Value Disclosure",
        "verboseLabel": "Total assets"
       }
      }
     },
     "localname": "AssetsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AssetsFairValueDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Assets, Fair Value Disclosure [Abstract]",
        "verboseLabel": "Assets [Abstract]"
       }
      }
     },
     "localname": "AssetsFairValueDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AssumedPremiumsEarned": {
     "auth_ref": [
      "r709",
      "r727",
      "r770",
      "r772"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of earned premiums assumed from other entities.",
        "label": "Assumed Premiums Earned",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "AssumedPremiumsEarned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": {
     "auth_ref": [
      "r208",
      "r264"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Amortized Cost",
        "terseLabel": "Amortized Cost",
        "verboseLabel": "Amortized cost of fixed maturity securities available-for-sale"
       }
      }
     },
     "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": {
     "auth_ref": [
      "r211"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.",
        "label": "Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax",
        "terseLabel": "Gross Unrealized Gain"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.",
        "label": "Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax",
        "terseLabel": "Gross Unrealized Temporary Loss"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Available-for-sale Securities, Debt Maturities [Abstract]",
        "terseLabel": "Available-for-sale Securities, Debt Maturities [Abstract]"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost": {
     "auth_ref": [
      "r216"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "verboseLabel": "Amortized Cost, Due after five years through ten years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue": {
     "auth_ref": [
      "r212",
      "r216",
      "r673"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "verboseLabel": "Estimated Fair Value, Due after five years through ten years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost": {
     "auth_ref": [
      "r215"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five",
        "verboseLabel": "Amortized Cost, Due after one year through five years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue": {
     "auth_ref": [
      "r212",
      "r215",
      "r672"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five",
        "verboseLabel": "Estimated Fair Value, Due after one year through five years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost": {
     "auth_ref": [
      "r217"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10",
        "verboseLabel": "Amortized Cost, Due after ten years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue": {
     "auth_ref": [
      "r212",
      "r217",
      "r674"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10",
        "verboseLabel": "Estimated Fair Value, Due after ten years"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost": {
     "auth_ref": [
      "r214"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One",
        "verboseLabel": "Amortized Cost, Due in one year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue": {
     "auth_ref": [
      "r212",
      "r214",
      "r671"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One",
        "verboseLabel": "Estimated Fair Value, Due in one year or less"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost": {
     "auth_ref": [
      "r218"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.",
        "label": "Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost",
        "terseLabel": "Amortized Cost, Structured Securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue": {
     "auth_ref": [
      "r218"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.",
        "label": "Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value",
        "verboseLabel": "Estimated Fair Value, Structured Securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesDebtSecurities": {
     "auth_ref": [
      "r204",
      "r209",
      "r264",
      "r647"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale",
        "terseLabel": "Estimated Fair Value of Fixed Maturity Securities AFS",
        "verboseLabel": "Fixed maturity securities available-for-sale, at estimated fair value (amortized cost: $162,167 and $154,397, respectively; allowance for credit loss of $37 and $0, respectively)"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesDebtSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsMaturitiesofFixedMaturitySecuritiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesGrossRealizedGains": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.",
        "label": "Available-for-sale Securities, Gross Realized Gains",
        "verboseLabel": "Gross investment gains"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesGrossRealizedGains",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGainLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract]",
        "verboseLabel": "Unrealized investment gains (losses) relating to:"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesGrossUnrealizedGainLossAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_AvailableForSaleSecuritiesTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.",
        "label": "Available-for-sale Securities [Table Text Block]",
        "verboseLabel": "Fixed Maturity Available-for-Sale and Equity Securities"
       }
      }
     },
     "localname": "AvailableForSaleSecuritiesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of loss realized on the sale of debt or equity securities classified as available-for-sale. Excludes other than temporary impairments (OTTI).",
        "label": "Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments",
        "negatedLabel": "Gross investment losses"
       }
      }
     },
     "localname": "AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1": {
     "auth_ref": [
      "r222"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.",
        "label": "Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions",
        "verboseLabel": "Number of Securities"
       }
      }
     },
     "localname": "AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_BalanceSheetLocationAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by location on balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Axis]",
        "terseLabel": "Balance Sheet Location [Axis]"
       }
      }
     },
     "localname": "BalanceSheetLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails",
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_BalanceSheetLocationDomain": {
     "auth_ref": [
      "r472",
      "r479"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Location in the balance sheet (statement of financial position).",
        "label": "Balance Sheet Location [Domain]",
        "terseLabel": "Balance Sheet Location [Domain]"
       }
      }
     },
     "localname": "BalanceSheetLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails",
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_BenefitsLossesAndExpenses": {
     "auth_ref": [
      "r725"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": -1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.",
        "label": "Benefits, Losses and Expenses",
        "totalLabel": "Total expenses"
       }
      }
     },
     "localname": "BenefitsLossesAndExpenses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_BenefitsLossesAndExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Benefits, Losses and Expenses [Abstract]",
        "terseLabel": "Expenses"
       }
      }
     },
     "localname": "BenefitsLossesAndExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CarryingReportedAmountFairValueDisclosureMember": {
     "auth_ref": [
      "r537",
      "r538"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured as reported on the statement of financial position (balance sheet).",
        "label": "Reported Value Measurement [Member]",
        "terseLabel": "Carrying Value"
       }
      }
     },
     "localname": "CarryingReportedAmountFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashAndCashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r2",
      "r19",
      "r102"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash and Cash Equivalents, at Carrying Value",
        "terseLabel": "Cash and cash equivalents relating to variable interest entities",
        "verboseLabel": "Cash and cash equivalents, principally at estimated fair value (includes $25 and $5, respectively, relating to variable interest entities)"
       }
      }
     },
     "localname": "CashAndCashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashAndCashEquivalentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash and Cash Equivalents [Member]",
        "terseLabel": "Cash, cash equivalents and short-term investments"
       }
      }
     },
     "localname": "CashAndCashEquivalentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": {
     "auth_ref": [
      "r95",
      "r102",
      "r105"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents",
        "periodEndLabel": "Cash and cash equivalents, end of period",
        "periodStartLabel": "Cash and cash equivalents, beginning of period"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": {
     "auth_ref": [
      "r95",
      "r552"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect",
        "totalLabel": "Change in cash and cash equivalents"
       }
      }
     },
     "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashEquivalentsAtCarryingValue": {
     "auth_ref": [
      "r19"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "label": "Cash Equivalents, at Carrying Value",
        "verboseLabel": "Cash equivalents"
       }
      }
     },
     "localname": "CashEquivalentsAtCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCashEquivalentsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths": {
     "auth_ref": [
      "r513"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.",
        "label": "Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months",
        "verboseLabel": "Deferred net gains (losses) expected to be reclassified to earnings"
       }
      }
     },
     "localname": "CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CashFlowHedgingMember": {
     "auth_ref": [
      "r469"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Hedge of the exposure to variability in the cash flows of a recognized asset or liability, or of a forecasted transaction, that is attributable to a particular risk.",
        "label": "Cash Flow Hedging [Member]",
        "terseLabel": "Cash Flow Hedging [Member]",
        "verboseLabel": "Cash Flow Hedges [Member]"
       }
      }
     },
     "localname": "CashFlowHedgingMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]",
        "terseLabel": "Non-cash transactions:"
       }
      }
     },
     "localname": "CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CededPremiumsEarned": {
     "auth_ref": [
      "r709",
      "r726",
      "r768",
      "r769",
      "r771",
      "r772"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of earned premiums ceded to other entities.",
        "label": "Ceded Premiums Earned",
        "negatedLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "CededPremiumsEarned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockAccountingPolicy": {
     "auth_ref": [
      "r767",
      "r790"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for defined, limited group of policies and defined set of assets governed by set of operating rules to preserve reasonable dividend expectation of individual policyholder with individual life, health, and annuity policies for which dividends are currently being paid or are expected to be paid under current dividend scale.",
        "label": "Closed Block Accounting Policy [Policy Text Block]",
        "verboseLabel": "Closed Block"
       }
      }
     },
     "localname": "ClosedBlockAccountingPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ClosedBlockAssetsAndLiabilitiesChangeInPolicyholderDividendObligation": {
     "auth_ref": [
      "r794",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For the segregated group of participating or dividend-paying policies and contracts identified as the closed block, the change in the period in the obligation representing amounts to be distributed to policyholders owning contracts in the closed block. Also a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.",
        "label": "Closed Block Assets and Liabilities, Change in Policyholder Dividend Obligation",
        "verboseLabel": "Allocated to policyholder dividend obligation, net of income tax"
       }
      }
     },
     "localname": "ClosedBlockAssetsAndLiabilitiesChangeInPolicyholderDividendObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncome": {
     "auth_ref": [
      "r794",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockAssetsAndLiabilitiesMaximumFutureEarningsToBeRecognized",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The increase or decrease in the period in other comprehensive income within the closed block comprised of the change in (a) dividend obligation to policyholders of the closed block, and (b) unrealized gain (loss) on available for sale securities allocated to the closed block.",
        "label": "Closed Block Assets and Liabilities, Effect on Other Comprehensive Income (Loss)",
        "totalLabel": "Total amounts included in AOCI"
       }
      }
     },
     "localname": "ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Closed Block Assets and Liabilities, Effect on Other Comprehensive Income (Loss) [Abstract]",
        "verboseLabel": "AOCI:"
       }
      }
     },
     "localname": "ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ClosedBlockAssetsAndLiabilitiesMaximumFutureEarningsToBeRecognized": {
     "auth_ref": [
      "r802",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying amount of closed block liabilities in excess of the carrying amount of closed block assets at the date of demutualization (adjusted to eliminate the impact of related amounts in accumulated other comprehensive income).",
        "label": "Closed Block Assets and Liabilities, Maximum Future Earnings to be Recognized",
        "totalLabel": "Maximum future earnings to be recognized from closed block assets and liabilities"
       }
      }
     },
     "localname": "ClosedBlockAssetsAndLiabilitiesMaximumFutureEarningsToBeRecognized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Closed Block Disclosure [Abstract]",
        "terseLabel": "Closed Block Disclosure [Abstract]"
       }
      }
     },
     "localname": "ClosedBlockDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ClosedBlockDisclosureTextBlock": {
     "auth_ref": [
      "r791",
      "r806"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure pertaining to the closed block.",
        "label": "Closed Block Disclosure [Text Block]",
        "verboseLabel": "Closed Block"
       }
      }
     },
     "localname": "ClosedBlockDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlock"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses": {
     "auth_ref": [
      "r794",
      "r805"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in the closed block dividend obligation from the unrealized gain (loss) on investments allocated to the closed block.",
        "label": "Closed Block Dividend Obligation, Change in Unrealized Investment Gain (Loss)",
        "verboseLabel": "Change in unrealized investment and derivative gains (losses)"
       }
      }
     },
     "localname": "ClosedBlockDividendObligationChangeInUnrealizedInvestmentGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockPolicyholderDividendObligationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockDividendObligationTableTextBlock": {
     "auth_ref": [
      "r805"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the changes in the closed block policyholder dividend obligation.",
        "label": "Closed Block Dividend Obligation [Table Text Block]",
        "verboseLabel": "Closed block policyholder dividend obligation"
       }
      }
     },
     "localname": "ClosedBlockDividendObligationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ClosedBlockInvestmentsAvailableForSaleChangeInUnrealizedAppreciation": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockAssetsAndLiabilitiesEffectOnOtherComprehensiveIncome",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net increase or decrease in the period in the fair value of the fixed maturity and equity investments designated as available for sale as of the balance sheet date that were allocated to the segregated group of participating or dividend-paying policies and contracts identified as a closed block. Also a component of change in other comprehensive income in the period, which is reflected in the closed block disclosure.",
        "label": "Closed Block Investments, Available-for-sale, Change in Unrealized Appreciation",
        "verboseLabel": "Unrealized investment gains (losses), net of income tax"
       }
      }
     },
     "localname": "ClosedBlockInvestmentsAvailableForSaleChangeInUnrealizedAppreciation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilities": {
     "auth_ref": [
      "r803",
      "r804"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ExcessOfReportedClosedBlockLiabilitiesOverAssetsDesignatedToClosedBlock",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For the segregated group of participating or dividend-paying policies and contracts along with the assets backing them (known as a closed block), the total of future policy benefits, policyholder account balance, policyholder dividend obligation and any other closed block liabilities.",
        "label": "Closed Block Liabilities",
        "totalLabel": "Total closed block liabilities"
       }
      }
     },
     "localname": "ClosedBlockLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Closed Block Liabilities [Abstract]",
        "verboseLabel": "Closed Block Liabilities"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesFuturePolicyBenefitsAndPolicyholderAccountBalances": {
     "auth_ref": [
      "r795",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The liability as of the balance sheet date for future benefits to be paid to or on behalf of policyholders and expenses, less the present value of future net premiums payable under the insurance contracts and the policy cash accumulations, for the segregated group of participating or dividend-paying policies and contracts identified as a closed block.",
        "label": "Closed Block Liabilities, Future Policy Benefits and Policyholder Account Balances",
        "verboseLabel": "Future policy benefits"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesFuturePolicyBenefitsAndPolicyholderAccountBalances",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesOtherClosedBlockLiabilities": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities allocated to the closed block, classified as other.",
        "label": "Closed Block Liabilities, Other Closed Block Liabilities",
        "verboseLabel": "Other liabilities"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesOtherClosedBlockLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesOtherPolicyholderFunds": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of closed block policyholder funds held, which are refundable.",
        "label": "Closed Block Liabilities, Other Policyholder Funds",
        "verboseLabel": "Other policy-related balances"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesOtherPolicyholderFunds",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesPolicyholderDividendObligation": {
     "auth_ref": [
      "r796",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      },
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The liability as of the balance sheet date for the excess of the cumulative actual closed block earnings over the cumulative expected (actuarially determined) closed block earnings (each) for the period from the actuarial calculation date to the date of measurement. The excess will result in future dividends to closed block policyholders, unless offset by less favorable than expected future performance of the closed block. The policyholder dividend obligation, which may not have a negative balance, recognizes that a portion of earnings in certain cases will not inure to the stockholders of the insurance entity.",
        "label": "Closed Block Dividend Obligation",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period",
        "verboseLabel": "Policyholder dividend obligation"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesPolicyholderDividendObligation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails",
      "http://www.metlife.com/role/ClosedBlockPolicyholderDividendObligationDetails",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockLiabilitiesPolicyholderDividendsPayable": {
     "auth_ref": [
      "r801",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_ClosedBlockLiabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of dividends payable as of the balance sheet date to policyholders of contracts in the closed block.",
        "label": "Closed Block Liabilities, Policyholder Dividends Payable",
        "verboseLabel": "Policyholder dividends payable"
       }
      }
     },
     "localname": "ClosedBlockLiabilitiesPolicyholderDividendsPayable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsBenefitsAndExpense": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockOperationsResultsBeforeIncomeTaxes",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of benefits, claims and expenses that are related to an insurance entity's segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block). Includes, but is not limited to, death benefits, matured endowments, participating dividends, general expenses and deferred acquisition costs related to the closed block.",
        "label": "Closed Block Operations, Benefits and Expense",
        "totalLabel": "Total expenses"
       }
      }
     },
     "localname": "ClosedBlockOperationsBenefitsAndExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsBenefitsAndExpenseAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Closed Block Operations, Benefits and Expense [Abstract]",
        "verboseLabel": "Expenses"
       }
      }
     },
     "localname": "ClosedBlockOperationsBenefitsAndExpenseAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ClosedBlockOperationsIncomeTaxes": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockOperationsNetResults",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of income tax expense or benefit allocated to the operations of the closed block for the period.",
        "label": "Closed Block Operations, Income Taxes",
        "verboseLabel": "Provision for income tax expense (benefit)"
       }
      }
     },
     "localname": "ClosedBlockOperationsIncomeTaxes",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsNetInvestmentIncome": {
     "auth_ref": [
      "r798"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockOperationsRevenue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Income for the period from the investments allocated to an insurance entity's segregated group of participating or dividend-paying policies and contracts (known as a closed block), net of investment expenses, which are typically reported in a table of closed block operations.",
        "label": "Closed Block Operations, Net Investment Income",
        "verboseLabel": "Net investment income"
       }
      }
     },
     "localname": "ClosedBlockOperationsNetInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsNetResults": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net income (loss) from operations of the closed block.",
        "label": "Closed Block Operations, Net Results",
        "totalLabel": "Revenues, net of expenses and provision for income tax expense (benefit)"
       }
      }
     },
     "localname": "ClosedBlockOperationsNetResults",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsNetResultsTableTextBlock": {
     "auth_ref": [
      "r792"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the closed block operations.",
        "label": "Closed Block Operations, Net Results [Table Text Block]",
        "verboseLabel": "Closed block revenues and expenses"
       }
      }
     },
     "localname": "ClosedBlockOperationsNetResultsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ClosedBlockOperationsOtherExpense": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_ClosedBlockOperationsBenefitsAndExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense classified as other allocated to the closed block.",
        "label": "Closed Block Operations, Other Expense",
        "verboseLabel": "Other expenses"
       }
      }
     },
     "localname": "ClosedBlockOperationsOtherExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsPolicyholderBenefits": {
     "auth_ref": [
      "r800"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockOperationsBenefitsAndExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "An expense for the period for estimated policy claims in an insurance entity's segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block), as typically reported in a table of closed block operations as part of summarized financial data.",
        "label": "Closed Block Operations, Policyholder Benefits",
        "verboseLabel": "Policyholder benefits and claims"
       }
      }
     },
     "localname": "ClosedBlockOperationsPolicyholderBenefits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsPolicyholderDividends": {
     "auth_ref": [
      "r801"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_ClosedBlockOperationsBenefitsAndExpense",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "An expense for the period representing distributions paid or accrued for the segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block), which may be presented in a table of closed block operations as part of summarized financial data.",
        "label": "Closed Block Operations, Policyholder Dividends",
        "verboseLabel": "Policyholder dividends"
       }
      }
     },
     "localname": "ClosedBlockOperationsPolicyholderDividends",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsPremiums": {
     "auth_ref": [
      "r797"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockOperationsRevenue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For the segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block), revenue for the period from insurance policy premiums; typically included in a table of closed block operations.",
        "label": "Closed Block Operations, Premiums",
        "verboseLabel": "Premiums"
       }
      }
     },
     "localname": "ClosedBlockOperationsPremiums",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsRealizedInvestmentGainsLosses": {
     "auth_ref": [
      "r799"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_ClosedBlockOperationsRevenue",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Gains and losses realized for the period from the investments allocated to an insurance entity's segregated group of participating or dividend-paying policies and contracts (known as a closed block).",
        "label": "Closed Block Operations, Realized Investment Gains (Losses)",
        "verboseLabel": "Net investment gains (losses)"
       }
      }
     },
     "localname": "ClosedBlockOperationsRealizedInvestmentGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsResultsBeforeIncomeTaxes": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockOperationsNetResults",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The revenues less expenses from operations of the closed block during the period, before income taxes allocated thereto.",
        "label": "Closed Block Operations, Results before Income Taxes",
        "totalLabel": "Revenues, net of expenses before provision for income tax expense (benefit)"
       }
      }
     },
     "localname": "ClosedBlockOperationsResultsBeforeIncomeTaxes",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsRevenue": {
     "auth_ref": [
      "r792"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockOperationsResultsBeforeIncomeTaxes",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total revenues from an insurance company's segregated group of participating or dividend-paying policies and contracts along with the assets allocated to them (known as a closed block).",
        "label": "Closed Block Operations, Revenue",
        "totalLabel": "Total revenues"
       }
      }
     },
     "localname": "ClosedBlockOperationsRevenue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ClosedBlockOperationsRevenueAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Closed Block Operations, Revenue [Abstract]",
        "verboseLabel": "Revenues"
       }
      }
     },
     "localname": "ClosedBlockOperationsRevenueAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockRevenuesandExpensesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CollateralAlreadyPostedAggregateFairValue": {
     "auth_ref": [
      "r496"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.",
        "label": "Collateral Already Posted, Aggregate Fair Value",
        "verboseLabel": "Estimated\u00a0Fair\u00a0Value\u00a0of Collateral Provided"
       }
      }
     },
     "localname": "CollateralAlreadyPostedAggregateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommercialMortgageBackedSecuritiesMember": {
     "auth_ref": [
      "r218",
      "r344"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities collateralized by commercial real estate mortgage loans.",
        "label": "Commercial Mortgage Backed Securities [Member]",
        "terseLabel": "CMBS",
        "verboseLabel": "CMBS"
       }
      }
     },
     "localname": "CommercialMortgageBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommercialPortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to commercial receivables.",
        "label": "Commercial Portfolio Segment [Member]",
        "terseLabel": "Commercial Mortgage Loans"
       }
      }
     },
     "localname": "CommercialPortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommitmentsAndContingencies": {
     "auth_ref": [
      "r26",
      "r287",
      "r652",
      "r700"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.",
        "label": "Commitments and Contingencies",
        "terseLabel": "Contingencies, Commitments and Guarantees (Note 12)"
       }
      }
     },
     "localname": "CommitmentsAndContingencies",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Commitments and Contingencies Disclosure [Abstract]",
        "terseLabel": "Commitments and Contingencies Disclosure [Abstract]"
       }
      }
     },
     "localname": "CommitmentsAndContingenciesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock": {
     "auth_ref": [
      "r285",
      "r296",
      "r303"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for commitments, contingencies, and guarantees.",
        "label": "Commitments Contingencies and Guarantees [Text Block]",
        "verboseLabel": "Contingencies, Commitments and Guarantees"
       }
      }
     },
     "localname": "CommitmentsContingenciesAndGuaranteesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuarantees"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CommitmentsToExtendCreditMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loan commitments are legally binding commitments to extend credit to a counterparty under certain terms and conditions.",
        "label": "Commitments to Extend Credit [Member]",
        "verboseLabel": "Commitments to Fund Partnership Investments, Bank Credit Facilities, Bridge Loans and Private Corporate Bond Investments"
       }
      }
     },
     "localname": "CommitmentsToExtendCreditMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockMember": {
     "auth_ref": [
      "r118",
      "r119"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Stock that is subordinate to all other stock of the issuer.",
        "label": "Common Stock [Member]",
        "verboseLabel": "Common Stock"
       }
      }
     },
     "localname": "CommonStockMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CommonStockParOrStatedValuePerShare": {
     "auth_ref": [
      "r10"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face amount or stated value per share of common stock.",
        "label": "Common Stock, Par or Stated Value Per Share",
        "verboseLabel": "Common stock, par value"
       }
      }
     },
     "localname": "CommonStockParOrStatedValuePerShare",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "perShareItemType"
    },
    "us-gaap_CommonStockSharesAuthorized": {
     "auth_ref": [
      "r10"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.",
        "label": "Common Stock, Shares Authorized",
        "verboseLabel": "Common stock, shares authorized"
       }
      }
     },
     "localname": "CommonStockSharesAuthorized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesIssued": {
     "auth_ref": [
      "r10"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.",
        "label": "Common Stock, Shares, Issued",
        "verboseLabel": "Common stock, shares issued"
       }
      }
     },
     "localname": "CommonStockSharesIssued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockSharesOutstanding": {
     "auth_ref": [
      "r10",
      "r305"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.",
        "label": "Common Stock, Shares, Outstanding",
        "verboseLabel": "Common stock, shares outstanding"
       }
      }
     },
     "localname": "CommonStockSharesOutstanding",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "sharesItemType"
    },
    "us-gaap_CommonStockValue": {
     "auth_ref": [
      "r10"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.",
        "label": "Common Stock, Value, Issued",
        "verboseLabel": "Common stock, par value $0.01 per share; 1,000,000,000 shares authorized; 494,466,664 shares issued and outstanding"
       }
      }
     },
     "localname": "CommonStockValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CompensationAndRetirementDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Retirement Benefits [Abstract]",
        "terseLabel": "Retirement Benefits [Abstract]"
       }
      }
     },
     "localname": "CompensationAndRetirementDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTax": {
     "auth_ref": [
      "r59",
      "r61",
      "r62",
      "r70",
      "r663",
      "r715"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent",
        "totalLabel": "Comprehensive income (loss) attributable to Metropolitan Life Insurance Company"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r59",
      "r61",
      "r69",
      "r439",
      "r440",
      "r460",
      "r662",
      "r714"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest",
        "verboseLabel": "Less: Comprehensive income (loss) attributable to noncontrolling interests, net of income tax"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r59",
      "r61",
      "r68",
      "r438",
      "r460",
      "r661",
      "r713"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.",
        "label": "Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest",
        "verboseLabel": "Comprehensive income (loss)"
       }
      }
     },
     "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ConcentrationRiskPercentage1": {
     "auth_ref": [
      "r146",
      "r147",
      "r186",
      "r539",
      "r540"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the \"benchmark\" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.",
        "label": "Concentration Risk, Percentage",
        "terseLabel": "Securities holdings exposure in single issuer greater than stated percentage of Company's equity"
       }
      }
     },
     "localname": "ConcentrationRiskPercentage1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConcentrationsofCreditRiskNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_ConsolidatedEntitiesMember": {
     "auth_ref": [
      "r625",
      "r627",
      "r629",
      "r631",
      "r633",
      "r635"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Entities which have been consolidated for financial statement presentation purposes.",
        "label": "Consolidated Entities [Member]",
        "terseLabel": "Consolidated Entities"
       }
      }
     },
     "localname": "ConsolidatedEntitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ConsolidationPolicyTextBlock": {
     "auth_ref": [
      "r106",
      "r443"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting.  The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.",
        "label": "Consolidation, Policy [Policy Text Block]",
        "verboseLabel": "Consolidation of Subsidiaries"
       }
      }
     },
     "localname": "ConsolidationPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_CorporateAndOtherMember": {
     "auth_ref": [
      "r152"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Component of an entity that provides financial and operational oversight and administrative support for other segments and other segments not separately reported due to size or nature of business activities. Excludes intersegment elimination and reconciling items.",
        "label": "Corporate and Other [Member]",
        "verboseLabel": "Corporate &amp; Other"
       }
      }
     },
     "localname": "CorporateAndOtherMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r344",
      "r389",
      "r783"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.",
        "label": "Corporate Debt Securities [Member]",
        "netLabel": "U.S. corporate and foreign corporate",
        "terseLabel": "Corporate fixed maturity securities",
        "verboseLabel": "U.S. and foreign corporate"
       }
      }
     },
     "localname": "CorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CostsAndExpensesRelatedParty": {
     "auth_ref": [
      "r74"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Costs of sales and operating expenses for the period incurred from transactions with related parties.",
        "label": "Costs and Expenses, Related Party",
        "terseLabel": "Costs and Expenses, Related Party"
       }
      }
     },
     "localname": "CostsAndExpensesRelatedParty",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRelatedPartyInvestmentTransactionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CreditDefaultSwapBuyingProtectionMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A type of swap transaction used as a credit derivative in which one party makes periodic payments to the other and receives the promise of a pay-off if a third party defaults.",
        "label": "Credit Default Swap, Buying Protection [Member]",
        "terseLabel": "Credit Default Swap, Buying Protection [Member]",
        "verboseLabel": "Credit default swaps\u00a0\u2014\u00a0purchased"
       }
      }
     },
     "localname": "CreditDefaultSwapBuyingProtectionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditDefaultSwapMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A type of swap transaction used as a credit derivative in which one party makes periodic payments to the other and receives the promise of a pay-off if a third party defaults.",
        "label": "Credit Default Swap [Member]",
        "terseLabel": "Single name credit default swaps (3)"
       }
      }
     },
     "localname": "CreditDefaultSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditDefaultSwapSellingProtectionMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A type of swap transaction used as a credit derivative in which one party makes periodic payments to the other and receives the promise of a pay-off if a third party defaults.",
        "label": "Credit Default Swap, Selling Protection [Member]",
        "terseLabel": "Credit Default Swap, Selling Protection [Member]",
        "verboseLabel": "Credit default swaps \u2014 written"
       }
      }
     },
     "localname": "CreditDefaultSwapSellingProtectionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditDerivativeMaximumExposureUndiscounted": {
     "auth_ref": [
      "r500"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.",
        "label": "Credit Derivative, Maximum Exposure, Undiscounted",
        "terseLabel": "Maximum Amount of Future Payments under Credit Default Swaps"
       }
      }
     },
     "localname": "CreditDerivativeMaximumExposureUndiscounted",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CreditDerivativesByContractTypeAxis": {
     "auth_ref": [
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by major type of contract of credit derivatives.",
        "label": "Credit Derivatives Contract Type [Axis]",
        "terseLabel": "Credit Derivatives by Contract Type [Axis]"
       }
      }
     },
     "localname": "CreditDerivativesByContractTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditDerivativesContractTypeDomain": {
     "auth_ref": [
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents major types of credit derivative contracts.",
        "label": "Credit Derivatives Contract Type [Domain]",
        "terseLabel": "Credit Derivatives Contract Type [Domain]"
       }
      }
     },
     "localname": "CreditDerivativesContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditDerivativesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Credit Derivatives [Line Items]",
        "terseLabel": "Credit Derivatives [Line Items]"
       }
      }
     },
     "localname": "CreditDerivativesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_CreditIndexProductMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A credit derivative with an underlying related to an index based on the credit risk of a group of entities.",
        "label": "Credit Index Product [Member]",
        "verboseLabel": "Credit default swaps referencing indices"
       }
      }
     },
     "localname": "CreditIndexProductMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditRiskContractMember": {
     "auth_ref": [
      "r344",
      "r487"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is tied to the creditworthiness or the credit spread of an entity.",
        "label": "Credit Risk Contract [Member]",
        "verboseLabel": "Credit contracts"
       }
      }
     },
     "localname": "CreditRiskContractMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CreditRiskDerivativeAssetsAtFairValue": {
     "auth_ref": [
      "r501"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of credit risk derivative asset.",
        "label": "Credit Risk Derivative Assets, at Fair Value",
        "terseLabel": "Credit Risk Derivative Assets, at Fair Value"
       }
      }
     },
     "localname": "CreditRiskDerivativeAssetsAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CreditRiskDerivativeLiabilitiesAtFairValue": {
     "auth_ref": [
      "r501"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of credit risk derivative liability.",
        "label": "Credit Risk Derivative Liabilities, at Fair Value",
        "terseLabel": "Estimated Fair Value of Credit Default Swaps"
       }
      }
     },
     "localname": "CreditRiskDerivativeLiabilitiesAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CreditRiskDerivativesAtFairValueNet": {
     "auth_ref": [
      "r501"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of credit risk derivative asset after deduction of credit risk derivative liability.",
        "label": "Credit Risk Derivatives, at Fair Value, Net",
        "verboseLabel": "Estimated Fair\u00a0Value of Credit Default Swaps"
       }
      }
     },
     "localname": "CreditRiskDerivativesAtFairValueNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_CurrencySwapMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Swap involving the exchange of principal and interest in one currency for another currency.",
        "label": "Currency Swap [Member]",
        "terseLabel": "Currency Swap [Member]",
        "verboseLabel": "Foreign currency swaps"
       }
      }
     },
     "localname": "CurrencySwapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged": {
     "auth_ref": [
      "r601"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it has sold or re-pledged to counterparties as collateral.",
        "label": "Customer Securities for which Entity has Right to Sell or Repledge, Fair Value of Securities Sold or Repledged",
        "terseLabel": "Customer Securities for which Entity has Right to Sell or Repledge, Fair Value of Securities Sold or Repledged",
        "verboseLabel": "Securities collateral received which the company is permitted to sell or repledge, amount that has been sold or repledged"
       }
      }
     },
     "localname": "CustomerSecuritiesForWhichEntityHasRightToSellOrRepledgeFairValueOfSecuritiesSoldOrRepledged",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentAxis": {
     "auth_ref": [
      "r6",
      "r8",
      "r9",
      "r641",
      "r642",
      "r684"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.",
        "label": "Debt Instrument [Axis]",
        "terseLabel": "Debt Instrument [Axis]"
       }
      }
     },
     "localname": "DebtInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtInstrumentFaceAmount": {
     "auth_ref": [
      "r561",
      "r562"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Face (par) amount of debt instrument at time of issuance.",
        "label": "Debt Instrument, Face Amount",
        "terseLabel": "Debt Instrument, Face Amount"
       }
      }
     },
     "localname": "DebtInstrumentFaceAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtInstrumentInterestRateStatedPercentage": {
     "auth_ref": [
      "r24"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.",
        "label": "Debt Instrument, Interest Rate, Stated Percentage",
        "terseLabel": "Debt Instrument, Interest Rate, Stated Percentage"
       }
      }
     },
     "localname": "DebtInstrumentInterestRateStatedPercentage",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_DebtInstrumentNameDomain": {
     "auth_ref": [
      "r25"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.",
        "label": "Debt Instrument, Name [Domain]",
        "terseLabel": "Debt Instrument, Name [Domain]"
       }
      }
     },
     "localname": "DebtInstrumentNameDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLoss": {
     "auth_ref": [
      "r210",
      "r264",
      "r272",
      "r276"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss",
        "negatedTerseLabel": "Amortized cost of fixed maturity securities valuation allowances",
        "periodEndLabel": "Allowance balance, end of period",
        "periodStartLabel": "Allowance balance, beginning of period",
        "terseLabel": "Amortized cost of fixed maturity securities valuation allowances"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded": {
     "auth_ref": [
      "r273"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), for which no credit loss was previously recorded.",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded",
        "terseLabel": "ACL not previously recorded"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold": {
     "auth_ref": [
      "r274"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale.",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold",
        "negatedTerseLabel": "Securities sold or exchanged"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery": {
     "auth_ref": [
      "r275"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from intent to sell or more likely than not will be required to sell before recovery of amortized cost basis.",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss, Sell before Recovery",
        "negatedTerseLabel": "Securities intended/required to be sold prior to recovery of amortized cost basis"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable": {
     "auth_ref": [
      "r277"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss [Table]",
        "terseLabel": "Debt Securities, Available-for-sale, Allowance for Credit Loss [Table]"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLossTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock": {
     "auth_ref": [
      "r277"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss [Table Text Block]",
        "terseLabel": "Rollforward of Allowance for Credit Loss for FMS AFS by Sector"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal": {
     "auth_ref": [
      "r265",
      "r271"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense (reversal of expense) for expected credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), from change in present value of expected cash flows.",
        "label": "Debt Securities, Available-for-sale, Change in Present Value, Expense (Reversal)",
        "terseLabel": "Changes for securities with previously recorded ACL"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger": {
     "auth_ref": [
      "r224",
      "r269",
      "r278"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer",
        "terseLabel": "Equal to or Greater than 12 Months Estimated Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss": {
     "auth_ref": [
      "r224",
      "r269"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss",
        "terseLabel": "Equal to or Greater than 12 Months Gross Unrealized Loss"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions": {
     "auth_ref": [
      "r267"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions",
        "terseLabel": "Total number of securities in an unrealized loss position equal or greater than 12 months"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months": {
     "auth_ref": [
      "r224",
      "r269",
      "r278"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months",
        "terseLabel": "Less than 12 months Estimated Fair Value"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss": {
     "auth_ref": [
      "r224",
      "r269"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss",
        "terseLabel": "Less than 12 months Gross Unrealized Loss"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions": {
     "auth_ref": [
      "r267"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset.",
        "label": "Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions",
        "terseLabel": "Total number of securities in an unrealized loss position less than 12 months"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput": {
     "auth_ref": [
      "r522"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Debt Securities, Available-for-sale, Measurement Input",
        "terseLabel": "Debt Securities, Available-for-sale, Measurement Input"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition": {
     "auth_ref": [
      "r221",
      "r266",
      "r278"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.",
        "label": "Debt Securities, Available-for-sale, Unrealized Loss Position",
        "terseLabel": "Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPosition",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]",
        "terseLabel": "Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]"
       }
      }
     },
     "localname": "DebtSecuritiesAvailableforsaleAllowanceForCreditLossLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DebtSecuritiesMember": {
     "auth_ref": [
      "r227"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.",
        "label": "Debt Securities [Member]",
        "terseLabel": "Fixed maturity securities AFS"
       }
      }
     },
     "localname": "DebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DeferredIncomeTaxLiabilitiesNet": {
     "auth_ref": [
      "r418",
      "r419"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 9.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.",
        "label": "Deferred Income Tax Liabilities, Net",
        "terseLabel": "Deferred income tax liability"
       }
      }
     },
     "localname": "DeferredIncomeTaxLiabilitiesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1": {
     "auth_ref": [
      "r681",
      "r730"
     ],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 6.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of amortization expense (reversal of expense) for deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination.",
        "label": "Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Amortization",
        "verboseLabel": "Amortization\u00a0of\u00a0DAC\u00a0and\u00a0VOBA"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired": {
     "auth_ref": [
      "r681",
      "r708",
      "r729"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after accumulated amortization, of deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination.",
        "label": "Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Net",
        "terseLabel": "Deferred policy acquisition costs and value of business acquired",
        "verboseLabel": "Deferred policy acquisition costs and value of business acquired"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostsAndValueOfBusinessAcquired",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease": {
     "auth_ref": [
      "r731",
      "r759"
     ],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": -1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": -1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in deferred policy acquisition cost.",
        "label": "Deferred Policy Acquisition Costs, Period Increase (Decrease)",
        "negatedLabel": "Capitalization of DAC"
       }
      }
     },
     "localname": "DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": {
     "auth_ref": [
      "r321",
      "r359",
      "r383",
      "r389",
      "r390"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.",
        "label": "Defined Benefit Plan, Amortization of Gain (Loss)",
        "negatedLabel": "Amortization of net actuarial (gains) losses",
        "terseLabel": "Amortization of net actuarial gains (losses)"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": {
     "auth_ref": [
      "r321",
      "r360",
      "r384",
      "r389",
      "r390"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.",
        "label": "Defined Benefit Plan, Amortization of Prior Service Cost (Credit)",
        "negatedLabel": "Amortization of prior service (costs) credit",
        "verboseLabel": "Amortization of prior service costs (credit)"
       }
      }
     },
     "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanDisclosureLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Defined Benefit Plan Disclosure [Line Items]",
        "terseLabel": "Defined Benefit Plan Disclosure [Line Items]"
       }
      }
     },
     "localname": "DefinedBenefitPlanDisclosureLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": {
     "auth_ref": [
      "r321",
      "r358",
      "r382",
      "r389",
      "r390"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.",
        "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets",
        "negatedTerseLabel": "Expected return on plan assets"
       }
      }
     },
     "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanInterestCost": {
     "auth_ref": [
      "r321",
      "r325",
      "r357",
      "r381",
      "r389",
      "r390"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.",
        "label": "Defined Benefit Plan, Interest Cost",
        "verboseLabel": "Interest costs"
       }
      }
     },
     "localname": "DefinedBenefitPlanInterestCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": {
     "auth_ref": [
      "r355",
      "r379",
      "r389",
      "r390"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.",
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)",
        "terseLabel": "Net periodic benefit costs (credit)",
        "verboseLabel": "Allocated to affiliates"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]",
        "verboseLabel": "Net periodic benefit costs [Abstract]"
       }
      }
     },
     "localname": "DefinedBenefitPlanNetPeriodicBenefitCostAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DefinedBenefitPlanServiceCost": {
     "auth_ref": [
      "r323",
      "r356",
      "r380",
      "r389",
      "r390"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "label": "Defined Benefit Plan, Service Cost",
        "verboseLabel": "Service costs"
       }
      }
     },
     "localname": "DefinedBenefitPlanServiceCost",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DepositAssets": {
     "auth_ref": [
      "r31"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.",
        "label": "Deposit Assets",
        "verboseLabel": "Invested assets on deposit (regulatory deposits)"
       }
      }
     },
     "localname": "DepositAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositHeldInTrustandPledgedasCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Depreciation": {
     "auth_ref": [
      "r100",
      "r280"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.",
        "label": "Depreciation",
        "terseLabel": "Depreciation"
       }
      }
     },
     "localname": "Depreciation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset": {
     "auth_ref": [
      "r35",
      "r463"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.",
        "label": "Derivative Asset, Collateral, Obligation to Return Cash, Offset",
        "negatedLabel": "Cash collateral on derivative assets"
       }
      }
     },
     "localname": "DerivativeAssetCollateralObligationToReturnCashOffset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAssetLiabilityNetMeasurementInput": {
     "auth_ref": [
      "r522"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure net derivative asset (liability).",
        "label": "Derivative Asset (Liability) Net, Measurement Input",
        "terseLabel": "Derivative Asset (Liability) Net, Measurement Input"
       }
      }
     },
     "localname": "DerivativeAssetLiabilityNetMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction": {
     "auth_ref": [
      "r37",
      "r43"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset, deducted from derivative assets.",
        "label": "Derivative Asset, Not Offset, Policy Election Deduction",
        "negatedLabel": "Gross estimated fair value of derivative assets"
       }
      }
     },
     "localname": "DerivativeAssetNotOffsetPolicyElectionDeduction",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeAverageRemainingMaturity1": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Derivative, Average Remaining Maturity",
        "verboseLabel": "Weighted Average Years to Maturity"
       }
      }
     },
     "localname": "DerivativeAverageRemainingMaturity1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_DerivativeCollateralObligationToReturnCash": {
     "auth_ref": [
      "r38",
      "r43",
      "r507"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.",
        "label": "Derivative, Collateral, Obligation to Return Cash",
        "verboseLabel": "Excess cash collateral received on derivatives"
       }
      }
     },
     "localname": "DerivativeCollateralObligationToReturnCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeCollateralObligationToReturnSecurities": {
     "auth_ref": [
      "r38",
      "r43"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of obligation to return securities collateral under master netting arrangements that have not been offset against derivative assets.",
        "label": "Derivative, Collateral, Obligation to Return Securities",
        "terseLabel": "Excess securities collateral received on derivatives"
       }
      }
     },
     "localname": "DerivativeCollateralObligationToReturnSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeCollateralRightToReclaimCash": {
     "auth_ref": [
      "r38",
      "r43",
      "r507"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.",
        "label": "Derivative, Collateral, Right to Reclaim Cash",
        "terseLabel": "Derivative, Collateral, Right to Reclaim Cash"
       }
      }
     },
     "localname": "DerivativeCollateralRightToReclaimCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeCollateralRightToReclaimSecurities": {
     "auth_ref": [
      "r38",
      "r43"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of right to receive securities collateral under master netting arrangements that have not been offset against derivative liabilities.",
        "label": "Derivative, Collateral, Right to Reclaim Securities",
        "verboseLabel": "Excess securities collateral provided on derivatives"
       }
      }
     },
     "localname": "DerivativeCollateralRightToReclaimSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeContractTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.",
        "label": "Derivative Contract [Domain]",
        "terseLabel": "Derivative Contract [Domain]",
        "verboseLabel": "Derivative Contract [Domain]"
       }
      }
     },
     "localname": "DerivativeContractTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/DerivativesTables",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeFairValueOfDerivativeAsset": {
     "auth_ref": [
      "r34",
      "r44",
      "r476",
      "r596"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.",
        "label": "Derivative Asset, Fair Value, Gross Asset",
        "terseLabel": "Derivative assets",
        "verboseLabel": "Estimated Fair Value Assets"
       }
      }
     },
     "localname": "DerivativeFairValueOfDerivativeAsset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral": {
     "auth_ref": [
      "r39",
      "r43",
      "r506"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Asset, Fair Value, Amount Offset Against Collateral",
        "verboseLabel": "Net amount of derivative assets after application of master netting agreements and cash collateral"
       }
      }
     },
     "localname": "DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeFairValueOfDerivativeLiability": {
     "auth_ref": [
      "r34",
      "r44",
      "r476",
      "r596"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.",
        "label": "Derivative Liability, Fair Value, Gross Liability",
        "terseLabel": "Derivative liabilities",
        "verboseLabel": "Estimated Fair Value Liabilities"
       }
      }
     },
     "localname": "DerivativeFairValueOfDerivativeLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral": {
     "auth_ref": [
      "r39",
      "r43",
      "r506"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value, after effects of master netting arrangements, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against the right to receive collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "label": "Derivative Liability, Fair Value, Amount Offset Against Collateral",
        "verboseLabel": "Net amount of derivative liabilities after application of master netting agreements and cash collateral"
       }
      }
     },
     "localname": "DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeGainLossOnDerivativeNet": {
     "auth_ref": [
      "r474"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.",
        "label": "Derivative, Gain (Loss) on Derivative, Net",
        "terseLabel": "Derivative, Gain (Loss) on Derivative, Net"
       }
      }
     },
     "localname": "DerivativeGainLossOnDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeInstrumentDetailAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Derivative Instrument Detail [Abstract]",
        "terseLabel": "Derivative Instrument Detail [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentDetailAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentRiskAxis": {
     "auth_ref": [
      "r473",
      "r478",
      "r482",
      "r489"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of derivative contract.",
        "label": "Derivative Instrument [Axis]",
        "terseLabel": "Derivative Instrument [Axis]",
        "verboseLabel": "Derivative Instrument [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/DerivativesTables",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Derivative Instruments and Hedging Activities Disclosure [Abstract]",
        "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Abstract]"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": {
     "auth_ref": [
      "r516"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.",
        "label": "Derivative Instruments and Hedging Activities Disclosure [Text Block]",
        "terseLabel": "Derivative Instruments and Hedging Activities Disclosure [Text Block]",
        "verboseLabel": "Derivatives"
       }
      }
     },
     "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/Derivatives",
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis": {
     "auth_ref": [
      "r470",
      "r473",
      "r482"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of hedging relationship.",
        "label": "Hedging Relationship [Axis]",
        "terseLabel": "Hedging Relationship [Axis]"
       }
      }
     },
     "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable": {
     "auth_ref": [
      "r470",
      "r473",
      "r482",
      "r489",
      "r490",
      "r509",
      "r512"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.",
        "label": "Derivative Instruments, Gain (Loss) [Table]",
        "terseLabel": "Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]",
        "verboseLabel": "Derivative Instruments, Gain (Loss) [Table]"
       }
      }
     },
     "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesChangesinEstimatedFairValueRelatedtoEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeInstrumentsGainLossLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Derivative Instruments, Gain (Loss) [Line Items]",
        "terseLabel": "Derivative Instruments, Gain (Loss) [Line Items]"
       }
      }
     },
     "localname": "DerivativeInstrumentsGainLossLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesChangesinEstimatedFairValueRelatedtoEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset": {
     "auth_ref": [
      "r35",
      "r463"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of right to receive cash collateral under master netting arrangements offset against derivative liabilities.",
        "label": "Derivative Liability, Collateral, Right to Reclaim Cash, Offset",
        "negatedLabel": "Cash collateral on derivative liabilities"
       }
      }
     },
     "localname": "DerivativeLiabilityCollateralRightToReclaimCashOffset",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction": {
     "auth_ref": [
      "r37",
      "r43"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be offset, deducted from derivative liabilities.",
        "label": "Derivative Liability, Not Offset, Policy Election Deduction",
        "negatedLabel": "Gross estimated fair value of derivative liabilities"
       }
      }
     },
     "localname": "DerivativeLiabilityNotOffsetPolicyElectionDeduction",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeMember": {
     "auth_ref": [
      "r462"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents types of derivative financial instruments which are financial instruments or other contractual arrangements with all three of the following characteristics: (a) it has (1) one or more underlyings and (2) one or more notional amounts or payment provisions or both. Those terms determine the amount of the settlement or settlements, and, in some cases, whether or not a settlement is required; (b) it requires no initial net investment or an initial net investment that is smaller than would be required for other types of contracts that would be expected to have a similar response to changes in market factors; and (c) its terms require or permit net settlement, it can readily be settled net by a means outside the contract, or it provides for delivery of an asset that puts the recipient in a position not substantially different from net settlement. Notwithstanding the above characteristics, loan commitments that relate to the origination of mortgage loans that will be held for sale are accounted for as derivative instruments by the issuer of the loan commitment (that is, the potential lender).",
        "label": "Derivative [Member]",
        "terseLabel": "Derivative [Member]"
       }
      }
     },
     "localname": "DerivativeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DerivativeNetLiabilityPositionAggregateFairValue": {
     "auth_ref": [
      "r495"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.",
        "label": "Derivative, Net Liability Position, Aggregate Fair Value",
        "verboseLabel": "Estimated Fair Value of Derivatives in Net Liability Position"
       }
      }
     },
     "localname": "DerivativeNetLiabilityPositionAggregateFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativeNotionalAmount": {
     "auth_ref": [
      "r465",
      "r467"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nominal or face amount used to calculate payment on derivative.",
        "label": "Derivative, Notional Amount",
        "terseLabel": "Derivative, Notional Amount"
       }
      }
     },
     "localname": "DerivativeNotionalAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DerivativesFairValueLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Derivatives, Fair Value [Line Items]",
        "terseLabel": "Derivatives, Fair Value [Line Items]"
       }
      }
     },
     "localname": "DerivativesFairValueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DerivativesPolicyTextBlock": {
     "auth_ref": [
      "r106",
      "r115",
      "r464",
      "r466",
      "r470",
      "r471",
      "r505"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for its derivative instruments and hedging activities.",
        "label": "Derivatives, Policy [Policy Text Block]",
        "verboseLabel": "Derivatives"
       }
      }
     },
     "localname": "DerivativesPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DescriptionOfLessorLeasingArrangementsCapitalLeases": {
     "auth_ref": [
      "r563",
      "r565",
      "r566"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A general description of the nature of the existing leasing arrangements of a lessor for all types of capital leases (sales-type, direct financing, leveraged) including, but not limited to: (1) unguaranteed residual values, if any, (2) restrictions imposed by lease arrangements; (3) unusual provisions or conditions; (4) contingent rentals, if any; and (5) lease expiration dates.",
        "label": "Description of Lessor Leasing Arrangements, Capital Leases",
        "terseLabel": "Loans and Leases Receivable, Other Information"
       }
      }
     },
     "localname": "DescriptionOfLessorLeasingArrangementsCapitalLeases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DesignatedAsHedgingInstrumentMember": {
     "auth_ref": [
      "r470"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument designated as hedging instrument under Generally Accepted Accounting Principles (GAAP).",
        "label": "Designated as Hedging Instrument [Member]",
        "terseLabel": "Designated as Hedging Instrument [Member]",
        "verboseLabel": "Derivatives Designated as Hedging Instruments:"
       }
      }
     },
     "localname": "DesignatedAsHedgingInstrumentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_DirectFinancingLeaseNetInvestmentInLease": {
     "auth_ref": [
      "r573"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net investment in direct financing lease.",
        "label": "Direct Financing Lease, Net Investment in Lease",
        "terseLabel": "Direct Financing Lease, Net Investment in Lease"
       }
      }
     },
     "localname": "DirectFinancingLeaseNetInvestmentInLease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DirectTaxesAndLicensesCosts": {
     "auth_ref": [
      "r71"
     ],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of tax incurred and cost of license directly related to good produced or service rendered.",
        "label": "Cost, Direct Tax and License",
        "terseLabel": "Premium taxes, other taxes, and licenses &amp; fees"
       }
      }
     },
     "localname": "DirectTaxesAndLicensesCosts",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DisaggregationOfRevenueLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Disaggregation of Revenue [Line Items]",
        "terseLabel": "Disaggregation of Revenue [Line Items]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DisaggregationOfRevenueTable": {
     "auth_ref": [
      "r309",
      "r310",
      "r311",
      "r312",
      "r313",
      "r314",
      "r315",
      "r316"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.",
        "label": "Disaggregation of Revenue [Table]",
        "terseLabel": "Disaggregation of Revenue [Table]"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_DisaggregationOfRevenueTableTextBlock": {
     "auth_ref": [
      "r309"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.",
        "label": "Disaggregation of Revenue [Table Text Block]",
        "terseLabel": "Disaggregation of Revenue"
       }
      }
     },
     "localname": "DisaggregationOfRevenueTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesandOtherExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DisclosureOfCreditDerivativesTextBlock": {
     "auth_ref": [
      "r497",
      "r502",
      "r503"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of credit derivatives which includes information by sellers of credit derivatives, about each credit derivative, or each group of similar credit derivatives, including (a) the nature of the credit derivative - its term, how it arose, the events or circumstances that would require the seller to perform under the credit derivative, and the current status of the payment/performance risk of the credit derivative; (b) the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative; (c) the current fair value of the credit derivative; and (d) the nature of any recourse provisions under the credit derivative, and any assets held either as collateral or by third parties. A credit derivative is a derivative instrument (1) in which one or more of its underlyings are related to the credit risk of a specified entity (or a group of entities) or an index based on the credit risk of a group of entities and (2) that exposes the seller to potential loss from credit-risk-related events specified in the contract. Examples of credit derivatives within the scope of this paragraph include, but are not limited to, credit default swaps, credit spread options, and credit index products; also includes a hybrid instrument that has an embedded credit derivative (for example, but not limited to, a credit-linked note).",
        "label": "Disclosure of Credit Derivatives [Table Text Block]",
        "verboseLabel": "Schedule of estimated fair value, maximum amount of future payments and weighted average years to maturity of written credit default swaps"
       }
      }
     },
     "localname": "DisclosureOfCreditDerivativesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_DividendsCommonStockCash": {
     "auth_ref": [
      "r306"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.",
        "label": "Dividends, Common Stock, Cash",
        "negatedLabel": "Dividends to MetLife, Inc."
       }
      }
     },
     "localname": "DividendsCommonStockCash",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_DomesticCorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r207",
      "r344",
      "r389"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt security issued by corporation domiciled in United States of America (US).",
        "label": "Debt Security, Corporate, US [Member]",
        "verboseLabel": "U.S. corporate"
       }
      }
     },
     "localname": "DomesticCorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations": {
     "auth_ref": [
      "r552"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies; attributable to disposal group, including, but not limited to, discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.",
        "label": "Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations",
        "terseLabel": "Effect of change in foreign currency exchange rates on cash and cash equivalents balances"
       }
      }
     },
     "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EffectiveIncomeTaxRateContinuingOperations": {
     "auth_ref": [
      "r421"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Effective Income Tax Rate Reconciliation, Percent",
        "terseLabel": "Effective Income Tax Rate Reconciliation, Percent"
       }
      }
     },
     "localname": "EffectiveIncomeTaxRateContinuingOperations",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/IncomeTaxNarrativeDetails"
     ],
     "xbrltype": "percentItemType"
    },
    "us-gaap_EffectsOfReinsuranceLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Effects of Reinsurance [Line Items]",
        "terseLabel": "Effects of Reinsurance [Line Items]"
       }
      }
     },
     "localname": "EffectsOfReinsuranceLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectsOfReinsuranceTable": {
     "auth_ref": [
      "r774"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about the effects of reinsurance, including, but not limited to, disclosure of direct, assumed, and ceded insurance.",
        "label": "Effects of Reinsurance [Table]",
        "terseLabel": "Effects of Reinsurance [Table]"
       }
      }
     },
     "localname": "EffectsOfReinsuranceTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EffectsOfReinsuranceTableTextBlock": {
     "auth_ref": [
      "r774"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the effects of reinsurance, for example, but not limited to, disclosure of direct, assumed, and ceded insurance.",
        "label": "Effects of Reinsurance [Table Text Block]",
        "verboseLabel": "Effects of reinsurance"
       }
      }
     },
     "localname": "EffectsOfReinsuranceTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_EmbeddedDerivativeAssetLiabilityNetMeasurementInput": {
     "auth_ref": [
      "r522"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of input used to measure net embedded derivative asset (liability).",
        "label": "Embedded Derivative Asset (Liability) Net, Measurement Input",
        "terseLabel": "Embedded Derivative Asset (Liability) Net, Measurement Input"
       }
      }
     },
     "localname": "EmbeddedDerivativeAssetLiabilityNetMeasurementInput",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "decimalItemType"
    },
    "us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability": {
     "auth_ref": [
      "r477"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.",
        "label": "Embedded Derivative, Fair Value of Embedded Derivative Liability",
        "terseLabel": "Embedded derivatives within liability host contracts",
        "verboseLabel": "Embedded Derivative, Fair Value of Embedded Derivative Liability"
       }
      }
     },
     "localname": "EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmbeddedDerivativeFinancialInstrumentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument embedded in host contract.",
        "label": "Embedded Derivative Financial Instruments [Member]",
        "terseLabel": "Net Embedded Derivatives",
        "verboseLabel": "Embedded derivatives direct and assumed guaranteed minimum benefits"
       }
      }
     },
     "localname": "EmbeddedDerivativeFinancialInstrumentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesTables",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet": {
     "auth_ref": [
      "r510"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.",
        "label": "Embedded Derivative, Gain (Loss) on Embedded Derivative, Net",
        "terseLabel": "Net derivatives gains (losses)",
        "verboseLabel": "Embedded derivative gains (losses)"
       }
      }
     },
     "localname": "EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesChangesinEstimatedFairValueRelatedtoEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EmployeeBenefitsAndShareBasedCompensation": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for employee benefit and equity-based compensation.",
        "label": "Employee Benefits and Share-based Compensation",
        "terseLabel": "Pension, postretirement and postemployment benefit costs"
       }
      }
     },
     "localname": "EmployeeBenefitsAndShareBasedCompensation",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_EquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Equity [Abstract]",
        "terseLabel": "Equity [Abstract]"
       }
      }
     },
     "localname": "EquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquityComponentDomain": {
     "auth_ref": [
      "r118",
      "r119",
      "r120",
      "r123",
      "r131",
      "r133",
      "r141",
      "r237",
      "r305",
      "r306",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428",
      "r553",
      "r554",
      "r555",
      "r556",
      "r557",
      "r559",
      "r756",
      "r757",
      "r758"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.",
        "label": "Equity Component [Domain]",
        "terseLabel": "Equity Component [Domain]"
       }
      }
     },
     "localname": "EquityComponentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquityContractMember": {
     "auth_ref": [
      "r344",
      "r486"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is tied to share prices.",
        "label": "Equity Contract [Member]",
        "verboseLabel": "Equity market contracts"
       }
      }
     },
     "localname": "EquityContractMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesByIndustryAxis": {
     "auth_ref": [
      "r260"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by industry sector, examples include but are not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.",
        "label": "Industry Sector [Axis]",
        "terseLabel": "Industry Sector [Axis]"
       }
      }
     },
     "localname": "EquitySecuritiesByIndustryAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_EquitySecuritiesIndustryMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Industry sector consisting of government, private and corporate entities engaged in business activities, including but not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.",
        "label": "Industry Sector [Domain]",
        "terseLabel": "Industry Sector [Domain]"
       }
      }
     },
     "localname": "EquitySecuritiesIndustryMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EquitySecuritiesMember": {
     "auth_ref": [
      "r3",
      "r7",
      "r227",
      "r685",
      "r821",
      "r822",
      "r823"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.",
        "label": "Equity Securities [Member]",
        "verboseLabel": "Equity securities"
       }
      }
     },
     "localname": "EquitySecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_EstimateOfFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r536"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured as an estimate of fair value.",
        "label": "Estimate of Fair Value Measurement [Member]",
        "terseLabel": "Estimated Fair Value"
       }
      }
     },
     "localname": "EstimateOfFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ExcessOfReportedClosedBlockLiabilitiesOverAssetsDesignatedToClosedBlock": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "calculation": {
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_ClosedBlockAssetsAndLiabilitiesMaximumFutureEarningsToBeRecognized",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the liabilities of and the assets allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.",
        "label": "Excess of Reported Closed Block Liabilities over Assets Designated to Closed Block",
        "totalLabel": "Excess of closed block liabilities over assets designated to the closed block"
       }
      }
     },
     "localname": "ExcessOfReportedClosedBlockLiabilitiesOverAssetsDesignatedToClosedBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockLiabilitiesandAssetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ExchangeClearedMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Transaction where an organization acts as an intermediary, reconciling orders between transacting parties.",
        "label": "Exchange Cleared [Member]",
        "verboseLabel": "Cleared [Member]"
       }
      }
     },
     "localname": "ExchangeClearedMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ExchangeTradedMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Transaction that takes place on an organized exchange.",
        "label": "Exchange Traded [Member]",
        "terseLabel": "Exchange Traded [Member]"
       }
      }
     },
     "localname": "ExchangeTradedMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ExternalCreditRatingByGroupingAxis": {
     "auth_ref": [
      "r195",
      "r257",
      "r300",
      "r499"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by external rating classified as investment grade or non investment grade.",
        "label": "External Credit Rating by Grouping [Axis]",
        "terseLabel": "External Credit Rating by Grouping [Axis]"
       }
      }
     },
     "localname": "ExternalCreditRatingByGroupingAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ExternalCreditRatingByGroupingDomain": {
     "auth_ref": [
      "r299",
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "External credit rating classified as investment grade or non-investment grade.",
        "label": "External Credit Rating by Grouping [Domain]",
        "terseLabel": "External Credit Rating by Grouping [Domain]"
       }
      }
     },
     "localname": "ExternalCreditRatingByGroupingDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ExternalCreditRatingInvestmentGradeMember": {
     "auth_ref": [
      "r299",
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "External credit-rating that could be used to describe the current status of the payment and performance risk of credit derivatives and guarantee obligations that connote investment grade.",
        "label": "External Credit Rating, Investment Grade [Member]",
        "terseLabel": "Investment Grade"
       }
      }
     },
     "localname": "ExternalCreditRatingInvestmentGradeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ExternalCreditRatingNonInvestmentGradeMember": {
     "auth_ref": [
      "r299",
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "External credit-rating that could be used to describe the current status of the payment and performance risk of credit derivatives and guarantee obligations that connote non-investment grade.",
        "label": "External Credit Rating, Non Investment Grade [Member]",
        "terseLabel": "Below Investment Grade"
       }
      }
     },
     "localname": "ExternalCreditRatingNonInvestmentGradeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetLiabilityRecurringBasisStillHeldUnrealizedGainLossOci": {
     "auth_ref": [
      "r528"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unrealized gain (loss) recognized in other comprehensive income (OCI) from asset (liability) measured at fair value on recurring basis using unobservable input (level 3) and still held.",
        "label": "Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI",
        "terseLabel": "Changes in unrealized gains (losses) included in AOCI for the instruments still held at end of period"
       }
      }
     },
     "localname": "FairValueAssetLiabilityRecurringBasisStillHeldUnrealizedGainLossOci",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": {
     "auth_ref": [
      "r517",
      "r518",
      "r519",
      "r532"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.",
        "label": "Fair Value, Recurring and Nonrecurring [Table]",
        "terseLabel": "Fair Value, Recurring and Nonrecurring [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table]",
        "terseLabel": "Fair Value Measurement Inputs and Valuation Techniques [Table]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.",
        "label": "Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]",
        "verboseLabel": "Fair Value Inputs, Quantitative Information"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]",
        "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]"
       }
      }
     },
     "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock": {
     "auth_ref": [
      "r517",
      "r518",
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).",
        "label": "Fair Value Measurements, Nonrecurring [Table Text Block]",
        "terseLabel": "Fair Value Measurements, Nonrecurring"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnNonrecurringBasisTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss": {
     "auth_ref": [
      "r528"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.",
        "label": "Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)",
        "terseLabel": "Changes in unrealized gains (losses) included in net income (loss) for the instruments still held at end of period"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain": {
     "auth_ref": [
      "r523"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Class of asset.",
        "label": "Asset Class [Domain]",
        "terseLabel": "Asset Class [Domain]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable": {
     "auth_ref": [
      "r523",
      "r532"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets using significant unobservable inputs (level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include, but is not limited to: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]",
        "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": {
     "auth_ref": [
      "r523",
      "r532"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.",
        "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]",
        "terseLabel": "Fair Value, Measured on Recurring Basis, Unobservable Input Reconciliation"
       }
      }
     },
     "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]",
        "terseLabel": "Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]"
       }
      }
     },
     "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByAssetClassAxis": {
     "auth_ref": [
      "r517",
      "r532"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by class of asset.",
        "label": "Asset Class [Axis]",
        "terseLabel": "Asset Class [Axis]"
       }
      }
     },
     "localname": "FairValueByAssetClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTable": {
     "auth_ref": [
      "r517",
      "r537",
      "r538"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.",
        "label": "Fair Value, by Balance Sheet Grouping [Table]",
        "terseLabel": "Fair Value, by Balance Sheet Grouping [Table]"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByBalanceSheetGroupingTextBlock": {
     "auth_ref": [
      "r517",
      "r537"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.",
        "label": "Fair Value, by Balance Sheet Grouping [Table Text Block]",
        "verboseLabel": "Fair Value of Financial Instruments Carried at Other Than Fair Value"
       }
      }
     },
     "localname": "FairValueByBalanceSheetGroupingTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueByFairValueHierarchyLevelAxis": {
     "auth_ref": [
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r389",
      "r518",
      "r586",
      "r587",
      "r588"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.",
        "label": "Fair Value Hierarchy and NAV [Axis]",
        "terseLabel": "Fair Value Hierarchy and NAV [Axis]"
       }
      }
     },
     "localname": "FairValueByFairValueHierarchyLevelAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementBasisAxis": {
     "auth_ref": [
      "r517",
      "r533"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement basis.",
        "label": "Measurement Basis [Axis]",
        "terseLabel": "Measurement Basis [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementBasisAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueByMeasurementFrequencyAxis": {
     "auth_ref": [
      "r517",
      "r518",
      "r521",
      "r522",
      "r534"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by measurement frequency.",
        "label": "Measurement Frequency [Axis]",
        "terseLabel": "Measurement Frequency [Axis]"
       }
      }
     },
     "localname": "FairValueByMeasurementFrequencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueConcentrationOfRiskInvestments": {
     "auth_ref": [
      "r539"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.",
        "label": "Fair Value, Concentration of Risk, Investments",
        "terseLabel": "Fair Value, Concentration of Risk, Investments"
       }
      }
     },
     "localname": "FairValueConcentrationOfRiskInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConcentrationsofCreditRiskNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueDisclosureItemAmountsDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.",
        "label": "Fair Value Measurement [Domain]",
        "terseLabel": "Fair Value Measurement [Domain]"
       }
      }
     },
     "localname": "FairValueDisclosureItemAmountsDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.",
        "label": "Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability",
        "terseLabel": "Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability"
       }
      }
     },
     "localname": "FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Fair Value Disclosures [Abstract]",
        "terseLabel": "Fair Value Disclosures [Abstract]"
       }
      }
     },
     "localname": "FairValueDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueDisclosuresTextBlock": {
     "auth_ref": [
      "r530"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.",
        "label": "Fair Value Disclosures [Text Block]",
        "verboseLabel": "Fair Value"
       }
      }
     },
     "localname": "FairValueDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValue"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValueHedgingMember": {
     "auth_ref": [
      "r468"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A hedge of the exposure to changes in the fair value of a recognized asset or liability, or of an unrecognized firm commitment, that are attributable to a particular risk.",
        "label": "Fair Value Hedging [Member]",
        "terseLabel": "Fair Value Hedging [Member]",
        "verboseLabel": "Fair Value Hedges [Member]"
       }
      }
     },
     "localname": "FairValueHedgingMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel1Member": {
     "auth_ref": [
      "r344",
      "r346",
      "r351",
      "r389",
      "r518",
      "r586"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.",
        "label": "Fair Value, Inputs, Level 1 [Member]",
        "verboseLabel": "Level\u00a01"
       }
      }
     },
     "localname": "FairValueInputsLevel1Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel2Member": {
     "auth_ref": [
      "r344",
      "r346",
      "r351",
      "r389",
      "r518",
      "r587"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.",
        "label": "Fair Value, Inputs, Level 2 [Member]",
        "verboseLabel": "Level\u00a02"
       }
      }
     },
     "localname": "FairValueInputsLevel2Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueInputsLevel3Member": {
     "auth_ref": [
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r389",
      "r518",
      "r588"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Inputs, Level 3 [Member]",
        "terseLabel": "Fair Value, Inputs, Level 3 [Member]",
        "verboseLabel": "Level\u00a03"
       }
      }
     },
     "localname": "FairValueInputsLevel3Member",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementFrequencyDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement frequency.",
        "label": "Measurement Frequency [Domain]",
        "terseLabel": "Measurement Frequency [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementFrequencyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1": {
     "auth_ref": [
      "r524"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings",
        "verboseLabel": "Total realized/unrealized gains (losses) included in net income (loss)"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss": {
     "auth_ref": [
      "r525"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)",
        "verboseLabel": "Total realized/unrealized gains (losses) included in AOCI"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues": {
     "auth_ref": [
      "r526"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of issuances of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances",
        "verboseLabel": "Issuances"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": {
     "auth_ref": [
      "r526"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases",
        "verboseLabel": "Purchases"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales": {
     "auth_ref": [
      "r526"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales",
        "negatedLabel": "Sales"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements": {
     "auth_ref": [
      "r526"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3": {
     "auth_ref": [
      "r527"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3",
        "verboseLabel": "Transfers into Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3": {
     "auth_ref": [
      "r527"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3",
        "negatedLabel": "Transfers out of Level 3"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": {
     "auth_ref": [
      "r523"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period"
       }
      }
     },
     "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": {
     "auth_ref": [
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r389",
      "r586",
      "r587",
      "r588"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.",
        "label": "Fair Value Hierarchy and NAV [Domain]",
        "terseLabel": "Fair Value Hierarchy and NAV [Domain]"
       }
      }
     },
     "localname": "FairValueMeasurementsFairValueHierarchyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsNonrecurringMember": {
     "auth_ref": [
      "r517",
      "r518",
      "r521",
      "r522",
      "r529",
      "r534"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Infrequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, not frequently measured at fair value.",
        "label": "Fair Value, Nonrecurring [Member]",
        "terseLabel": "Fair Value, Nonrecurring"
       }
      }
     },
     "localname": "FairValueMeasurementsNonrecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueMeasurementsRecurringMember": {
     "auth_ref": [
      "r530",
      "r534"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Frequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, frequently measured at fair value.",
        "label": "Fair Value, Recurring [Member]",
        "verboseLabel": "Recurring"
       }
      }
     },
     "localname": "FairValueMeasurementsRecurringMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]",
        "terseLabel": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings": {
     "auth_ref": [
      "r524",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings",
        "terseLabel": "Total realized/unrealized gains (losses) included in net income (loss)"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss": {
     "auth_ref": [
      "r525",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) recognized in other comprehensive income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3).",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)",
        "terseLabel": "Total realized/unrealized gains (losses) included in AOCI"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues": {
     "auth_ref": [
      "r526",
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of issuances of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Issues",
        "terseLabel": "Issuances"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases": {
     "auth_ref": [
      "r526",
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of purchases of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases",
        "terseLabel": "Purchases"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSales": {
     "auth_ref": [
      "r526",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of sales of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales",
        "negatedLabel": "Sales"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSales",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements": {
     "auth_ref": [
      "r526",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of settlements of financial instrument classified as a derivative asset (liability) after deduction of derivative liability, measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements",
        "negatedLabel": "Settlements"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3": {
     "auth_ref": [
      "r527",
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into level 3 of the fair value hierarchy.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3",
        "terseLabel": "Transfers into Level 3"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3": {
     "auth_ref": [
      "r527",
      "r531"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of transfers of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset) out of level 3 of the fair value hierarchy.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers out of Level 3",
        "negatedLabel": "Transfers out of Level 3"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs": {
     "auth_ref": [
      "r517",
      "r531"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "label": "Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs",
        "periodEndLabel": "Balance, end of period",
        "periodStartLabel": "Balance, beginning of period"
       }
      }
     },
     "localname": "FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]",
        "terseLabel": "Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]"
       }
      }
     },
     "localname": "FairValueOffBalanceSheetRisksDisclosureInformationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueOptionAggregateDifferencesLoansAndLongTermReceivables": {
     "auth_ref": [
      "r541"
     ],
     "calculation": {
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails": {
       "order": 2.0,
       "parentTag": "mlic_InvestmentinMortgageLoansonRealEstate",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.",
        "label": "Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables",
        "terseLabel": "Difference between estimated fair value and unpaid principal balance"
       }
      }
     },
     "localname": "FairValueOptionAggregateDifferencesLoansAndLongTermReceivables",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueOptionLoansHeldAsAssets90DaysOrMorePastDue": {
     "auth_ref": [
      "r542"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.",
        "label": "Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due",
        "terseLabel": "Loans more than 90 days past due"
       }
      }
     },
     "localname": "FairValueOptionLoansHeldAsAssets90DaysOrMorePastDue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference": {
     "auth_ref": [
      "r544"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due.",
        "label": "Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due, Aggregate Difference",
        "terseLabel": "Loans in nonaccrual status or more than 90 days past due, or both \u2014 difference between aggregate estimated fair value and unpaid principal balance"
       }
      }
     },
     "localname": "FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus": {
     "auth_ref": [
      "r543"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.",
        "label": "Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status",
        "verboseLabel": "Loans in nonaccrual status"
       }
      }
     },
     "localname": "FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FairValueOptionQuantitativeDisclosuresLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Fair Value, Option, Quantitative Disclosures [Line Items]",
        "terseLabel": "Fair Value, Option, Quantitative Disclosures [Line Items]"
       }
      }
     },
     "localname": "FairValueOptionQuantitativeDisclosuresLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueOptionQuantitativeDisclosuresTable": {
     "auth_ref": [
      "r547",
      "r548",
      "r549"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about asset and liability measured at fair value under fair value option.",
        "label": "Fair Value Option, Disclosures [Table]",
        "terseLabel": "Fair Value Option, Disclosures [Table]"
       }
      }
     },
     "localname": "FairValueOptionQuantitativeDisclosuresTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock": {
     "auth_ref": [
      "r546",
      "r547",
      "r548",
      "r549"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of information about asset and liability measured at fair value under fair value option.",
        "label": "Fair Value Option, Disclosures [Table Text Block]",
        "terseLabel": "Fair Value Option"
       }
      }
     },
     "localname": "FairValueOptionQuantitativeDisclosuresTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable": {
     "auth_ref": [
      "r472",
      "r480",
      "r509"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule that discloses the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.",
        "label": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]",
        "terseLabel": "Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]"
       }
      }
     },
     "localname": "FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FederalHomeLoanBankStock": {
     "auth_ref": [
      "r676"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).",
        "label": "Federal Home Loan Bank Stock",
        "terseLabel": "Federal Home Loan Bank Stock"
       }
      }
     },
     "localname": "FederalHomeLoanBankStock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositsandPledgedasCollateralNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancialInstrumentAxis": {
     "auth_ref": [
      "r219",
      "r220",
      "r243",
      "r246",
      "r247",
      "r251",
      "r257",
      "r268",
      "r270",
      "r277",
      "r278",
      "r583",
      "r584",
      "r585",
      "r586",
      "r587",
      "r588",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r595",
      "r597",
      "r603",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r611",
      "r612",
      "r613",
      "r614",
      "r615",
      "r616",
      "r617",
      "r618",
      "r619"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of financial instrument.",
        "label": "Financial Instrument [Axis]",
        "terseLabel": "Financial Instrument [Axis]"
       }
      }
     },
     "localname": "FinancialInstrumentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]",
        "verboseLabel": "Assets"
       }
      }
     },
     "localname": "FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]",
        "verboseLabel": "Liabilities"
       }
      }
     },
     "localname": "FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivableAllowanceForCreditLosses": {
     "auth_ref": [
      "r191",
      "r240",
      "r244",
      "r245",
      "r648"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.",
        "label": "Financing Receivable, Allowance for Credit Loss",
        "negatedLabel": "Allowance for Credit Loss"
       }
      }
     },
     "localname": "FinancingReceivableAllowanceForCreditLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableChangeInMethodCreditLossExpenseReversal": {
     "auth_ref": [
      "r241"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of credit loss expense (reversal of expense) for financing receivable from change in methodology.",
        "label": "Financing Receivable, Change in Method, Credit Loss Expense (Reversal)",
        "terseLabel": "Adoption of new credit loss guidance"
       }
      }
     },
     "localname": "FinancingReceivableChangeInMethodCreditLossExpenseReversal",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock": {
     "auth_ref": [
      "r195",
      "r257"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.",
        "label": "Financing Receivable Credit Quality Indicators [Table Text Block]",
        "terseLabel": "Disclosure of the mortgage loans portfolio segment by the recorded investment, prior to valuation allowances, by credit quality indicator categories"
       }
      }
     },
     "localname": "FinancingReceivableCreditQualityIndicatorsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_FinancingReceivableNonaccrualNoAllowance": {
     "auth_ref": [
      "r250"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable on nonaccrual status with no allowance for credit loss.",
        "label": "Financing Receivable, Nonaccrual, No Allowance",
        "terseLabel": "Financing Receivable, Nonaccrual, No Allowance"
       }
      }
     },
     "localname": "FinancingReceivableNonaccrualNoAllowance",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated more than five years prior to current fiscal year.",
        "label": "Financing Receivable, Originated, More than Five Years before Current Fiscal Year",
        "terseLabel": "Financing Receivable, Originated, More than Five Years before Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated four years prior to current fiscal year.",
        "label": "Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year",
        "terseLabel": "Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated in current fiscal year.",
        "label": "Financing Receivable, Year One, Originated, Current Fiscal Year",
        "terseLabel": "Financing Receivable, Year One, Originated, Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedInCurrentFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated in fiscal year prior to current fiscal year.",
        "label": "Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year",
        "terseLabel": "Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated three years prior to current fiscal year.",
        "label": "Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year",
        "terseLabel": "Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable originated two years prior to current fiscal year.",
        "label": "Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year",
        "terseLabel": "Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year"
       }
      }
     },
     "localname": "FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivablePortfolioSegmentAxis": {
     "auth_ref": [
      "r243",
      "r246",
      "r259"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.",
        "label": "Financing Receivable Portfolio Segment [Axis]",
        "terseLabel": "Financing Receivable Portfolio Segment [Axis]"
       }
      }
     },
     "localname": "FinancingReceivablePortfolioSegmentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_FinancingReceivablePortfolioSegmentDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.",
        "label": "Financing Receivable Portfolio Segment [Domain]",
        "terseLabel": "Financing Receivable Portfolio Segment [Domain]"
       }
      }
     },
     "localname": "FinancingReceivablePortfolioSegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate": {
     "auth_ref": [
      "r253"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration.",
        "label": "Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date",
        "negatedLabel": "ACL at Acquisition",
        "terseLabel": "Initial credit losses on PCD loans (1)"
       }
      }
     },
     "localname": "FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue": {
     "auth_ref": [
      "r255"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount at par value of financing receivable purchased with credit deterioration.",
        "label": "Financing Receivable, Purchased with Credit Deterioration, Amount at Par Value",
        "terseLabel": "Purchase Price"
       }
      }
     },
     "localname": "FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice": {
     "auth_ref": [
      "r252"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount at purchase price of financing receivable purchased with credit deterioration.",
        "label": "Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price",
        "terseLabel": "Contractual Principal"
       }
      }
     },
     "localname": "FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium": {
     "auth_ref": [
      "r254"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration.",
        "label": "Financing Receivable, Purchased with Credit Deterioration, Discount (Premium)",
        "negatedTerseLabel": "Non-Credit (Discount) Premium"
       }
      }
     },
     "localname": "FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing": {
     "auth_ref": [
      "r199",
      "r249",
      "r263"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable 90 days or more past due and still accruing.",
        "label": "Financing Receivable, 90 Days or More Past Due, Still Accruing",
        "terseLabel": "Greater than 90 Days Past Due and Still Accruing Interest"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus": {
     "auth_ref": [
      "r198",
      "r248"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable on nonaccrual status.",
        "label": "Financing Receivable, Nonaccrual",
        "terseLabel": "Financing Receivable, Nonaccrual"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentNonaccrualStatus",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRecordedInvestmentPastDue": {
     "auth_ref": [
      "r201",
      "r247",
      "r263"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable past due.",
        "label": "Financing Receivable, Past Due",
        "terseLabel": "Past Due"
       }
      }
     },
     "localname": "FinancingReceivableRecordedInvestmentPastDue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableRevolving": {
     "auth_ref": [
      "r258",
      "r262"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of financing receivable that can be withdrawn, repaid and redrawn.",
        "label": "Financing Receivable, Revolving",
        "terseLabel": "Financing Receivable, Revolving"
       }
      }
     },
     "localname": "FinancingReceivableRevolving",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FinancingReceivableSignificantPurchases": {
     "auth_ref": [
      "r193",
      "r242"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase from purchase of financing receivable.",
        "label": "Financing Receivable, Purchase",
        "terseLabel": "Financing Receivable, Purchase"
       }
      }
     },
     "localname": "FinancingReceivableSignificantPurchases",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_FixedMaturitiesMember": {
     "auth_ref": [
      "r784"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element provides types of investments that may be contained within the fixed maturity category which are securities having a stated final repayment date. Examples of items within this category may include bonds, including convertibles and bonds with warrants, and redeemable preferred stocks.",
        "label": "Fixed Maturities [Member]",
        "terseLabel": "Fixed maturity securities AFS",
        "verboseLabel": "Fixed Maturities [Member]"
       }
      }
     },
     "localname": "FixedMaturitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCorporateDebtSecuritiesMember": {
     "auth_ref": [
      "r207",
      "r344"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt security issued by corporation not domiciled in United States of America (US).",
        "label": "Debt Security, Corporate, Non-US [Member]",
        "terseLabel": "Foreign corporate",
        "verboseLabel": "Foreign corporate"
       }
      }
     },
     "localname": "ForeignCorporateDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCurrencyGainLossMember": {
     "auth_ref": [
      "r488"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing foreign currency gain (loss).",
        "label": "Foreign Currency Gain (Loss) [Member]",
        "terseLabel": "Foreign Currency Gain (Loss) [Member]"
       }
      }
     },
     "localname": "ForeignCurrencyGainLossMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignCurrencyTransactionGainLossRealized": {
     "auth_ref": [
      "r550",
      "r551"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.",
        "label": "Foreign Currency Transaction Gain (Loss), Realized",
        "verboseLabel": "Foreign Currency Transaction Gain (Loss) - Realized"
       }
      }
     },
     "localname": "ForeignCurrencyTransactionGainLossRealized",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentGainsLossesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ForeignExchangeContractMember": {
     "auth_ref": [
      "r344",
      "r485"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is tied to foreign exchange rates.",
        "label": "Foreign Exchange Contract [Member]",
        "terseLabel": "Foreign currency exchange rate contracts",
        "verboseLabel": "Foreign currency exchange rate contracts"
       }
      }
     },
     "localname": "ForeignExchangeContractMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignExchangeForwardMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Foreign exchange forward traded on an exchange (examples include but are not limited to the International Securities Exchange, Philadelphia Stock Exchange, or the Chicago Mercantile Exchange) for options or future contracts to buy or sell a certain currency, at a specified date, at a fixed exercise exchange rate.",
        "label": "Foreign Exchange Forward [Member]",
        "verboseLabel": "Foreign currency forwards"
       }
      }
     },
     "localname": "ForeignExchangeForwardMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignExchangeMember": {
     "auth_ref": [
      "r494"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Trading of derivative or nonderivative instruments whose primary underlying risk is tied to foreign exchange rates.",
        "label": "Foreign Exchange [Member]",
        "terseLabel": "Foreign Exchange [Member]"
       }
      }
     },
     "localname": "ForeignExchangeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForeignGovernmentDebtSecuritiesMember": {
     "auth_ref": [
      "r344",
      "r783"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Debt security issued by government not domiciled in United States of America (US).",
        "label": "Debt Security, Government, Non-US [Member]",
        "terseLabel": "Foreign government"
       }
      }
     },
     "localname": "ForeignGovernmentDebtSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ForwardContractsMember": {
     "auth_ref": [
      "r483"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts negotiated between two parties to purchase and sell a specific quantity of a financial instrument, foreign currency, or commodity at a price specified at origination of the contract, with delivery and settlement at a specified future date.",
        "label": "Forward Contracts [Member]",
        "verboseLabel": "Interest rate forwards"
       }
      }
     },
     "localname": "ForwardContractsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GainLossOnDerivativeInstrumentsNetPretax": {
     "auth_ref": [
      "r473"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.",
        "label": "Gain (Loss) on Derivative Instruments, Net, Pretax",
        "verboseLabel": "Net derivative gains (losses)"
       }
      }
     },
     "localname": "GainLossOnDerivativeInstrumentsNetPretax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet": {
     "auth_ref": [
      "r515"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period.",
        "label": "Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net",
        "terseLabel": "Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net",
        "verboseLabel": "Net amounts reclassified into net derivatives gains (losses) on discontinued cash flow hedges"
       }
      }
     },
     "localname": "GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnInvestments": {
     "auth_ref": [
      "r78",
      "r100",
      "r206"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of realized and unrealized gain (loss) on investment.",
        "label": "Gain (Loss) on Investments",
        "terseLabel": "Net\u00a0investment\u00a0gains\u00a0(losses)",
        "verboseLabel": "Total net investment gains (losses)"
       }
      }
     },
     "localname": "GainLossOnInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnInvestmentsTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of realized and unrealized gain (loss) on investment in security.",
        "label": "Gain (Loss) on Securities [Table Text Block]",
        "verboseLabel": "Components of Net Investment Gains (Losses)"
       }
      }
     },
     "localname": "GainLossOnInvestmentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_GainLossOnSaleOfDebtInvestments": {
     "auth_ref": [
      "r100"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the carrying value and the sale price of debt securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale.",
        "label": "Gain (Loss) on Sale of Debt Investments",
        "verboseLabel": "Fixed maturity securities AFS - net gains (losses) on sales and disposals"
       }
      }
     },
     "localname": "GainLossOnSaleOfDebtInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfEquityInvestments": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.",
        "label": "Gain (Loss) on Sale of Equity Investments",
        "verboseLabel": "Equity securities - net gains (losses) on sales and disposals"
       }
      }
     },
     "localname": "GainLossOnSaleOfEquityInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfInvestments": {
     "auth_ref": [
      "r100"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.",
        "label": "Gain (Loss) on Sale of Investments",
        "verboseLabel": "Other (3), (4)"
       }
      }
     },
     "localname": "GainLossOnSaleOfInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSaleOfOtherAssets": {
     "auth_ref": [
      "r100"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) on sale or disposal of other assets.",
        "label": "Gain (Loss) on Disposition of Other Assets",
        "terseLabel": "Non-investment portfolio gains (losses)"
       }
      }
     },
     "localname": "GainLossOnSaleOfOtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSalesOfLoansNet": {
     "auth_ref": [
      "r100",
      "r666",
      "r722"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.",
        "label": "Gain (Loss) on Sales of Loans, Net",
        "verboseLabel": "Mortgage loans"
       }
      }
     },
     "localname": "GainLossOnSalesOfLoansNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnSecuritizationOfFinancialAssets": {
     "auth_ref": [
      "r72",
      "r73",
      "r100",
      "r585",
      "r657",
      "r716"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A gain (loss) realized on a transfer, accounted for as a sale, of all or a portion of financial assets in which the transferor surrenders control and receives consideration other than a beneficial interest in the assets transferred. Reflects the amount of sales proceeds in excess of, or deficient from, the sum of the carrying amounts of transferred financial assets plus transaction costs.",
        "label": "Gain (Loss) on Securitization of Financial Assets",
        "terseLabel": "Gain (Loss) on Securitization of Financial Assets"
       }
      }
     },
     "localname": "GainLossOnSecuritizationOfFinancialAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainLossOnTerminationOfLease": {
     "auth_ref": [
      "r567"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of gain (loss) on termination of lease before expiration of lease term.",
        "label": "Gain (Loss) on Termination of Lease",
        "terseLabel": "Gain (Loss) on Termination of Lease"
       }
      }
     },
     "localname": "GainLossOnTerminationOfLease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GainsLossesOnSalesOfInvestmentRealEstate": {
     "auth_ref": [
      "r72",
      "r73",
      "r100",
      "r658",
      "r716",
      "r734",
      "r735",
      "r736"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.",
        "label": "Gains (Losses) on Sales of Investment Real Estate",
        "verboseLabel": "Real estate and real estate joint ventures"
       }
      }
     },
     "localname": "GainsLossesOnSalesOfInvestmentRealEstate",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GeneralAndAdministrativeExpense": {
     "auth_ref": [
      "r76"
     ],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.",
        "label": "General and Administrative Expense",
        "terseLabel": "General and administrative expenses (1)"
       }
      }
     },
     "localname": "GeneralAndAdministrativeExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GrossInvestmentIncomeOperating": {
     "auth_ref": [
      "r721"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.",
        "label": "Gross Investment Income, Operating",
        "terseLabel": "Gross Investment Income, Operating"
       }
      }
     },
     "localname": "GrossInvestmentIncomeOperating",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsCurrentCarryingValue": {
     "auth_ref": [
      "r302"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.",
        "label": "Guarantor Obligations, Current Carrying Value",
        "verboseLabel": "Liabilities for indemnities, guarantees and commitments"
       }
      }
     },
     "localname": "GuaranteeObligationsCurrentCarryingValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteeObligationsMaximumExposure": {
     "auth_ref": [
      "r301"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.",
        "label": "Guarantor Obligations, Maximum Exposure, Undiscounted",
        "verboseLabel": "Cumulative maximum indemnities and guarantees contractual limitation"
       }
      }
     },
     "localname": "GuaranteeObligationsMaximumExposure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfBenefitAxis": {
     "auth_ref": [
      "r680",
      "r748",
      "r779"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by benefit for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Benefit [Axis]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Benefit [Axis]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfBenefitAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfBenefitDomain": {
     "auth_ref": [
      "r680",
      "r748",
      "r779"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Benefit for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Benefit [Domain]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Benefit [Domain]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfBenefitDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfGuaranteeAxis": {
     "auth_ref": [
      "r680",
      "r748",
      "r781"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by guarantee for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Guarantee [Axis]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Guarantee [Axis]",
        "verboseLabel": "Liabilities for Guarantees on Long-Duration Contracts, Guarantee Type [Axis]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfGuaranteeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_GuaranteedInsuranceContractTypeOfGuaranteeDomain": {
     "auth_ref": [
      "r680",
      "r748",
      "r779"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Guarantee for guaranteed benefit obligations in traditional and nontraditional long-duration contracts with policy and contract holders.",
        "label": "Guaranteed Insurance Contract, Type of Guarantee [Domain]",
        "terseLabel": "Guaranteed Insurance Contract, Type of Guarantee [Domain]",
        "verboseLabel": "Guaranteed Insurance Contract, Type of Guarantee [Domain]"
       }
      }
     },
     "localname": "GuaranteedInsuranceContractTypeOfGuaranteeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_GuaranteedMinimumDeathBenefitMember": {
     "auth_ref": [
      "r680",
      "r748",
      "r780"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Feature in an insurance contract that guarantees a minimum amount that will be payable upon the death of the insured.",
        "label": "Guaranteed Minimum Death Benefit [Member]",
        "verboseLabel": "Guaranteed Death Benefits"
       }
      }
     },
     "localname": "GuaranteedMinimumDeathBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease": {
     "auth_ref": [
      "r492"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge.",
        "label": "Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)",
        "terseLabel": "Hedged Asset, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)"
       }
      }
     },
     "localname": "HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HedgedAssetFairValueHedgeCumulativeIncreaseDecrease": {
     "auth_ref": [
      "r491"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk.",
        "label": "Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)",
        "terseLabel": "Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)"
       }
      }
     },
     "localname": "HedgedAssetFairValueHedgeCumulativeIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_HedgingDesignationAxis": {
     "auth_ref": [
      "r470",
      "r490"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by designation of purpose of derivative instrument.",
        "label": "Hedging Designation [Axis]",
        "terseLabel": "Hedging Designation [Axis]"
       }
      }
     },
     "localname": "HedgingDesignationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_HedgingDesignationDomain": {
     "auth_ref": [
      "r470"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Designation of purpose of derivative instrument.",
        "label": "Hedging Designation [Domain]",
        "terseLabel": "Hedging Designation [Domain]"
       }
      }
     },
     "localname": "HedgingDesignationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_HedgingRelationshipDomain": {
     "auth_ref": [
      "r470"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Nature or intent of a hedge.",
        "label": "Hedging Relationship [Domain]",
        "terseLabel": "Hedging Relationship [Domain]"
       }
      }
     },
     "localname": "HedgingRelationshipDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": {
     "auth_ref": [
      "r65",
      "r165",
      "r171",
      "r175",
      "r178",
      "r181",
      "r637",
      "r659",
      "r667",
      "r719"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.",
        "label": "Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest",
        "totalLabel": "Income (loss) before provision for income tax",
        "verboseLabel": "Income (loss) before provision for income tax"
       }
      }
     },
     "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeLossFromEquityMethodInvestments": {
     "auth_ref": [
      "r66",
      "r100",
      "r162",
      "r228",
      "r656",
      "r710"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of income (loss) for proportionate share of equity method investee's income (loss).",
        "label": "Income (Loss) from Equity Method Investments",
        "terseLabel": "Income (Loss) from Equity Method Investments"
       }
      }
     },
     "localname": "IncomeLossFromEquityMethodInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeStatementAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Statement [Abstract]",
        "terseLabel": "Income Statement [Abstract]"
       }
      }
     },
     "localname": "IncomeStatementAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationAxis": {
     "auth_ref": [
      "r281"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by location in the income statement.",
        "label": "Income Statement Location [Axis]",
        "terseLabel": "Income Statement Location [Axis]"
       }
      }
     },
     "localname": "IncomeStatementLocationAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesChangesinEstimatedFairValueRelatedtoEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeStatementLocationDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Location in the income statement.",
        "label": "Income Statement Location [Domain]",
        "terseLabel": "Income Statement Location [Domain]"
       }
      }
     },
     "localname": "IncomeStatementLocationDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesChangesinEstimatedFairValueRelatedtoEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_IncomeTaxDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Income Tax Disclosure [Abstract]",
        "terseLabel": "Income Tax Disclosure [Abstract]"
       }
      }
     },
     "localname": "IncomeTaxDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_IncomeTaxDisclosureTextBlock": {
     "auth_ref": [
      "r422",
      "r423",
      "r424",
      "r429",
      "r431",
      "r433",
      "r434",
      "r435"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.",
        "label": "Income Tax Disclosure [Text Block]",
        "verboseLabel": "Income Tax"
       }
      }
     },
     "localname": "IncomeTaxDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/IncomeTax"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_IncomeTaxExpenseBenefit": {
     "auth_ref": [
      "r109",
      "r132",
      "r133",
      "r163",
      "r420",
      "r430",
      "r432",
      "r720"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_ProfitLoss",
       "weight": -1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 3.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": -1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.",
        "label": "Income Tax Expense (Benefit)",
        "negatedLabel": "Income tax (expense) benefit",
        "verboseLabel": "Provision for income tax expense (benefit)"
       }
      }
     },
     "localname": "IncomeTaxExpenseBenefit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_IncomeTaxesPaidNet": {
     "auth_ref": [
      "r104"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.",
        "label": "Income Taxes Paid, Net",
        "terseLabel": "Net cash paid (received) for Income tax"
       }
      }
     },
     "localname": "IncomeTaxesPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InsuranceAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Insurance [Abstract]",
        "terseLabel": "Insurance [Abstract]"
       }
      }
     },
     "localname": "InsuranceAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InsuranceCommissionsAndFees": {
     "auth_ref": [
      "r665",
      "r723"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products.",
        "label": "Insurance Commissions and Fees",
        "verboseLabel": "Universal life and investment-type product policy fees"
       }
      }
     },
     "localname": "InsuranceCommissionsAndFees",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InsuranceDisclosureTextBlock": {
     "auth_ref": [
      "r807"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the types of coverages and products sold, and the assets, obligations, recorded liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.",
        "label": "Insurance Disclosure [Text Block]",
        "verboseLabel": "Insurance"
       }
      }
     },
     "localname": "InsuranceDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/Insurance"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InsuranceServicesRevenueAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Insurance Services Revenue [Abstract]",
        "verboseLabel": "Universal life and investment-type product policy fees:"
       }
      }
     },
     "localname": "InsuranceServicesRevenueAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InterestAndDebtExpense": {
     "auth_ref": [
      "r560"
     ],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 7.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 5.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Interest and debt related expenses associated with nonoperating financing activities of the entity.",
        "label": "Interest and Debt Expense",
        "verboseLabel": "Interest expense on debt"
       }
      }
     },
     "localname": "InterestAndDebtExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestCreditedToPolicyholdersAccountBalances": {
     "auth_ref": [
      "r677",
      "r718",
      "r746",
      "r750",
      "r752"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of interest expense for allocation to policyholder account balance.",
        "label": "Policyholder Account Balance, Interest Expense",
        "negatedLabel": "Interest credited to policyholder account balances",
        "terseLabel": "Net interest credited to policyholder account balances",
        "verboseLabel": "Interest credited to policyholder account balances"
       }
      }
     },
     "localname": "InterestCreditedToPolicyholdersAccountBalances",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestPaidNet": {
     "auth_ref": [
      "r93",
      "r96",
      "r104"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.",
        "label": "Interest Paid, Excluding Capitalized Interest, Operating Activities",
        "verboseLabel": "Net cash paid for Interest"
       }
      }
     },
     "localname": "InterestPaidNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InterestRateCapMember": {
     "auth_ref": [
      "r484"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract in which the cap writer, in return for a premium, agrees to limit, or cap, the cap holder's risk associated with an increase in interest rates. If rates go above a specified interest-rate-level (the strike price or the cap rate), the cap holder is entitled to receive cash payments equal to the excess of the market rate over the strike price multiplied by the notional principal amount.",
        "label": "Interest Rate Cap [Member]",
        "verboseLabel": "Interest rate caps"
       }
      }
     },
     "localname": "InterestRateCapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateContractMember": {
     "auth_ref": [
      "r344",
      "r484"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument whose primary underlying risk is tied to the right to receive or pay a sum of money at a given interest rate.",
        "label": "Interest Rate Contract [Member]",
        "terseLabel": "Interest rate contracts",
        "verboseLabel": "Interest rate derivatives"
       }
      }
     },
     "localname": "InterestRateContractMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateFloorMember": {
     "auth_ref": [
      "r484"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts in which the floor writer, in return for a premium, agrees to limit the risk associated with a decline in interest rates based on a notional amount. If rates fall below an agreed rate, the floor holder will receive cash payments from the floor writer equal to the difference between the market rate and an agreed rate multiplied by the notional principal amount.",
        "label": "Interest Rate Floor [Member]",
        "verboseLabel": "Interest rate floors"
       }
      }
     },
     "localname": "InterestRateFloorMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateRiskMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The risk associated with changes in interest rates that effect the value of an interest-bearing asset or liability, and a servicing asset or liability.",
        "label": "Interest Rate Risk [Member]",
        "terseLabel": "Interest Rate Risk [Member]"
       }
      }
     },
     "localname": "InterestRateRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateSwapMember": {
     "auth_ref": [
      "r484"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.",
        "label": "Interest Rate Swap [Member]",
        "terseLabel": "Interest Rate Swap [Member]",
        "verboseLabel": "Interest rate swaps"
       }
      }
     },
     "localname": "InterestRateSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestRateSwaptionMember": {
     "auth_ref": [
      "r484"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "An option granting the owner the right but not the obligation to enter into an interest rate swap.",
        "label": "Interest Rate Swaption [Member]",
        "verboseLabel": "Interest rate options"
       }
      }
     },
     "localname": "InterestRateSwaptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InterestReceivable": {
     "auth_ref": [
      "r30"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.",
        "label": "Interest Receivable",
        "terseLabel": "Interest Receivable"
       }
      }
     },
     "localname": "InterestReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InternalCreditAssessmentAxis": {
     "auth_ref": [
      "r195",
      "r257",
      "r261",
      "r262",
      "r300",
      "r499"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by entity-defined rating.",
        "label": "Internal Credit Assessment [Axis]",
        "terseLabel": "Internal Credit Assessment [Axis]"
       }
      }
     },
     "localname": "InternalCreditAssessmentAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InternalCreditAssessmentDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Entity defined credit risk rating.",
        "label": "Internal Credit Assessment [Domain]",
        "terseLabel": "Internal Credit Assessment [Domain]"
       }
      }
     },
     "localname": "InternalCreditAssessmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentIncomeInvestmentExpense": {
     "auth_ref": [
      "r80",
      "r721"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expenses related to the generation of investment income.",
        "label": "Investment Income, Investment Expense",
        "terseLabel": "Less: Investment expenses"
       }
      }
     },
     "localname": "InvestmentIncomeInvestmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentIncomeTextBlock": {
     "auth_ref": [
      "r77",
      "r79",
      "r80",
      "r721"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of investment income, including, but not limited to, interest and dividend income and amortization of discount (premium) derived from debt and equity securities. Excludes realized and unrealized gain (loss) on investments.",
        "label": "Investment Income [Table Text Block]",
        "verboseLabel": "Components of Net Investment Income"
       }
      }
     },
     "localname": "InvestmentIncomeTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentPolicyTextBlock": {
     "auth_ref": [
      "r230",
      "r717"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for investment in financial asset.",
        "label": "Investment, Policy [Policy Text Block]",
        "verboseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentTypeAxis": {
     "auth_ref": [
      "r809",
      "r810",
      "r811",
      "r812",
      "r813",
      "r814",
      "r815",
      "r816",
      "r817",
      "r818",
      "r819",
      "r820",
      "r821",
      "r822",
      "r823"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of investments.",
        "label": "Investment Type [Axis]",
        "terseLabel": "Investment Type [Axis]"
       }
      }
     },
     "localname": "InvestmentTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentTypeCategorizationMember": {
     "auth_ref": [
      "r809",
      "r810",
      "r811",
      "r812",
      "r813",
      "r814",
      "r815",
      "r816",
      "r817",
      "r818",
      "r819",
      "r820",
      "r821",
      "r822",
      "r823"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Asset obtained to generate income or appreciate in value.",
        "label": "Investments [Domain]",
        "terseLabel": "Investments [Domain]"
       }
      }
     },
     "localname": "InvestmentTypeCategorizationMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_Investments": {
     "auth_ref": [
      "r705"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all investments.",
        "label": "Investments",
        "totalLabel": "Total investments"
       }
      }
     },
     "localname": "Investments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Investments [Abstract]",
        "verboseLabel": "Investments:"
       }
      }
     },
     "localname": "InvestmentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsAllOtherInvestmentsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Investments, All Other Investments [Abstract]",
        "terseLabel": "Investments, All Other Investments [Abstract]"
       }
      }
     },
     "localname": "InvestmentsAllOtherInvestmentsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by investments by consolidated and nonconsolidated entities. Includes, but is not limited to, variable interest entity (VIE) for which reporting entity is or is not primary beneficiary.",
        "label": "Investments by Consolidated and Nonconsolidated Entities [Axis]",
        "terseLabel": "Investments by Consolidated and Nonconsolidated Entities [Axis]"
       }
      }
     },
     "localname": "InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsTables",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investments by consolidated and nonconsolidated entities. Includes, but is not limited to, variable interest entity (VIE) for which reporting entity is or is not primary beneficiary.",
        "label": "Investments by Consolidated and Nonconsolidated Entities [Domain]",
        "terseLabel": "Investments by Consolidated and Nonconsolidated Entities [Domain]"
       }
      }
     },
     "localname": "InvestmentsByConsolidatedAndNonconsolidatedEntitiesDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsTables",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.",
        "label": "Investments Classified by Contractual Maturity Date [Table Text Block]",
        "verboseLabel": "Available-for-sale fixed maturity securities by contractual maturity date"
       }
      }
     },
     "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Investments, Debt and Equity Securities [Abstract]",
        "terseLabel": "Investments, Debt and Equity Securities [Abstract]"
       }
      }
     },
     "localname": "InvestmentsDebtAndEquitySecuritiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_InvestmentsFairValueDisclosure": {
     "auth_ref": [
      "r517"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.",
        "label": "Investments, Fair Value Disclosure",
        "terseLabel": "Investments, Fair Value Disclosure"
       }
      }
     },
     "localname": "InvestmentsFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": {
     "auth_ref": [
      "r227",
      "r638",
      "r675",
      "r824"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for  investments in certain debt and equity securities.",
        "label": "Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]",
        "verboseLabel": "Investments"
       }
      }
     },
     "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/Investments"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureInvestmentInLeveragedLeasesNet": {
     "auth_ref": [
      "r564",
      "r574"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net investment in arrangements meeting the criteria for classification as leveraged leases including deferred taxes.",
        "label": "Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Investment in Leveraged Leases, Net",
        "terseLabel": "Leveraged Leases, Net Investment in Leveraged Leases Disclosure, Investment in Leveraged Leases, Net"
       }
      }
     },
     "localname": "LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureInvestmentInLeveragedLeasesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Liabilities": {
     "auth_ref": [
      "r22",
      "r108",
      "r173",
      "r231",
      "r442",
      "r449",
      "r450",
      "r545"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
        "label": "Liabilities",
        "terseLabel": "Liabilities",
        "totalLabel": "Total liabilities"
       }
      }
     },
     "localname": "Liabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities [Abstract]",
        "terseLabel": "Liabilities:",
        "verboseLabel": "Liabilities"
       }
      }
     },
     "localname": "LiabilitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquity": {
     "auth_ref": [
      "r17",
      "r108",
      "r231",
      "r545",
      "r644",
      "r696"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.",
        "label": "Liabilities and Equity",
        "totalLabel": "Total liabilities and equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesAndStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities and Equity [Abstract]",
        "verboseLabel": "Liabilities and Equity"
       }
      }
     },
     "localname": "LiabilitiesAndStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosure": {
     "auth_ref": [
      "r517"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value of financial and nonfinancial obligations.",
        "label": "Financial and Nonfinancial Liabilities, Fair Value Disclosure",
        "verboseLabel": "Total liabilities"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilitiesFairValueDisclosureAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liabilities, Fair Value Disclosure [Abstract]",
        "verboseLabel": "Liabilities [Abstract]"
       }
      }
     },
     "localname": "LiabilitiesFairValueDisclosureAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r738",
      "r741"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.",
        "label": "Liability for Claims and Claims Adjustment Expense",
        "periodEndLabel": "Balance, end of period (included in future policy benefits and other policy-related balances)",
        "periodStartLabel": "Balance, beginning of period"
       }
      }
     },
     "localname": "LiabilityForClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance": {
     "auth_ref": [
      "r744",
      "r751",
      "r759"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effect of reinsurance, of liability for future policy benefit.",
        "label": "Liability for Future Policy Benefit, after Reinsurance",
        "verboseLabel": "Future policy benefits"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefitAfterReinsurance",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForFuturePolicyBenefits": {
     "auth_ref": [
      "r682",
      "r744",
      "r745",
      "r751",
      "r759"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.",
        "label": "Liability for Future Policy Benefit, before Reinsurance",
        "terseLabel": "Liability for Future Policy Benefit, before Reinsurance"
       }
      }
     },
     "localname": "LiabilityForFuturePolicyBenefits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]",
        "verboseLabel": "Paid related to:"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1": {
     "auth_ref": [
      "r740"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year",
        "negatedLabel": "Current period"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1": {
     "auth_ref": [
      "r740"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years",
        "negatedLabel": "Prior periods"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1": {
     "auth_ref": [
      "r739"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims",
        "totalLabel": "Total incurred"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]",
        "verboseLabel": "Incurred related to:"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet": {
     "auth_ref": [
      "r683",
      "r738",
      "r741"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Net",
        "periodEndLabel": "Net balance, end of period",
        "periodStartLabel": "Net balance, beginning of period"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]",
        "terseLabel": "Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]"
       }
      }
     },
     "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue": {
     "auth_ref": [
      "r232"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.",
        "label": "Life Insurance, Corporate or Bank Owned, Change in Value",
        "terseLabel": "Net change in cash surrender value of investments, net of premiums paid"
       }
      }
     },
     "localname": "LifeInsuranceCorporateOrBankOwnedChangeInValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoanOriginationCommitmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Commitments to borrowers or third party investors for the origination of a loan.",
        "label": "Loan Origination Commitments [Member]",
        "verboseLabel": "Mortgage Loan Commitments"
       }
      }
     },
     "localname": "LoanOriginationCommitmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LoansAndLeasesReceivableNetReportedAmount": {
     "auth_ref": [
      "r188",
      "r654"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.",
        "label": "Loans and Leases Receivable, Net Amount",
        "terseLabel": "Subtotal mortgage loans, net"
       }
      }
     },
     "localname": "LoansAndLeasesReceivableNetReportedAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansInsurancePolicy": {
     "auth_ref": [
      "r653",
      "r703"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before allowance of loans made to policy and contract holders using their life insurance contracts' cash value or separate accounts as collateral. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums over and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.",
        "label": "Loans, Gross, Insurance Policy",
        "terseLabel": "Policy loans",
        "verboseLabel": "Policy loans"
       }
      }
     },
     "localname": "LoansInsurancePolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LoansReceivableHeldForSaleAmount": {
     "auth_ref": [
      "r188",
      "r825"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before valuation allowance, of financing receivable classified as held-for-sale.",
        "label": "Financing Receivable, Held-for-Sale",
        "terseLabel": "Mortgage loans held-for-sale"
       }
      }
     },
     "localname": "LoansReceivableHeldForSaleAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebt": {
     "auth_ref": [
      "r9",
      "r304",
      "r642",
      "r691"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 8.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.",
        "label": "Long-term Debt",
        "terseLabel": "Long-term debt (includes $5 and $5, respectively, at estimated fair value, relating to variable interest entities)"
       }
      }
     },
     "localname": "LongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of long-term debt and lease obligation, including portion classified as current.",
        "label": "Long-term Debt and Lease Obligation, Including Current Maturities",
        "terseLabel": "Long-term Debt and Lease Obligation, Including Current Maturities"
       }
      }
     },
     "localname": "LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LongTermDebtFairValue": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.",
        "label": "Long-term Debt, Fair Value",
        "terseLabel": "Long-term debt"
       }
      }
     },
     "localname": "LongTermDebtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_LossContingenciesByNatureOfContingencyAxis": {
     "auth_ref": [
      "r287",
      "r288",
      "r289",
      "r291",
      "r292",
      "r293",
      "r294",
      "r297",
      "r298"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur.",
        "label": "Loss Contingency Nature [Axis]",
        "terseLabel": "Loss Contingency Nature [Axis]"
       }
      }
     },
     "localname": "LossContingenciesByNatureOfContingencyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingenciesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Loss Contingencies [Line Items]",
        "terseLabel": "Loss Contingencies [Line Items]"
       }
      }
     },
     "localname": "LossContingenciesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingenciesTable": {
     "auth_ref": [
      "r287",
      "r288",
      "r289",
      "r291",
      "r292",
      "r293",
      "r294",
      "r297",
      "r298"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Discloses the specific components (such as the nature, name, and date) of the loss contingency and gives an estimate of the possible loss or range of loss, or states that a reasonable estimate cannot be made. Excludes environmental contingencies, warranties and unconditional purchase obligations.",
        "label": "Loss Contingencies [Table]",
        "terseLabel": "Loss Contingencies [Table]"
       }
      }
     },
     "localname": "LossContingenciesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingencyInformationAboutLitigationMattersAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Loss Contingency, Information about Litigation Matters [Abstract]",
        "verboseLabel": "Loss Contingencies"
       }
      }
     },
     "localname": "LossContingencyInformationAboutLitigationMattersAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_LossContingencyNatureDomain": {
     "auth_ref": [
      "r287",
      "r288",
      "r289",
      "r291",
      "r292",
      "r293",
      "r294",
      "r297",
      "r298"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "An existing condition, situation, or set of circumstances involving uncertainty as to possible loss to an enterprise that will ultimately be resolved when one or more future events occur or fail to occur. Resolution of the uncertainty may confirm the incurrence of a loss or impairment of an asset or the incurrence of a liability.",
        "label": "Loss Contingency, Nature [Domain]",
        "terseLabel": "Loss Contingency, Nature [Domain]"
       }
      }
     },
     "localname": "LossContingencyNatureDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_LossContingencyNewClaimsFiledNumber": {
     "auth_ref": [
      "r290"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The total number of new claims filed pertaining to a loss contingency during the period.",
        "label": "Loss Contingency, New Claims Filed, Number",
        "verboseLabel": "Asbestos-Related Claims"
       }
      }
     },
     "localname": "LossContingencyNewClaimsFiledNumber",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued": {
     "auth_ref": [
      "r286"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.",
        "label": "Loss Contingency, Range of Possible Loss, Portion Not Accrued",
        "terseLabel": "Loss Contingency, Range of Possible Loss, Portion Not Accrued"
       }
      }
     },
     "localname": "LossContingencyRangeOfPossibleLossPortionNotAccrued",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesContingenciesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRiskAxis": {
     "auth_ref": [
      "r604"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of risks inherent in servicing assets and servicing liabilities.",
        "label": "Servicing Assets and Servicing Liabilities Risk [Axis]",
        "terseLabel": "Servicing Assets and Servicing Liabilities Risk [Axis]"
       }
      }
     },
     "localname": "ManagingRisksInherentInServicingAssetsAndServicingLiabilitiesByTypeOfRiskAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MarketApproachValuationTechniqueMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valuation approach using price and other relevant information generated by market transaction involving identical or comparable asset, liability, or group of assets and liabilities.",
        "label": "Valuation, Market Approach [Member]",
        "terseLabel": "Valuation Technique, Market Approach"
       }
      }
     },
     "localname": "MarketApproachValuationTechniqueMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MarketableSecuritiesGainLossAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Marketable Securities, Gain (Loss) [Abstract]",
        "terseLabel": "Marketable Securities, Gain (Loss) [Abstract]"
       }
      }
     },
     "localname": "MarketableSecuritiesGainLossAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MaterialReconcilingItemsMember": {
     "auth_ref": [
      "r175"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Items used in reconciling reportable segments' amounts to consolidated amount. Excludes corporate-level activity.",
        "label": "Segment Reconciling Items [Member]",
        "verboseLabel": "Significant Reconciling Items"
       }
      }
     },
     "localname": "MaterialReconcilingItemsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MaturityOvernightMember": {
     "auth_ref": [
      "r113"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maturity period of the day after the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements.",
        "label": "Maturity Overnight [Member]",
        "terseLabel": "Open\u00a0(1)"
       }
      }
     },
     "localname": "MaturityOvernightMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MaturityUpTo30DaysMember": {
     "auth_ref": [
      "r113"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maturity period of up to 30 days from the reporting date for repurchase agreements and similar transactions, for example, but not limited to, securities lending arrangements.",
        "label": "Maturity Less than 30 Days [Member]",
        "terseLabel": "1\u00a0Month or Less"
       }
      }
     },
     "localname": "MaturityUpTo30DaysMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MaximumLengthOfTimeHedgedInCashFlowHedge1": {
     "auth_ref": [
      "r514"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Maximum Length of Time Hedged in Cash Flow Hedge",
        "verboseLabel": "Hedging exposure to variability in future cash flows for specific length of time"
       }
      }
     },
     "localname": "MaximumLengthOfTimeHedgedInCashFlowHedge1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_MeasurementInputCounterpartyCreditRiskMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using risk that counterparty to contract will default.",
        "label": "Measurement Input, Counterparty Credit Risk [Member]",
        "terseLabel": "Measurement Input, Counterparty Credit Risk"
       }
      }
     },
     "localname": "MeasurementInputCounterpartyCreditRiskMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputCreditSpreadMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using amount above (below) yield between two debt instruments similar in maturity, but different in credit quality.",
        "label": "Measurement Input, Credit Spread [Member]",
        "terseLabel": "Measurement Input, Credit Spread"
       }
      }
     },
     "localname": "MeasurementInputCreditSpreadMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputLapseRateMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate insurance policy terminates due to non-payment of premium.",
        "label": "Measurement Input, Lapse Rate [Member]",
        "terseLabel": "Measurement Input, Lapse Rate"
       }
      }
     },
     "localname": "MeasurementInputLapseRateMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputMortalityRateMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using likelihood of death in specific group to population.",
        "label": "Measurement Input, Mortality Rate [Member]",
        "terseLabel": "Measurement Input, Mortality Rate"
       }
      }
     },
     "localname": "MeasurementInputMortalityRateMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputOfferedPriceMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using offered price.",
        "label": "Measurement Input, Offered Price [Member]",
        "terseLabel": "Measurement Input, Offered Price"
       }
      }
     },
     "localname": "MeasurementInputOfferedPriceMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputPriceVolatilityMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate at which price of security will increase (decrease) for given set of returns.",
        "label": "Measurement Input, Price Volatility [Member]",
        "terseLabel": "Measurement Input, Price Volatility"
       }
      }
     },
     "localname": "MeasurementInputPriceVolatilityMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputQuotedPriceMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using quoted price.",
        "label": "Measurement Input, Quoted Price [Member]",
        "terseLabel": "Measurement Input, Quoted Price"
       }
      }
     },
     "localname": "MeasurementInputQuotedPriceMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputTypeAxis": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Axis]",
        "terseLabel": "Measurement Input Type [Axis]"
       }
      }
     },
     "localname": "MeasurementInputTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_MeasurementInputTypeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input used to determine value of asset and liability.",
        "label": "Measurement Input Type [Domain]",
        "terseLabel": "Measurement Input Type [Domain]"
       }
      }
     },
     "localname": "MeasurementInputTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputUtilizationRateMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate at which policyholder exercises optional benefit upon eligibility under insurance contract.",
        "label": "Measurement Input, Utilization Rate [Member]",
        "terseLabel": "Measurement Input, Utilization Rate"
       }
      }
     },
     "localname": "MeasurementInputUtilizationRateMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MeasurementInputWithdrawalRateMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement input using rate at which policyholder begins withdrawal of benefit relative to maximum allowable under insurance contract.",
        "label": "Measurement Input, Withdrawal Rate [Member]",
        "terseLabel": "Measurement Input, Withdrawal Rate"
       }
      }
     },
     "localname": "MeasurementInputWithdrawalRateMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MinorityInterest": {
     "auth_ref": [
      "r29",
      "r108",
      "r231",
      "r545",
      "r643",
      "r695"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).",
        "label": "Stockholders' Equity Attributable to Noncontrolling Interest",
        "verboseLabel": "Noncontrolling interests"
       }
      }
     },
     "localname": "MinorityInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MinorityInterestPeriodIncreaseDecrease": {
     "auth_ref": [
      "r437"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net Increase or Decrease in balance of noncontrolling interest in the subsidiary during the reporting period.",
        "label": "Noncontrolling Interest, Period Increase (Decrease)",
        "verboseLabel": "Change in equity of noncontrolling interests"
       }
      }
     },
     "localname": "MinorityInterestPeriodIncreaseDecrease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MortgageLoansInProcessOfForeclosureAmount": {
     "auth_ref": [
      "r196"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.",
        "label": "Mortgage Loans in Process of Foreclosure, Amount",
        "terseLabel": "Mortgage Loans in Process of Foreclosure, Amount"
       }
      }
     },
     "localname": "MortgageLoansInProcessOfForeclosureAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MortgageLoansOnRealEstateCommercialAndConsumerNet": {
     "auth_ref": [
      "r701"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.",
        "label": "Mortgage Loans on Real Estate, Commercial and Consumer, Net",
        "netLabel": "Mortgage loans, net\u00a0(1)",
        "terseLabel": "Mortgage loans (net of allowance for credit loss of $452 and $289, respectively; includes $198 and $210, respectively, relating to variable interest entities; includes $176 and $188, respectively, under the fair value option and $0 and $59, respectively, of mortgage loans held-for-sale)",
        "verboseLabel": "Mortgage Loans on Real Estate, Commercial and Consumer, Net"
       }
      }
     },
     "localname": "MortgageLoansOnRealEstateCommercialAndConsumerNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_MortgagesMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A loan to finance the purchase of real estate where the lender has a lien on the property as collateral for the loan.",
        "label": "Mortgages [Member]",
        "terseLabel": "Mortgages [Member]",
        "verboseLabel": "Mortgage loans"
       }
      }
     },
     "localname": "MortgagesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesFairValueHedgesDetails",
      "http://www.metlife.com/role/FairValueNonrecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_MovementInClosedBlockDividendObligationRollForward": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.",
        "label": "Movement in Closed Block Dividend Obligation [Roll Forward]",
        "verboseLabel": "Closed block policyholder dividend obligation"
       }
      }
     },
     "localname": "MovementInClosedBlockDividendObligationRollForward",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockPolicyholderDividendObligationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeGeneralAccountValue": {
     "auth_ref": [
      "r778"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of the general accounts corresponding to the specified product, guarantee type and subset of the guarantee.",
        "label": "Net Amount at Risk by Product and Guarantee, General Account Value",
        "verboseLabel": "Total account value"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeGeneralAccountValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Net Amount at Risk by Product and Guarantee [Line Items]",
        "terseLabel": "Net Amount at Risk by Product and Guarantee [Line Items]"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeNetAmountAtRisk": {
     "auth_ref": [
      "r680",
      "r782"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net amount at risk, representing the guaranteed benefit in excess of the current account balance corresponding to the specified product, guarantee type and subset of the guarantee.",
        "label": "Net Amount at Risk by Product and Guarantee, Net Amount at Risk",
        "terseLabel": "Net amount at risk (6)",
        "verboseLabel": "Net amount at risk"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeNetAmountAtRisk",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeSeparateAccountValue": {
     "auth_ref": [
      "r680",
      "r776"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Value of the separate accounts corresponding to the specified product, guarantee type and subset of the guarantee.",
        "label": "Net Amount at Risk by Product and Guarantee, Separate Account Value",
        "verboseLabel": "Separate account value (1)"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeSeparateAccountValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeTable": {
     "auth_ref": [
      "r680",
      "r778"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For contracts with guaranteed benefits in excess of the current account balance, sets forth the amounts of such excesses (the net amounts at risk) and other pertinent information by type of guarantee by type of insurance product), as of the most recent balance sheet date.",
        "label": "Net Amount at Risk, by Product and Guarantee [Table]",
        "terseLabel": "Net Amount at Risk, by Product and Guarantee [Table]"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetAmountAtRiskByProductAndGuaranteeWeightedAverageAttainedAge1": {
     "auth_ref": [
      "r680",
      "r777"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Weighted average attained age of policyholders or contract holders in the specified guarantee type and subset of guarantee class, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.",
        "label": "Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age",
        "terseLabel": "Average attained age of policyholders",
        "verboseLabel": "Average attained age of contractholders"
       }
      }
     },
     "localname": "NetAmountAtRiskByProductAndGuaranteeWeightedAverageAttainedAge1",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails",
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoUniversalandVariableLifeContractsDetails"
     ],
     "xbrltype": "durationItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivities": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "label": "Net Cash Provided by (Used in) Financing Activities",
        "totalLabel": "Net cash provided by (used in) financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]",
        "verboseLabel": "Cash flows from financing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivities": {
     "auth_ref": [
      "r95"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.",
        "label": "Net Cash Provided by (Used in) Investing Activities",
        "totalLabel": "Net cash provided by (used in) investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]",
        "verboseLabel": "Cash flows from investing activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NetCashProvidedByUsedInOperatingActivities": {
     "auth_ref": [
      "r95",
      "r98",
      "r101"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect",
       "weight": 1.0
      }
     },
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.",
        "label": "Net Cash Provided by (Used in) Operating Activities",
        "verboseLabel": "Net cash provided by (used in) operating activities"
       }
      }
     },
     "localname": "NetCashProvidedByUsedInOperatingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r57",
      "r60",
      "r132",
      "r133",
      "r445",
      "r459"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of Net Income (Loss) attributable to noncontrolling interest.",
        "label": "Net Income (Loss) Attributable to Noncontrolling Interest",
        "terseLabel": "Less: Net income (loss) attributable to noncontrolling interests"
       }
      }
     },
     "localname": "NetIncomeLossAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic": {
     "auth_ref": [
      "r127",
      "r128",
      "r129",
      "r130",
      "r135",
      "r136",
      "r137",
      "r138",
      "r165",
      "r171",
      "r175",
      "r178",
      "r181"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.",
        "label": "Net Income (Loss) Available to Common Stockholders, Basic",
        "terseLabel": "Net income (loss) attributable to Metropolitan Life Insurance Company"
       }
      }
     },
     "localname": "NetIncomeLossAvailableToCommonStockholdersBasic",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetInvestmentInLease": {
     "auth_ref": [
      "r570"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of net investment in sales-type and direct financing lease.",
        "label": "Net Investment in Lease",
        "terseLabel": "Other Invested Assets - Leveraged and Direct Financing Leases"
       }
      }
     },
     "localname": "NetInvestmentInLease",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetInvestmentInLeaseAllowanceForCreditLoss": {
     "auth_ref": [
      "r240",
      "r244",
      "r245"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of allowance for credit loss on net investment in sales-type and direct financing leases.",
        "label": "Net Investment in Lease, Allowance for Credit Loss",
        "terseLabel": "Leveraged and Direct Financing Leases, Allowance for credit loss"
       }
      }
     },
     "localname": "NetInvestmentInLeaseAllowanceForCreditLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsLeveragedandDirectFinancingLeasesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NetInvestmentIncome": {
     "auth_ref": [
      "r712"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.",
        "label": "Net Investment Income",
        "terseLabel": "Net Investment Income",
        "verboseLabel": "Net investment income"
       }
      }
     },
     "localname": "NetInvestmentIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "New Accounting Pronouncements or Change in Accounting Principle [Line Items]",
        "terseLabel": "New Accounting Pronouncements or Change in Accounting Principle [Line Items]"
       }
      }
     },
     "localname": "NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable": {
     "auth_ref": [
      "r121",
      "r122",
      "r123",
      "r124",
      "r125",
      "r126",
      "r129",
      "r139",
      "r234",
      "r235",
      "r236",
      "r237",
      "r238",
      "r239",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r425",
      "r426",
      "r427",
      "r428",
      "r622",
      "r623",
      "r624",
      "r754",
      "r755",
      "r756",
      "r757",
      "r758",
      "r759",
      "r760",
      "r761",
      "r762",
      "r763",
      "r764",
      "r765"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Summarization of the changes in an accounting principle or a new accounting pronouncement, including the line items affected by the change and the financial effects of the change on those particular line items.",
        "label": "Accounting Standards Update and Change in Accounting Principle [Table]",
        "terseLabel": "Accounting Standards Update and Change in Accounting Principle [Table]"
       }
      }
     },
     "localname": "NewAccountingPronouncementsOrChangeInAccountingPrincipleTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.",
        "label": "New Accounting Pronouncements, Policy [Policy Text Block]",
        "terseLabel": "New Accounting Pronouncements"
       }
      }
     },
     "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_NoncontrollingInterestMember": {
     "auth_ref": [
      "r118",
      "r119",
      "r120",
      "r306",
      "r436"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents that portion of equity (net assets) in a subsidiary not attributable, directly or indirectly, to the parent. A noncontrolling interest is sometimes called a minority interest.",
        "label": "Noncontrolling Interest [Member]",
        "terseLabel": "Noncontrolling Interests"
       }
      }
     },
     "localname": "NoncontrollingInterestMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NondesignatedMember": {
     "auth_ref": [
      "r470"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Derivative instrument not designated as hedging instrument under Generally Accepted Accounting Principles (GAAP).",
        "label": "Not Designated as Hedging Instrument [Member]",
        "terseLabel": "Not Designated as Hedging Instrument [Member]",
        "verboseLabel": "Derivatives Not Designated or Not Qualifying as Hedging Instruments:"
       }
      }
     },
     "localname": "NondesignatedMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NonoperatingIncomeExpenseMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing nonoperating income (expense).",
        "label": "Nonoperating Income (Expense) [Member]",
        "terseLabel": "Nonoperating Income (Expense) [Member]"
       }
      }
     },
     "localname": "NonoperatingIncomeExpenseMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NonperformingFinancingReceivableMember": {
     "auth_ref": [
      "r195",
      "r257"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Category status of financial instruments in which payments are past due in accordance with the terms of the contract. Financial instruments include, but are not limited to, financing receivables, loans, debt, and investments.",
        "label": "Nonperforming Financial Instruments [Member]",
        "terseLabel": "Nonperforming"
       }
      }
     },
     "localname": "NonperformingFinancingReceivableMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_NotesReceivableGross": {
     "auth_ref": [
      "r256",
      "r262",
      "r263"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before allowance for credit loss, of financing receivable.",
        "label": "Financing Receivable, before Allowance for Credit Loss",
        "terseLabel": "Mortgage Loans, Gross"
       }
      }
     },
     "localname": "NotesReceivableGross",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NotesReceivableNet": {
     "auth_ref": [
      "r11",
      "r188",
      "r256"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.",
        "label": "Financing Receivable, after Allowance for Credit Loss",
        "terseLabel": "Total mortgage loans held-for-investment, net"
       }
      }
     },
     "localname": "NotesReceivableNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_NumberOfReportableSegments": {
     "auth_ref": [
      "r153"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.",
        "label": "Number of Reportable Segments",
        "terseLabel": "Number of segments",
        "verboseLabel": "Number of segments"
       }
      }
     },
     "localname": "NumberOfReportableSegments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails",
      "http://www.metlife.com/role/SegmentInformationNarrativeDetails"
     ],
     "xbrltype": "integerItemType"
    },
    "us-gaap_OffsettingAssetsLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Offsetting Assets [Line Items]",
        "terseLabel": "Offsetting Assets [Line Items]"
       }
      }
     },
     "localname": "OffsettingAssetsLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OffsettingAssetsTable": {
     "auth_ref": [
      "r40",
      "r41"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about derivative and financial assets that are subject to offsetting, including enforceable master netting arrangements.",
        "label": "Offsetting Assets [Table]",
        "terseLabel": "Offsetting Assets [Table]"
       }
      }
     },
     "localname": "OffsettingAssetsTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OffsettingAssetsTableTextBlock": {
     "auth_ref": [
      "r40",
      "r41"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements.",
        "label": "Offsetting Assets [Table Text Block]",
        "verboseLabel": "Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral"
       }
      }
     },
     "localname": "OffsettingAssetsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OffsettingLiabilitiesTableTextBlock": {
     "auth_ref": [
      "r40",
      "r41"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of derivative and other financial liabilities that are subject to offsetting, including master netting arrangements.",
        "label": "Offsetting Liabilities [Table Text Block]",
        "verboseLabel": "Estimated Fair Value of Derivative Assets and Liabilities after Master Netting Agreements and Cash Collateral"
       }
      }
     },
     "localname": "OffsettingLiabilitiesTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OperatingExpenses": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      },
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.",
        "label": "Operating Expenses",
        "terseLabel": "Net other expenses",
        "totalLabel": "Total other expenses",
        "verboseLabel": "Other expenses"
       }
      }
     },
     "localname": "OperatingExpenses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingIncomeLoss": {
     "auth_ref": [
      "r165",
      "r171",
      "r175",
      "r178",
      "r181"
     ],
     "calculation": {
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net result for the period of deducting operating expenses from operating revenues.",
        "label": "Operating Income (Loss)",
        "totalLabel": "Adjusted earnings"
       }
      }
     },
     "localname": "OperatingIncomeLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingLeaseLeaseIncome": {
     "auth_ref": [
      "r140",
      "r571",
      "r572"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.",
        "label": "Operating Lease, Lease Income",
        "terseLabel": "Operating Lease, Lease Income"
       }
      }
     },
     "localname": "OperatingLeaseLeaseIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OperatingSegmentsMember": {
     "auth_ref": [
      "r170",
      "r171",
      "r172",
      "r173",
      "r175",
      "r181"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Operating Segments [Member]",
        "verboseLabel": "Operating Segments"
       }
      }
     },
     "localname": "OperatingSegmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Organization, Consolidation and Presentation of Financial Statements [Abstract]",
        "terseLabel": "Organization, Consolidation and Presentation of Financial Statements [Abstract]"
       }
      }
     },
     "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock": {
     "auth_ref": [
      "r117",
      "r134",
      "r151",
      "r461"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for the general note to the financial statements for the reporting entity which may include, descriptions of the basis of presentation, business description, significant accounting policies, consolidations, reclassifications, new pronouncements not yet adopted and changes in accounting principles.",
        "label": "Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]",
        "verboseLabel": "Business, Basis of Presentation and Summary of Significant Accounting Policies"
       }
      }
     },
     "localname": "OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherAssets": {
     "auth_ref": [
      "r4",
      "r639",
      "r687"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of assets classified as other.",
        "label": "Other Assets",
        "terseLabel": "Other assets relating to variable interest entities",
        "verboseLabel": "Other assets (includes $2 and $2, respectively, relating to variable interest entities)"
       }
      }
     },
     "localname": "OtherAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent [Abstract]",
        "terseLabel": "Components of net unrealized gains (losses) included in accumulated other comprehensive income"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax": {
     "auth_ref": [
      "r46",
      "r47",
      "r51"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, before tax and after adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.",
        "label": "OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax",
        "negatedTerseLabel": "Change in Gross Unrealized Temporary Loss"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax": {
     "auth_ref": [
      "r54",
      "r553",
      "r555",
      "r559"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax and reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss), before Reclassifications, before Tax",
        "terseLabel": "OCI before reclassifications"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": {
     "auth_ref": [
      "r54",
      "r63",
      "r553",
      "r555",
      "r559"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss), before Reclassifications, Net of Tax",
        "terseLabel": "AOCI before reclassifications, net of income tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax": {
     "auth_ref": [
      "r52"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss) before Reclassifications, Tax",
        "terseLabel": "Deferred income tax benefit (expense)"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeTax": {
     "auth_ref": [
      "r67",
      "r229",
      "r553",
      "r558",
      "r559",
      "r660",
      "r711"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax, after reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss), before Tax",
        "terseLabel": "Other Comprehensive Income (Loss), before Tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract]",
        "verboseLabel": "Changes In Net Unrealized Investment Gains Losses Included In Accumulated Other Comprehensive Loss [Abstract]"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParentAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsChangesinNetUnrealizedInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherComprehensiveIncomeLossNetOfTax": {
     "auth_ref": [
      "r58",
      "r61",
      "r63",
      "r67",
      "r305",
      "r553",
      "r558",
      "r559",
      "r660",
      "r711"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).",
        "label": "Other Comprehensive Income (Loss), Net of Tax",
        "verboseLabel": "Other comprehensive income (loss), net of income tax"
       }
      }
     },
     "localname": "OtherComprehensiveIncomeLossNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Expenses [Abstract]",
        "verboseLabel": "Other expenses:"
       }
      }
     },
     "localname": "OtherExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherIncome": {
     "auth_ref": [
      "r723"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of revenue and income classified as other.",
        "label": "Other Income",
        "terseLabel": "Net other revenues",
        "verboseLabel": "Other revenues"
       }
      }
     },
     "localname": "OtherIncome",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/OtherRevenuesDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherIncomeAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Component of Operating Income [Abstract]",
        "verboseLabel": "Other revenues:"
       }
      }
     },
     "localname": "OtherIncomeAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherIncomeAndExpensesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Other Income and Expenses [Abstract]",
        "terseLabel": "Other Income and Expenses [Abstract]"
       }
      }
     },
     "localname": "OtherIncomeAndExpensesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_OtherIncomeAndOtherExpenseDisclosureTextBlock": {
     "auth_ref": [
      "r317",
      "r417"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for other income or other expense items (both operating and nonoperating). Sources of nonoperating income or nonoperating expense that may be disclosed, include amounts earned from dividends, interest on securities, profits (losses) on securities, net and miscellaneous other income or income deductions.",
        "label": "Other Income and Other Expense Disclosure [Text Block]",
        "verboseLabel": "Other Revenues and Other Expenses Disclosure"
       }
      }
     },
     "localname": "OtherIncomeAndOtherExpenseDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesandOtherExpenses"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_OtherIncomeMember": {
     "auth_ref": [
      "r493"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other revenue.",
        "label": "Other Income [Member]",
        "terseLabel": "Other Income"
       }
      }
     },
     "localname": "OtherIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherInvestments": {
     "auth_ref": [
      "r20",
      "r704"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investments classified as other.",
        "label": "Other Investments",
        "netLabel": "Other Investments",
        "terseLabel": "Other invested assets relating to variable interest entities",
        "verboseLabel": "Other invested assets (includes $1,013 and $1,085, respectively, of leveraged and direct financing leases and $85 and $94, respectively, relating to variable interest entities)"
       }
      }
     },
     "localname": "OtherInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherInvestmentsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other investments.",
        "label": "Other Investments [Member]",
        "terseLabel": "Other",
        "verboseLabel": "Other Investments"
       }
      }
     },
     "localname": "OtherInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherLiabilities": {
     "auth_ref": [
      "r651"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 10.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liabilities classified as other.",
        "label": "Other Liabilities",
        "terseLabel": "Other Liabilities",
        "verboseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesFairValueDisclosure": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of other liabilities.",
        "label": "Other Liabilities, Fair Value Disclosure",
        "terseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OtherLiabilitiesMember": {
     "auth_ref": [
      "r472",
      "r509"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Primary financial statement caption encompassing other liabilities.",
        "label": "Other Liabilities [Member]",
        "verboseLabel": "Other liabilities"
       }
      }
     },
     "localname": "OtherLiabilitiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEmbeddedDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember": {
     "auth_ref": [
      "r319",
      "r320",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337",
      "r338",
      "r339",
      "r340",
      "r341",
      "r342",
      "r343",
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r364",
      "r365",
      "r366",
      "r367",
      "r369",
      "r372",
      "r376",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r395",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Plan designed to provide other postretirement benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes pension benefits.",
        "label": "Other Postretirement Benefits Plan [Member]",
        "terseLabel": "Other Postretirement Benefits"
       }
      }
     },
     "localname": "OtherPostretirementBenefitPlansDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet": {
     "auth_ref": [],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.",
        "label": "Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net",
        "negatedLabel": "Total OTTI losses recognized in earnings"
       }
      }
     },
     "localname": "OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_OverTheCounterMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Transaction that does not take place on an organized exchange.",
        "label": "Over the Counter [Member]",
        "terseLabel": "Over the Counter [Member]"
       }
      }
     },
     "localname": "OverTheCounterMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ParentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portion of equity, or net assets, in the consolidated entity attributable, directly or indirectly, to the parent. Excludes noncontrolling interests.",
        "label": "Parent [Member]",
        "terseLabel": "Total Metropolitan Life Insurance Company Stockholder\u2019s Equity"
       }
      }
     },
     "localname": "ParentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PartnershipMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Legal entity in the form of a partnership created to conduct business.",
        "label": "Partnership [Member]",
        "terseLabel": "Renewable energy partnership"
       }
      }
     },
     "localname": "PartnershipMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PaymentsForLossesAndLossAdjustmentExpense": {
     "auth_ref": [
      "r97",
      "r740"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process.",
        "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid",
        "negatedTotalLabel": "Total paid"
       }
      }
     },
     "localname": "PaymentsForLossesAndLossAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities": {
     "auth_ref": [
      "r116"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash outflow or inflow from derivative instruments during the period, which are classified as financing activities, excluding those designated as hedging instruments.",
        "label": "Payments for (Proceeds from) Derivative Instrument, Financing Activities",
        "negatedTerseLabel": "Financing element on certain derivative instruments and other derivative related transactions, net"
       }
      }
     },
     "localname": "PaymentsForProceedsFromDerivativeInstrumentFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": {
     "auth_ref": [
      "r84",
      "r87",
      "r116"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 17.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.",
        "label": "Payments for (Proceeds from) Other Investing Activities",
        "negatedLabel": "Other, net"
       }
      }
     },
     "localname": "PaymentsForProceedsFromOtherInvestingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromPolicyLoans": {
     "auth_ref": [
      "r116"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 13.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Net amount paid or received by the entity associated with issuance or collection of loans made to policy holders, principally secured by the benefits under the policy.",
        "label": "Payments for (Proceeds from) Policy Loans",
        "negatedLabel": "Net change in policy loans"
       }
      }
     },
     "localname": "PaymentsForProceedsFromPolicyLoans",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromProductiveAssets": {
     "auth_ref": [
      "r116"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 16.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net cash outflow or inflow from purchases, sales and disposals of property, plant and equipment and other productive assets, including intangibles.",
        "label": "Payments for (Proceeds from) Productive Assets",
        "negatedTerseLabel": "Net change in property, equipment and leasehold improvements"
       }
      }
     },
     "localname": "PaymentsForProceedsFromProductiveAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsForProceedsFromShortTermInvestments": {
     "auth_ref": [
      "r82",
      "r85",
      "r103"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 14.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The net amount paid (received) by the reporting entity through acquisition or sale and maturities of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.",
        "label": "Payments for (Proceeds from) Short-term Investments",
        "negatedLabel": "Net change in short-term investments"
       }
      }
     },
     "localname": "PaymentsForProceedsFromShortTermInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsOfDistributionsToAffiliates": {
     "auth_ref": [
      "r90"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.",
        "label": "Payments of Distributions to Affiliates",
        "negatedLabel": "Dividends paid to MetLife, Inc."
       }
      }
     },
     "localname": "PaymentsOfDistributionsToAffiliates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": {
     "auth_ref": [
      "r81",
      "r85",
      "r205"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 6.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Payments to Acquire Debt Securities, Available-for-sale",
        "negatedLabel": "Purchases of fixed maturity securities available-for-sale"
       }
      }
     },
     "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity": {
     "auth_ref": [
      "r86",
      "r205"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities.",
        "label": "Payments to Acquire Available-for-sale Securities, Equity",
        "negatedLabel": "Purchases of equity securities"
       }
      }
     },
     "localname": "PaymentsToAcquireAvailableForSaleSecuritiesEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireLimitedPartnershipInterests": {
     "auth_ref": [
      "r86"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 10.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes.",
        "label": "Payments to Acquire Limited Partnership Interests",
        "negatedLabel": "Purchases of other limited partnership interests"
       }
      }
     },
     "localname": "PaymentsToAcquireLimitedPartnershipInterests",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireMortgageNotesReceivable": {
     "auth_ref": [
      "r85"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow from the purchase of receivables arising from the mortgage note on real estate.",
        "label": "Payments to Acquire Mortgage Notes Receivable",
        "negatedLabel": "Purchases of mortgage loans"
       }
      }
     },
     "localname": "PaymentsToAcquireMortgageNotesReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PaymentsToAcquireRealEstateAndRealEstateJointVentures": {
     "auth_ref": [
      "r87"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 9.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow associated with the purchase of real estate held-for-investment and real estate joint ventures.",
        "label": "Payments to Acquire Real Estate and Real Estate Joint Ventures",
        "negatedLabel": "Purchases of real estate and real estate joint ventures"
       }
      }
     },
     "localname": "PaymentsToAcquireRealEstateAndRealEstateJointVentures",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": {
     "auth_ref": [
      "r343",
      "r345",
      "r351",
      "r368",
      "r370",
      "r371",
      "r372",
      "r373",
      "r374",
      "r389",
      "r391",
      "r394",
      "r395",
      "r408"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for retirement benefits.",
        "label": "Retirement Benefits [Text Block]",
        "terseLabel": "Employee Benefit Plans"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlans"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PensionAndOtherPostretirementPlansPolicy": {
     "auth_ref": [
      "r106",
      "r375",
      "r392",
      "r393",
      "r395",
      "r401"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for pension and other postretirement benefit plans. This accounting policy may address (1) the types of plans sponsored by the entity, and the benefits provided by each plan (2) groups that participate in (or are covered by) each plan (3) how plan assets, liabilities and expenses are measured, including the use of any actuaries and (4) significant assumptions used by the entity to value plan assets and liabilities and how such assumptions are derived.",
        "label": "Pension and Other Postretirement Plans, Policy [Policy Text Block]",
        "verboseLabel": "Employee Benefit Plans"
       }
      }
     },
     "localname": "PensionAndOtherPostretirementPlansPolicy",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_PensionPlansDefinedBenefitMember": {
     "auth_ref": [
      "r318",
      "r320",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337",
      "r338",
      "r339",
      "r340",
      "r341",
      "r342",
      "r343",
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r364",
      "r365",
      "r366",
      "r367",
      "r369",
      "r372",
      "r376",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r395",
      "r396",
      "r403",
      "r404",
      "r405",
      "r406"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.",
        "label": "Pension Plan [Member]",
        "verboseLabel": "Pension Benefits"
       }
      }
     },
     "localname": "PensionPlansDefinedBenefitMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PerformingFinancingReceivableMember": {
     "auth_ref": [
      "r195",
      "r257"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Category status of financial instruments in which payments are received or paid on a timely basis in accordance with the terms of the contract. Financial instruments include, but are not limited to, financing receivables, loans, debt instruments, and investments.",
        "label": "Performing Financial Instruments [Member]",
        "terseLabel": "Performing"
       }
      }
     },
     "localname": "PerformingFinancingReceivableMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PolicyLoansMember": {
     "auth_ref": [
      "r783"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Loan issued by an insurance company, collateralized by the cash value of the borrower's life insurance policy.",
        "label": "Policy Loans [Member]",
        "terseLabel": "Policy loans"
       }
      }
     },
     "localname": "PolicyLoansMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Policyholder Benefits and Claims Incurred [Abstract]",
        "verboseLabel": "Policyholder benefits and claims:"
       }
      }
     },
     "localname": "PolicyholderBenefitsAndClaimsIncurredAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet": {
     "auth_ref": [
      "r678",
      "r724"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.",
        "label": "Policyholder Benefits and Claims Incurred, Net",
        "negatedTerseLabel": "Net policyholder benefits and claims",
        "verboseLabel": "Policyholder benefits and claims"
       }
      }
     },
     "localname": "PolicyholderBenefitsAndClaimsIncurredNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PolicyholderContractDeposits": {
     "auth_ref": [
      "r737"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liability due to policyholder for deposit held under long-duration contract issued by insurance entity.",
        "label": "Policyholder Contract Deposit",
        "verboseLabel": "Policyholder account balances"
       }
      }
     },
     "localname": "PolicyholderContractDeposits",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PolicyholderDividends": {
     "auth_ref": [
      "r718",
      "r766"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_BenefitsLossesAndExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense for dividends to policyholders.",
        "label": "Policyholder Dividends, Expense",
        "verboseLabel": "Policyholder dividends"
       }
      }
     },
     "localname": "PolicyholderDividends",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PolicyholderDividendsPayable": {
     "auth_ref": [
      "r706",
      "r766"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of the liability for dividends that are payable to the policyholders based upon the terms of the underlying insurance contracts.",
        "label": "Policyholder Dividends Payable",
        "verboseLabel": "Policyholder dividends payable"
       }
      }
     },
     "localname": "PolicyholderDividendsPayable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PortionAtFairValueFairValueDisclosureMember": {
     "auth_ref": [
      "r535"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measured at fair value for financial reporting purposes.",
        "label": "Portion at Fair Value Measurement [Member]",
        "terseLabel": "Portion at Fair Value Measurement"
       }
      }
     },
     "localname": "PortionAtFairValueFairValueDisclosureMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_PremiumsAndOtherReceivablesNet": {
     "auth_ref": [
      "r707"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of all premiums and other types of receivables due from other persons or entities.",
        "label": "Premiums and Other Receivables, Net",
        "netLabel": "Premiums, reinsurance and other receivables relating to variable interest entities",
        "terseLabel": "Premiums, reinsurance and other receivables (includes $4 and $3, respectively, relating to variable interest entities)",
        "verboseLabel": "Premiums, reinsurance and other receivables"
       }
      }
     },
     "localname": "PremiumsAndOtherReceivablesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_PremiumsEarnedNet": {
     "auth_ref": [
      "r655",
      "r709",
      "r728",
      "r773"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_Revenues",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned.",
        "label": "Premiums Earned, Net",
        "terseLabel": "Net premiums",
        "verboseLabel": "Premiums"
       }
      }
     },
     "localname": "PremiumsEarnedNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromAnnuitiesAndInvestmentCertificates": {
     "auth_ref": [
      "r88"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from an insurance contract under which the policy holder make a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date.",
        "label": "Proceeds from Annuities and Investment Certificates",
        "verboseLabel": "Policyholder account balances: Deposits"
       }
      }
     },
     "localname": "ProceedsFromAnnuitiesAndInvestmentCertificates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromCollectionOfLongtermLoansToRelatedParties": {
     "auth_ref": [
      "r82",
      "r577"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 18.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with collection, whether partial or full, of long-term loans to a related party. Alternate caption: Proceeds from Advances to Affiliates.",
        "label": "Proceeds from Collection of Long-term Loans to Related Parties",
        "terseLabel": "Receipts on loans to affiliates"
       }
      }
     },
     "localname": "ProceedsFromCollectionOfLongtermLoansToRelatedParties",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromIssuanceOfLongTermDebt": {
     "auth_ref": [
      "r88"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.",
        "label": "Proceeds from Issuance of Long-term Debt",
        "terseLabel": "Long-term debt issued"
       }
      }
     },
     "localname": "ProceedsFromIssuanceOfLongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromLimitedPartnershipInvestments": {
     "auth_ref": [
      "r83"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Cash inflow received as distributions, returns of capital, or sale proceeds from partnership interests held for investment purposes.",
        "label": "Proceeds from Limited Partnership Investments",
        "verboseLabel": "Sales, maturities and repayments of other limited partnership interests"
       }
      }
     },
     "localname": "ProceedsFromLimitedPartnershipInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromPaymentsForOtherFinancingActivities": {
     "auth_ref": [
      "r89",
      "r92",
      "r116"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 8.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow (outflow) from financing activities classified as other.",
        "label": "Proceeds from (Payments for) Other Financing Activities",
        "verboseLabel": "Other, net"
       }
      }
     },
     "localname": "ProceedsFromPaymentsForOtherFinancingActivities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromRealEstateAndRealEstateJointVentures": {
     "auth_ref": [
      "r84"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from the sale of real estate held-for-investment and real estate joint ventures.",
        "label": "Proceeds from Real Estate and Real Estate Joint Ventures",
        "verboseLabel": "Sales, maturities and repayments of real estate and real estate joint ventures"
       }
      }
     },
     "localname": "ProceedsFromRealEstateAndRealEstateJointVentures",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndCollectionOfMortgageNotesReceivable": {
     "auth_ref": [
      "r82"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from proceeds from sale of receivables arising from the mortgage note on real estate; includes collections on mortgage notes receivable that are not classified as operating cash flows.",
        "label": "Proceeds from Sale and Collection of Mortgage Notes Receivable",
        "verboseLabel": "Sales, maturities and repayments of mortgage loans"
       }
      }
     },
     "localname": "ProceedsFromSaleAndCollectionOfMortgageNotesReceivable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities": {
     "auth_ref": [
      "r81",
      "r82",
      "r205"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "label": "Proceeds from Sale and Maturity of Debt Securities, Available-for-sale",
        "verboseLabel": "Sales, maturities and repayments of fixed maturity securities available-for-sale"
       }
      }
     },
     "localname": "ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity": {
     "auth_ref": [
      "r83",
      "r205"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with the sale of equity securities classified as available-for-sale securities.",
        "label": "Proceeds from Sale of Available-for-sale Securities, Equity",
        "verboseLabel": "Sales, maturities and repayments of equity securities"
       }
      }
     },
     "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSaleOfInsuranceInvestments": {
     "auth_ref": [
      "r84"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow associated with the sale of insurance policy investment assets during the period.",
        "label": "Proceeds from Sale of Insurance Investments",
        "verboseLabel": "Proceeds"
       }
      }
     },
     "localname": "ProceedsFromSaleOfInsuranceInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProceedsFromSecuritizationsOfLoansHeldForInvestment": {
     "auth_ref": [
      "r82"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash inflow from the securitization of loans held for investment. Securitization is the structured process whereby interests in loans and other receivables are packaged, underwritten, and sold in the form of asset-backed securities.",
        "label": "Proceeds from Securitizations of Loans Held-for-investment",
        "terseLabel": "Proceeds from Securitizations of Loans Held-for-investment"
       }
      }
     },
     "localname": "ProceedsFromSecuritizationsOfLoansHeldForInvestment",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProfitLoss": {
     "auth_ref": [
      "r1",
      "r57",
      "r60",
      "r94",
      "r108",
      "r122",
      "r132",
      "r133",
      "r165",
      "r171",
      "r175",
      "r178",
      "r181",
      "r231",
      "r438",
      "r444",
      "r446",
      "r459",
      "r460",
      "r545",
      "r667"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": null,
       "parentTag": null,
       "root": true,
       "weight": null
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.",
        "label": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest",
        "terseLabel": "Net income (loss)",
        "totalLabel": "Net income (loss)",
        "verboseLabel": "Net income (loss)"
       }
      }
     },
     "localname": "ProfitLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ProvisionForLoanAndLeaseLosses": {
     "auth_ref": [
      "r99",
      "r192",
      "r664"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of expense related to estimated loss from loan and lease transactions.",
        "label": "Provision for Loan and Lease Losses",
        "terseLabel": "Provision (release)"
       }
      }
     },
     "localname": "ProvisionForLoanAndLeaseLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateAcquiredThroughForeclosure": {
     "auth_ref": [
      "r189",
      "r190"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.",
        "label": "Real Estate Acquired Through Foreclosure",
        "terseLabel": "Real Estate Acquired Through Foreclosure"
       }
      }
     },
     "localname": "RealEstateAcquiredThroughForeclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestmentFinancialStatementsDisclosureTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of nonconsolidated investments in real estate including interests in corporations, partnerships and joint ventures. Disclosures may include summarized aggregate financial statements for the real estate investments.",
        "label": "Real Estate Investment Financial Statements, Disclosure [Table Text Block]",
        "terseLabel": "Disclosure Real Estate and Real Estate Joint Ventures"
       }
      }
     },
     "localname": "RealEstateInvestmentFinancialStatementsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RealEstateInvestmentMember": {
     "auth_ref": [
      "r820",
      "r821",
      "r822",
      "r823"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This element represents direct equity investments in real estate projects (Land, buildings and improvements owned for income production and capital accretion potential) and certain loans accounted for as real estate investments. For loans accounted for as real estate investments, the entity (lender) has virtually the same risks and rewards as those of owners or joint venture participants. Such arrangements are treated as if the entity actually has an ownership interest in the property. In such arrangements, the entity (lender) participates in expected residual profits, which may be in the form of an equity kicker or a higher than usual effective interest rate. At the outset and during the construction and development of the property, the borrower generally has little or no equity in the property and the entity's (lender's) only source of repayment is the property. The entity (lender) generally (a) agrees to provide substantially all funds to acquire, develop, and construct the property, (b) funds the commitment or origination fees or both, and (c) funds interest during the development and construction of the property.",
        "label": "Real Estate Investment [Member]",
        "terseLabel": "Real estate and real estate joint ventures"
       }
      }
     },
     "localname": "RealEstateInvestmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RealEstateInvestmentPropertyNet": {
     "auth_ref": [
      "r702"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.",
        "label": "Real Estate Investment Property, Net",
        "terseLabel": "Real Estate Investment Property, Net"
       }
      }
     },
     "localname": "RealEstateInvestmentPropertyNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestments": {
     "auth_ref": [
      "r702"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 4.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of real estate investments, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; (7) other real estate investments; (8) real estate joint ventures; and (9) unconsolidated real estate and other joint ventures not separately presented.",
        "label": "Real Estate Investments, Net",
        "terseLabel": "Real estate and real estate joint ventures (includes $1,404 and $1,378, respectively, relating to variable interest entities and $147 and $127, respectively, under the fair value option)",
        "verboseLabel": "Real estate and real estate joint ventures relating to variable interest entities"
       }
      }
     },
     "localname": "RealEstateInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestmentsJointVentures": {
     "auth_ref": [
      "r702"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The book value of investments in real estate joint ventures including direct and indirect investments.",
        "label": "Real Estate Investments, Joint Ventures",
        "terseLabel": "Real estate joint ventures, Carrying Value"
       }
      }
     },
     "localname": "RealEstateInvestmentsJointVentures",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateInvestmentsOther": {
     "auth_ref": [
      "r702"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of real estate owned for income production and capital accretion potential, not otherwise specified in the existing taxonomy. Such real estate excludes that which is occupied or used in the business, for entertainment purposes, or held in inventory for specific purposes.",
        "label": "Real Estate Investments, Other",
        "terseLabel": "Other real estate investments, Carrying Value"
       }
      }
     },
     "localname": "RealEstateInvestmentsOther",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealEstateLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Real Estate [Line Items]",
        "terseLabel": "Real Estate [Line Items]"
       }
      }
     },
     "localname": "RealEstateLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RealEstateTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about real estate investment companies including, but not limited to, real estate investment trusts, real estate owned, retail land sales, and time share transactions.",
        "label": "Real Estate [Table]",
        "terseLabel": "Real Estate [Table]"
       }
      }
     },
     "localname": "RealEstateTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails",
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RealizedInvestmentGainsLosses": {
     "auth_ref": [
      "r722"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of realized gain (loss) on investment.",
        "label": "Realized Investment Gains (Losses)",
        "terseLabel": "Net investment gains (losses)"
       }
      }
     },
     "localname": "RealizedInvestmentGainsLosses",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RealizedInvestmentGainsLossesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Realized Investment Gains (Losses) [Abstract]",
        "verboseLabel": "Other net investment gains (losses):"
       }
      }
     },
     "localname": "RealizedInvestmentGainsLossesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReceivablesFairValueDisclosure": {
     "auth_ref": [
      "r18",
      "r32",
      "r649",
      "r698"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.",
        "label": "Receivables, Fair Value Disclosure",
        "verboseLabel": "Premiums, reinsurance and other receivables"
       }
      }
     },
     "localname": "ReceivablesFairValueDisclosure",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]",
        "terseLabel": "Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]"
       }
      }
     },
     "localname": "ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax": {
     "auth_ref": [
      "r54",
      "r56",
      "r553",
      "r557",
      "r559"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount before tax of reclassification adjustments of other comprehensive income (loss).",
        "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax",
        "negatedLabel": "Amounts reclassified from AOCI"
       }
      }
     },
     "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": {
     "auth_ref": [
      "r54",
      "r56",
      "r63",
      "r553",
      "r557",
      "r559"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).",
        "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax",
        "negatedLabel": "Amounts reclassified from AOCI, net of income tax"
       }
      }
     },
     "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReclassificationFromAociCurrentPeriodTax": {
     "auth_ref": [
      "r52",
      "r55"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).",
        "label": "Reclassification from AOCI, Current Period, Tax",
        "negatedLabel": "Deferred income tax benefit (expense)"
       }
      }
     },
     "localname": "ReclassificationFromAociCurrentPeriodTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification out of Accumulated Other Comprehensive Income [Axis]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Axis]"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification out of Accumulated Other Comprehensive Income [Domain]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Domain]"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Identifies item reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification out of Accumulated Other Comprehensive Income [Member]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about items reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification out of Accumulated Other Comprehensive Income [Table]",
        "terseLabel": "Reclassification out of Accumulated Other Comprehensive Income [Table]"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss).",
        "label": "Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]",
        "verboseLabel": "Reclassification out of Accumulated Other Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ReinsuranceCostsAndRecoveriesNet": {
     "auth_ref": [
      "r678"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of recovery (expense) related to provision for policy benefits and costs incurred for policies assumed and ceded.",
        "label": "Policyholder Benefits and Claims Incurred, Assumed and Ceded",
        "terseLabel": "Net policyholder benefits and claims"
       }
      }
     },
     "localname": "ReinsuranceCostsAndRecoveriesNet",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceDisclosuresAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Reinsurance Disclosures [Abstract]",
        "terseLabel": "Reinsurance Disclosures [Abstract]"
       }
      }
     },
     "localname": "ReinsuranceDisclosuresAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed": {
     "auth_ref": [
      "r678"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of policy benefits and costs incurred for policies assumed.",
        "label": "Policyholder Benefits and Claims Incurred, Assumed",
        "verboseLabel": "Reinsurance assumed"
       }
      }
     },
     "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded": {
     "auth_ref": [
      "r678"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of reduction of provision for policy benefits and costs incurred for policies ceded.",
        "label": "Policyholder Benefits and Claims Incurred, Ceded",
        "negatedLabel": "Reinsurance ceded"
       }
      }
     },
     "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ReinsuranceRecoverables": {
     "auth_ref": [
      "r679",
      "r699",
      "r733"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.",
        "label": "Reinsurance Recoverables, Including Reinsurance Premium Paid",
        "periodEndLabel": "Add: Reinsurance recoverables",
        "periodStartLabel": "Less: Reinsurance recoverables"
       }
      }
     },
     "localname": "ReinsuranceRecoverables",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyDomain": {
     "auth_ref": [
      "r369",
      "r577",
      "r578"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Related parties include affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Domain]",
        "terseLabel": "Related Party [Domain]"
       }
      }
     },
     "localname": "RelatedPartyDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionAxis": {
     "auth_ref": [
      "r369",
      "r577",
      "r578",
      "r580"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of related party transaction.",
        "label": "Related Party Transaction [Axis]",
        "terseLabel": "Related Party Transaction [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionDomain": {
     "auth_ref": [
      "r369"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Transaction between related party.",
        "label": "Related Party Transaction [Domain]",
        "terseLabel": "Related Party Transaction [Domain]"
       }
      }
     },
     "localname": "RelatedPartyTransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RelatedPartyTransactionDueFromToRelatedParty": {
     "auth_ref": [
      "r111",
      "r578"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.",
        "label": "Related Party Transaction, Due from (to) Related Party",
        "verboseLabel": "Net receivables (payables) due from (to) affiliates"
       }
      }
     },
     "localname": "RelatedPartyTransactionDueFromToRelatedParty",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionDueFromToRelatedPartyAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Related Party Transaction, Due from (to) Related Party [Abstract]",
        "terseLabel": "Related Party Transaction, Due from (to) Related Party [Abstract]"
       }
      }
     },
     "localname": "RelatedPartyTransactionDueFromToRelatedPartyAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Related Party Transaction [Line Items]",
        "terseLabel": "Related Party Transaction [Line Items]"
       }
      }
     },
     "localname": "RelatedPartyTransactionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.",
        "label": "Related Party Transaction, Other Revenues from Transactions with Related Party",
        "terseLabel": "Related Party Transaction, Other Revenues from Transactions with Related Party"
       }
      }
     },
     "localname": "RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RelatedPartyTransactionsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Related Party Transactions [Abstract]",
        "terseLabel": "Related Party Transactions [Abstract]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsByRelatedPartyAxis": {
     "auth_ref": [
      "r369",
      "r577",
      "r580",
      "r625",
      "r626",
      "r627",
      "r628",
      "r629",
      "r630",
      "r631",
      "r632",
      "r633",
      "r634",
      "r635",
      "r636"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests.",
        "label": "Related Party [Axis]",
        "terseLabel": "Related Party Transactions, by Related Party [Axis]",
        "verboseLabel": "Related Party [Axis]"
       }
      }
     },
     "localname": "RelatedPartyTransactionsByRelatedPartyAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonBalanceSheetsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsEffectsofAffiliatedReinsuranceonStatementsofOperationsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": {
     "auth_ref": [
      "r575",
      "r576",
      "r578",
      "r581",
      "r582"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Related Party Transactions Disclosure [Text Block]",
        "verboseLabel": "Related Party Transactions"
       }
      }
     },
     "localname": "RelatedPartyTransactionsDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/RelatedPartyTransactions"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_RentalProperties": {
     "auth_ref": [
      "r702"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount of income producing properties held for rental.",
        "label": "Rental Properties",
        "terseLabel": "Leased real estate investments, Carrying Value"
       }
      }
     },
     "localname": "RentalProperties",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRealEstateandRealEstateJointVenturesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfAnnuitiesAndInvestmentCertificates": {
     "auth_ref": [
      "r91"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cash outflow for an insurance contract under which the policy holder make a lump sum payment or a series of payments in exchange for periodic payments to the policyholder beginning immediately or at some future date.",
        "label": "Repayments of Annuities and Investment Certificates",
        "negatedLabel": "Policyholder account balances: Withdrawals"
       }
      }
     },
     "localname": "RepaymentsOfAnnuitiesAndInvestmentCertificates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepaymentsOfOtherLongTermDebt": {
     "auth_ref": [
      "r91"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities",
       "weight": -1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.",
        "label": "Repayments of Other Long-term Debt",
        "negatedLabel": "Long-term debt repaid"
       }
      }
     },
     "localname": "RepaymentsOfOtherLongTermDebt",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RepurchaseAgreementsMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investments represented by an agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Such agreements are generally short-term in nature.",
        "label": "Repurchase Agreements [Member]",
        "terseLabel": "Repurchase Agreements"
       }
      }
     },
     "localname": "RepurchaseAgreementsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ResidentialMortgageBackedSecuritiesMember": {
     "auth_ref": [
      "r207",
      "r344"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Securities collateralized by residential real estate mortgage loans.",
        "label": "Residential Mortgage Backed Securities [Member]",
        "terseLabel": "RMBS"
       }
      }
     },
     "localname": "ResidentialMortgageBackedSecuritiesMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ResidentialPortfolioSegmentMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Portfolio segment of the company's total financing receivables related to residential financing receivables.",
        "label": "Residential Portfolio Segment [Member]",
        "terseLabel": "Residential Mortgage Loans"
       }
      }
     },
     "localname": "ResidentialPortfolioSegmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsPurchasedInvestmentswithCreditDeteriorationDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetainedEarningsAccumulatedDeficit": {
     "auth_ref": [
      "r13",
      "r306",
      "r416",
      "r694",
      "r760",
      "r765"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_StockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings (Accumulated Deficit)",
        "terseLabel": "Retained Earnings (Accumulated Deficit)",
        "verboseLabel": "Retained earnings"
       }
      }
     },
     "localname": "RetainedEarningsAccumulatedDeficit",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RetainedEarningsMember": {
     "auth_ref": [
      "r118",
      "r119",
      "r120",
      "r123",
      "r131",
      "r133",
      "r237",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428",
      "r756",
      "r758"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.",
        "label": "Retained Earnings [Member]",
        "terseLabel": "Retained Earnings"
       }
      }
     },
     "localname": "RetainedEarningsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RetirementPlanTypeAxis": {
     "auth_ref": [
      "r318",
      "r319",
      "r320",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337",
      "r338",
      "r339",
      "r340",
      "r341",
      "r342",
      "r343",
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r364",
      "r365",
      "r366",
      "r367",
      "r369",
      "r372",
      "r376",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r395",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r403",
      "r404",
      "r405",
      "r406"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Axis]",
        "terseLabel": "Retirement Plan Type [Axis]"
       }
      }
     },
     "localname": "RetirementPlanTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RetirementPlanTypeDomain": {
     "auth_ref": [
      "r318",
      "r319",
      "r320",
      "r322",
      "r323",
      "r324",
      "r325",
      "r326",
      "r327",
      "r328",
      "r329",
      "r330",
      "r331",
      "r332",
      "r333",
      "r334",
      "r335",
      "r336",
      "r337",
      "r338",
      "r339",
      "r340",
      "r341",
      "r342",
      "r343",
      "r344",
      "r346",
      "r347",
      "r348",
      "r349",
      "r350",
      "r351",
      "r352",
      "r353",
      "r354",
      "r355",
      "r356",
      "r357",
      "r358",
      "r359",
      "r360",
      "r361",
      "r362",
      "r363",
      "r364",
      "r365",
      "r366",
      "r367",
      "r369",
      "r372",
      "r376",
      "r379",
      "r380",
      "r381",
      "r382",
      "r383",
      "r384",
      "r385",
      "r386",
      "r387",
      "r388",
      "r389",
      "r390",
      "r395",
      "r396",
      "r397",
      "r398",
      "r399",
      "r400",
      "r403",
      "r404",
      "r405",
      "r406"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.",
        "label": "Retirement Plan Type [Domain]",
        "terseLabel": "Retirement Plan Type [Domain]"
       }
      }
     },
     "localname": "RetirementPlanTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revenue from Contract with Customer [Abstract]",
        "terseLabel": "Revenue from Contract with Customer [Abstract]"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": {
     "auth_ref": [
      "r156",
      "r157",
      "r170",
      "r176",
      "r177",
      "r183",
      "r184",
      "r186",
      "r308",
      "r309",
      "r621"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.",
        "label": "Revenue from Contract with Customer, Excluding Assessed Tax",
        "terseLabel": "Revenue from Contract with Customer, Excluding Assessed Tax"
       }
      }
     },
     "localname": "RevenueFromContractWithCustomerExcludingAssessedTax",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_Revenues": {
     "auth_ref": [
      "r64",
      "r108",
      "r156",
      "r157",
      "r170",
      "r176",
      "r177",
      "r183",
      "r184",
      "r186",
      "r231",
      "r545",
      "r667"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited": {
       "order": 1.0,
       "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest",
       "weight": 1.0
      },
      "http://www.metlife.com/role/SegmentInformationEarningsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_OperatingIncomeLoss",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).",
        "label": "Revenues",
        "terseLabel": "Revenues",
        "totalLabel": "Total revenues",
        "verboseLabel": "Total revenues"
       }
      }
     },
     "localname": "Revenues",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RevenuesAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Revenues [Abstract]",
        "verboseLabel": "Revenues"
       }
      }
     },
     "localname": "RevenuesAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited",
      "http://www.metlife.com/role/SegmentInformationEarningsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability": {
     "auth_ref": [
      "r568",
      "r569"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of increase in right-of-use asset obtained in exchange for operating lease liability.",
        "label": "Right-of-Use Asset Obtained in Exchange for Operating Lease Liability",
        "terseLabel": "Operating lease liability associated with the recognition of right-of-use assets"
       }
      }
     },
     "localname": "RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_RisksInherentInServicingAssetsAndServicingLiabilitiesTypeDomain": {
     "auth_ref": [
      "r604"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The nature of risks inherent in servicing assets and servicing liabilities.",
        "label": "Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain]",
        "terseLabel": "Risks Inherent in Servicing Assets and Servicing Liabilities, Type [Domain]"
       }
      }
     },
     "localname": "RisksInherentInServicingAssetsAndServicingLiabilitiesTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable": {
     "auth_ref": [
      "r28"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule itemizing specific types of trade accounts and notes receivable, and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.",
        "label": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table]",
        "terseLabel": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table]"
       }
      }
     },
     "localname": "ScheduleOfAccountsNotesLoansAndFinancingReceivableTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsACLRollforwardbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofAgriculturalandResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsCreditQualityofCommercialMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsPastDueandInterestAccrualStatusofMortgageLoansDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock": {
     "auth_ref": [
      "r28"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.",
        "label": "Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]",
        "verboseLabel": "Disclosure of Mortgage Loans Net of Valuation Allowance"
       }
      }
     },
     "localname": "ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": {
     "auth_ref": [
      "r54",
      "r558",
      "r559"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).",
        "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]",
        "verboseLabel": "Components of Accumulated Other Comprehensive Income (Loss)"
       }
      }
     },
     "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EquityTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Debt Securities, Available-for-sale [Line Items]",
        "terseLabel": "Debt Securities, Available-for-sale [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfAvailableForSaleSecuritiesTable": {
     "auth_ref": [
      "r213",
      "r218",
      "r223",
      "r224",
      "r225",
      "r226",
      "r669",
      "r670"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.",
        "label": "Schedule of Available-for-sale Securities [Table]",
        "terseLabel": "Schedule of Available-for-sale Securities [Table]"
       }
      }
     },
     "localname": "ScheduleOfAvailableForSaleSecuritiesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfClosedBlockAssetsAndLiabilities": {
     "auth_ref": [
      "r792",
      "r805"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of summarized financial data of the closed block, typically including the liabilities of the closed block, assets allocated thereto, and maximum expected future earnings from the operations thereof.",
        "label": "Schedule of Closed Block Assets and Liabilities [Table Text Block]",
        "verboseLabel": "Closed block liabilities and assets"
       }
      }
     },
     "localname": "ScheduleOfClosedBlockAssetsAndLiabilities",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ClosedBlockTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfCreditDerivativesTable": {
     "auth_ref": [
      "r497",
      "r502",
      "r503"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of credit derivatives, including information about each credit derivative, or each group of similar credit derivatives, including (a) the nature of the credit derivative - its term, how it arose, the events or circumstances that would require the seller to perform under the credit derivative, and the current status of the payment/performance risk of the credit derivative; (b) the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative; (c) the current fair value of the credit derivative; and (d) the nature of any recourse provisions under the credit derivative, and any assets held either as collateral or by third parties.",
        "label": "Schedule of Credit Derivatives [Table]",
        "terseLabel": "Schedule of Credit Derivatives [Table]"
       }
      }
     },
     "localname": "ScheduleOfCreditDerivativesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditDerivativesDetails",
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable": {
     "auth_ref": [
      "r375",
      "r376",
      "r377",
      "r378",
      "r389"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosures about an individual defined benefit pension plan or an other postretirement defined benefit plan. It may be appropriate to group certain similar plans.  Also includes schedule for fair value of plan assets by major categories of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Schedule of Defined Benefit Plans Disclosures [Table]",
        "terseLabel": "Schedule of Defined Benefit Plans Disclosures [Table]"
       }
      }
     },
     "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock": {
     "auth_ref": [
      "r473",
      "r482",
      "r490"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments.",
        "label": "Derivative Instruments, Gain (Loss) [Table Text Block]",
        "verboseLabel": "Components of Net Derivatives Gains (Losses)"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativeInstrumentsTextBlock": {
     "auth_ref": [
      "r464",
      "r466",
      "r467",
      "r470",
      "r471",
      "r480",
      "r482",
      "r504",
      "r508"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.",
        "label": "Schedule of Derivative Instruments [Table Text Block]",
        "verboseLabel": "Schedule of Derivative Instruments"
       }
      }
     },
     "localname": "ScheduleOfDerivativeInstrumentsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock": {
     "auth_ref": [
      "r475"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of derivative instruments (including nonderivative instruments that are designated and qualify as hedging instruments) of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position.",
        "label": "Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]",
        "verboseLabel": "Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location"
       }
      }
     },
     "localname": "ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": {
     "auth_ref": [
      "r517",
      "r518"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).",
        "label": "Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]",
        "verboseLabel": "Recurring Fair Value Measurements"
       }
      }
     },
     "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock": {
     "auth_ref": [
      "r481"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure for fair value hedging instruments of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position.",
        "label": "Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]",
        "verboseLabel": "Net derivatives gains (losses) recognized on fair value derivatives and the related hedged items"
       }
      }
     },
     "localname": "ScheduleOfFairValueHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable": {
     "auth_ref": [
      "r536",
      "r537"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule detailing the information required and determined to be disclosed regarding the fair value of financial assets and financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.",
        "label": "Schedule of Fair Value, Off-balance Sheet Risks [Table]",
        "terseLabel": "Schedule of Fair Value, Off-balance Sheet Risks [Table]"
       }
      }
     },
     "localname": "ScheduleOfFairValueOffBalanceSheetRisksTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock": {
     "auth_ref": [
      "r597",
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities.",
        "label": "Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]",
        "verboseLabel": "Invested Assets on Deposit, Held in Trust and Pledged as Collateral"
       }
      }
     },
     "localname": "ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock": {
     "auth_ref": [
      "r200",
      "r251"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of financing receivable on nonaccrual status.",
        "label": "Financing Receivable, Nonaccrual [Table Text Block]",
        "verboseLabel": "Schedule of Past Due and Non Accrual Mortgage Loans"
       }
      }
     },
     "localname": "ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Net Investment Income [Line Items]",
        "terseLabel": "Net Investment Income [Line Items]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable": {
     "auth_ref": [
      "r77",
      "r79",
      "r721"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of information about investment income, including, but not limited to, interest and dividend income and amortization of discount (premium) derived from debt and equity securities. Excludes realized and unrealized gain (loss) on investments.",
        "label": "Investment Income [Table]",
        "terseLabel": "Investment Income [Table]"
       }
      }
     },
     "localname": "ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r742"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims.",
        "label": "Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]",
        "verboseLabel": "Liabilities for Unpaid Claims and Claim Expenses"
       }
      }
     },
     "localname": "ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock": {
     "auth_ref": [
      "r680",
      "r778"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the guaranteed benefits in excess of the current account balance, quantifies such excesses (the net amounts at risk) and includes other relevant, pertinent information as of the most recent balance sheet date by product type.",
        "label": "Schedule of Net Amount of Risk by Product and Guarantee [Table Text Block]",
        "verboseLabel": "Guarantees related to Annuity, Universal and Variable Life Contracts"
       }
      }
     },
     "localname": "ScheduleOfNetAmountOfRiskByProductAndGuaranteeTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfNetBenefitCostsTableTextBlock": {
     "auth_ref": [
      "r355"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.",
        "label": "Schedule of Net Benefit Costs [Table Text Block]",
        "verboseLabel": "Net periodic benefit costs"
       }
      }
     },
     "localname": "ScheduleOfNetBenefitCostsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/EmployeeBenefitPlansTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock": {
     "auth_ref": [
      "r75"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement.",
        "label": "Schedule of Other Operating Cost and Expense, by Component [Table Text Block]",
        "verboseLabel": "Other Expenses"
       }
      }
     },
     "localname": "ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherRevenuesandOtherExpensesTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable": {
     "auth_ref": [
      "r110",
      "r579",
      "r580"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule of quantitative and qualitative information pertaining to related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.",
        "label": "Schedule of Related Party Transactions, by Related Party [Table]",
        "terseLabel": "Schedule of Related Party Transactions, by Related Party [Table]"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsByRelatedPartyTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails",
      "http://www.metlife.com/role/RelatedPartyTransactionsServiceAgreementsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates.",
        "label": "Schedule of Related Party Transactions [Table Text Block]",
        "terseLabel": "Schedule of Related Party Transactions"
       }
      }
     },
     "localname": "ScheduleOfRelatedPartyTransactionsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSecuritiesFinancingTransactionsTextBlock": {
     "auth_ref": [
      "r41",
      "r114",
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of  securities financing transactions including resale and repurchase agreements, securities borrowed and lending transactions, securities received as collateral and obligations to return securities received as collateral.",
        "label": "Schedule of Securities Financing Transactions [Table Text Block]",
        "verboseLabel": "Securities Lending and Repurchase Agreements"
       }
      }
     },
     "localname": "ScheduleOfSecuritiesFinancingTransactionsTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": {
     "auth_ref": [
      "r165",
      "r168",
      "r174",
      "r279"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table]",
        "terseLabel": "Schedule of Segment Reporting Information, by Segment [Table]"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": {
     "auth_ref": [
      "r165",
      "r168",
      "r174",
      "r279"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.",
        "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]",
        "verboseLabel": "Segment Reporting Information, by Segment"
       }
      }
     },
     "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock": {
     "auth_ref": [
      "r223"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).",
        "label": "Schedule of Unrealized Loss on Investments [Table Text Block]",
        "verboseLabel": "Continuous Gross Unrealized Loss and OTTI Loss for Fixed Maturity Securities Available-for-Sale"
       }
      }
     },
     "localname": "ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ScheduleOfVariableInterestEntitiesTable": {
     "auth_ref": [
      "r441",
      "r442",
      "r449",
      "r450",
      "r451",
      "r453",
      "r454",
      "r456",
      "r457"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of qualitative and quantitative information related to variable interests the entity holds, whether or not such variable interest entity (VIE) is included in the reporting entity's consolidated financial statements. Includes, but is not limited to, description of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a tabular comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.",
        "label": "Schedule of Variable Interest Entities [Table]",
        "terseLabel": "Schedule of Variable Interest Entities [Table]"
       }
      }
     },
     "localname": "ScheduleOfVariableInterestEntitiesTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ScheduleOfVariableInterestEntitiesTextBlock": {
     "auth_ref": [
      "r451",
      "r453",
      "r454",
      "r456",
      "r457"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.",
        "label": "Schedule of Variable Interest Entities [Table Text Block]",
        "terseLabel": "Schedule of Variable Interest Entities"
       }
      }
     },
     "localname": "ScheduleOfVariableInterestEntitiesTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionAxis": {
     "auth_ref": [
      "r33",
      "r114",
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of securities financing transactions, including, but not limited to those measured at fair value or cost.",
        "label": "Securities Financing Transaction [Axis]",
        "terseLabel": "Securities Financing Transaction [Axis]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionFairValueMember": {
     "auth_ref": [
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement at fair value of security or securities involved in financing transaction.",
        "label": "Securities Financing Transaction, Fair Value [Member]",
        "terseLabel": "Estimated fair value"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionFairValueMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Securities Financing Transaction [Line Items]",
        "terseLabel": "Securities Financing Transaction [Line Items]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionTable": {
     "auth_ref": [
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule, as of the balance sheet date, of security financing transactions by type, the aggregate value of securities financing transactions by type and aggregate acquisition price by type of security financing transaction.",
        "label": "Securities Financing Transaction [Table]",
        "terseLabel": "Securities Financing Transaction [Table]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SecuritiesFinancingTransactionTypeDomain": {
     "auth_ref": [
      "r602"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Measurement of financing transaction securities held.",
        "label": "Securities Financing Transaction [Domain]",
        "terseLabel": "Securities Financing Transaction [Domain]",
        "verboseLabel": "Securities Financing Transaction [Domain]"
       }
      }
     },
     "localname": "SecuritiesFinancingTransactionTypeDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SecuritiesHeldAsCollateralAtFairValue": {
     "auth_ref": [
      "r197"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.",
        "label": "Securities Held as Collateral, at Fair Value",
        "terseLabel": "Invested assets pledged as collateral (1)"
       }
      }
     },
     "localname": "SecuritiesHeldAsCollateralAtFairValue",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsInvestedAssetsonDepositHeldInTrustandPledgedasCollateralDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SecuritiesInvestmentMember": {
     "auth_ref": [
      "r808"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This member categorizes all investments in securities to segregate them from other than security investments.",
        "label": "Securities Investment [Member]",
        "terseLabel": "Securities investment"
       }
      }
     },
     "localname": "SecuritiesInvestmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SecuritiesLoaned": {
     "auth_ref": [
      "r36",
      "r42",
      "r598"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after the effects of master netting arrangements, of securities loaned to entities in exchange for collateral. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "label": "Securities Loaned",
        "verboseLabel": "Securities loaned"
       }
      }
     },
     "localname": "SecuritiesLoaned",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SecuritiesReceivedAsCollateral": {
     "auth_ref": [
      "r599"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The carrying value as of the balance sheet date of the assets received as collateral against securities loaned to other broker-dealers. Borrowers of securities generally are required to provide collateral to the lenders of securities, commonly cash but sometimes other securities or standby letters of credit, with a value slightly higher than that of the securities borrowed. In instances where the entity is permitted to sell or re-pledge these securities, the entity reports the fair value of the collateral received and the related obligation to return the collateral as a liability.",
        "label": "Securities Received as Collateral",
        "verboseLabel": "Security collateral on deposit from counterparties"
       }
      }
     },
     "localname": "SecuritiesReceivedAsCollateral",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SecuritiesSoldUnderAgreementsToRepurchase": {
     "auth_ref": [
      "r33",
      "r36",
      "r42",
      "r112",
      "r650"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "label": "Securities Sold under Agreements to Repurchase",
        "terseLabel": "Securities Sold under Agreements to Repurchase"
       }
      }
     },
     "localname": "SecuritiesSoldUnderAgreementsToRepurchase",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SegmentDomain": {
     "auth_ref": [
      "r152",
      "r156",
      "r157",
      "r158",
      "r159",
      "r160",
      "r161",
      "r162",
      "r163",
      "r164",
      "r165",
      "r166",
      "r167",
      "r170",
      "r171",
      "r172",
      "r173",
      "r175",
      "r176",
      "r177",
      "r178",
      "r179",
      "r181",
      "r186",
      "r743"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.",
        "label": "Segments [Domain]",
        "terseLabel": "Segments [Domain]"
       }
      }
     },
     "localname": "SegmentDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_SegmentReportingAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Segment Reporting [Abstract]",
        "terseLabel": "Segment Reporting [Abstract]"
       }
      }
     },
     "localname": "SegmentReportingAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_SegmentReportingDisclosureTextBlock": {
     "auth_ref": [
      "r152",
      "r154",
      "r155",
      "r165",
      "r169",
      "r175",
      "r179",
      "r180",
      "r181",
      "r182",
      "r183",
      "r185",
      "r186",
      "r187"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.",
        "label": "Segment Reporting Disclosure [Text Block]",
        "verboseLabel": "Segment Information"
       }
      }
     },
     "localname": "SegmentReportingDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformation"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SegmentReportingInformationLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Segment Reporting Information [Line Items]",
        "terseLabel": "Segment Reporting Information [Line Items]"
       }
      }
     },
     "localname": "SegmentReportingInformationLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SellingAndMarketingExpense": {
     "auth_ref": [],
     "calculation": {
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails": {
       "order": 4.0,
       "parentTag": "us-gaap_OperatingExpenses",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The aggregate total amount of expenses directly related to the marketing or selling of products or services.",
        "label": "Selling and Marketing Expense",
        "terseLabel": "Commissions and other variable expenses"
       }
      }
     },
     "localname": "SellingAndMarketingExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/OtherExpensesOtherExpensesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SeparateAccountAssets": {
     "auth_ref": [
      "r688",
      "r775",
      "r783",
      "r788"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_Assets",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of asset at fair value held for benefit of separate account policyholder.",
        "label": "Separate Account Asset",
        "verboseLabel": "Separate account assets"
       }
      }
     },
     "localname": "SeparateAccountAssets",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SeparateAccountsLiability": {
     "auth_ref": [
      "r692",
      "r775",
      "r785",
      "r786",
      "r789"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 11.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account.",
        "label": "Separate Account, Liability",
        "verboseLabel": "Separate account liabilities"
       }
      }
     },
     "localname": "SeparateAccountsLiability",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/FairValueFinancialInstrumentsCarriedatOtherThanFairValueDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortTermBorrowings": {
     "auth_ref": [
      "r5",
      "r641",
      "r690"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 7.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.",
        "label": "Short-term Debt",
        "verboseLabel": "Short-term debt"
       }
      }
     },
     "localname": "ShortTermBorrowings",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortTermInvestments": {
     "auth_ref": [
      "r7",
      "r645",
      "r646",
      "r686"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 5.0,
       "parentTag": "us-gaap_Investments",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.",
        "label": "Short-term Investments",
        "terseLabel": "Short-term investments",
        "verboseLabel": "Short-term investments at estimated fair value"
       }
      }
     },
     "localname": "ShortTermInvestments",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_ShortTermInvestmentsMember": {
     "auth_ref": [
      "r820",
      "r821",
      "r822",
      "r823"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Investments which are not otherwise included in another category or item that the entity has the intent to sell or dispose of within one year from the date of the balance sheet.",
        "label": "Short-term Investments [Member]",
        "terseLabel": "Short-term Investments"
       }
      }
     },
     "localname": "ShortTermInvestmentsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsRecurringRelatedPartyInvestmentsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StatementBusinessSegmentsAxis": {
     "auth_ref": [
      "r0",
      "r152",
      "r156",
      "r157",
      "r158",
      "r159",
      "r160",
      "r161",
      "r162",
      "r163",
      "r164",
      "r165",
      "r166",
      "r167",
      "r170",
      "r171",
      "r172",
      "r173",
      "r175",
      "r176",
      "r177",
      "r178",
      "r179",
      "r181",
      "r186",
      "r279",
      "r282",
      "r283",
      "r284",
      "r743"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by business segments.",
        "label": "Segments [Axis]",
        "terseLabel": "Segments [Axis]"
       }
      }
     },
     "localname": "StatementBusinessSegmentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/SegmentInformationEarningsDetails",
      "http://www.metlife.com/role/SegmentInformationTotalAssetsDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementEquityComponentsAxis": {
     "auth_ref": [
      "r27",
      "r118",
      "r119",
      "r120",
      "r123",
      "r131",
      "r133",
      "r141",
      "r237",
      "r305",
      "r306",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428",
      "r553",
      "r554",
      "r555",
      "r556",
      "r557",
      "r559",
      "r756",
      "r757",
      "r758"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by component of equity.",
        "label": "Equity Components [Axis]",
        "terseLabel": "Equity Components [Axis]",
        "verboseLabel": "Equity Components [Axis]"
       }
      }
     },
     "localname": "StatementEquityComponentsAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/DerivativesDerivativesEffectsontheConsolidatedStatementofOperationsandComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails",
      "http://www.metlife.com/role/EquityReclassificationsOutofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Statement [Line Items]",
        "terseLabel": "Statement [Line Items]"
       }
      }
     },
     "localname": "StatementLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfCashFlowsAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Cash Flows [Abstract]",
        "terseLabel": "Statement of Cash Flows [Abstract]"
       }
      }
     },
     "localname": "StatementOfCashFlowsAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfFinancialPositionAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Financial Position [Abstract]",
        "terseLabel": "Statement of Financial Position [Abstract]"
       }
      }
     },
     "localname": "StatementOfFinancialPositionAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementOfStockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Statement of Stockholders' Equity [Abstract]",
        "terseLabel": "Statement of Stockholders' Equity [Abstract]"
       }
      }
     },
     "localname": "StatementOfStockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "xbrltype": "stringItemType"
    },
    "us-gaap_StatementTable": {
     "auth_ref": [
      "r118",
      "r119",
      "r120",
      "r141",
      "r621"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.",
        "label": "Statement [Table]",
        "terseLabel": "Statement [Table]"
       }
      }
     },
     "localname": "StatementTable",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited",
      "http://www.metlife.com/role/RelatedPartyTransactionsReinsuranceTransactionsNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockOptionMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts conveying rights, but not obligations, to buy or sell a specific quantity of stock at a specified price during a specified period (an American option) or at a specified date (a European option).",
        "label": "Equity Option [Member]",
        "verboseLabel": "Equity index options"
       }
      }
     },
     "localname": "StockOptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_StockholdersEquity": {
     "auth_ref": [
      "r10",
      "r15",
      "r16",
      "r108",
      "r202",
      "r231",
      "r545"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 2.0,
       "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.",
        "label": "Stockholders' Equity Attributable to Parent",
        "totalLabel": "Total Metropolitan Life Insurance Company stockholder\u2019s equity"
       }
      }
     },
     "localname": "StockholdersEquity",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders' Equity Attributable to Parent [Abstract]",
        "verboseLabel": "Metropolitan Life Insurance Company stockholder\u2019s equity:"
       }
      }
     },
     "localname": "StockholdersEquityAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": {
     "auth_ref": [
      "r108",
      "r118",
      "r119",
      "r120",
      "r123",
      "r131",
      "r231",
      "r237",
      "r306",
      "r413",
      "r414",
      "r415",
      "r427",
      "r428",
      "r436",
      "r437",
      "r458",
      "r545",
      "r553",
      "r554",
      "r559",
      "r757",
      "r758"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 3.0,
       "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.",
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest",
        "periodEndLabel": "Ending Balance",
        "periodStartLabel": "Beginning Balance",
        "totalLabel": "Total equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited",
      "http://www.metlife.com/role/ConsolidatedStatementsofEquityUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]",
        "verboseLabel": "Equity"
       }
      }
     },
     "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_StockholdersEquityNoteDisclosureTextBlock": {
     "auth_ref": [
      "r107",
      "r306",
      "r307"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.",
        "label": "Stockholders' Equity Note Disclosure [Text Block]",
        "verboseLabel": "Equity"
       }
      }
     },
     "localname": "StockholdersEquityNoteDisclosureTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/Equity"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_SupplementalCashFlowInformationAbstract": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "label": "Supplemental Cash Flow Information [Abstract]",
        "verboseLabel": "Supplemental disclosures of cash flow information"
       }
      }
     },
     "localname": "SupplementalCashFlowInformationAbstract",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedStatementsofCashFlowsUnaudited"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r739"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": 1.0,
       "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs.",
        "label": "Current Year Claims and Claims Adjustment Expense",
        "verboseLabel": "Current period"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense": {
     "auth_ref": [
      "r739"
     ],
     "calculation": {
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails": {
       "order": 2.0,
       "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1",
       "weight": 1.0
      }
     },
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.",
        "label": "Prior Year Claims and Claims Adjustment Expense",
        "verboseLabel": "Prior periods\u00a0(1)"
       }
      }
     },
     "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceRollforwardofUnpaidClaimsDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TaxesPayableCurrent": {
     "auth_ref": [
      "r21"
     ],
     "calculation": {
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited": {
       "order": 12.0,
       "parentTag": "us-gaap_Liabilities",
       "weight": 1.0
      }
     },
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).",
        "label": "Taxes Payable, Current",
        "terseLabel": "Current income tax payable"
       }
      }
     },
     "localname": "TaxesPayableCurrent",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnaudited"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TotalReturnSwapMember": {
     "auth_ref": [
      "r462"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contracts in which one party makes payments at a fixed or variable rate while the counterparty makes payments based on an asset, including the income and capital gains derived therefrom.",
        "label": "Total Return Swap [Member]",
        "terseLabel": "Equity total return swaps"
       }
      }
     },
     "localname": "TotalReturnSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss": {
     "auth_ref": [],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.",
        "label": "Trading Securities, Change in Unrealized Holding Gain (Loss)",
        "terseLabel": "FVO securities, Change in Unrealized Holding Gain (Loss)"
       }
      }
     },
     "localname": "TradingSecuritiesUnrealizedHoldingGainLoss",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsNetInvestmentIncomeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransactionDomain": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Agreement between buyer and seller for the exchange of financial instruments.",
        "label": "Transaction [Domain]",
        "verboseLabel": "Transaction [Domain]"
       }
      }
     },
     "localname": "TransactionDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransactionTypeAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by type of agreement between buyer and seller for the exchange of financial instruments.",
        "label": "Transaction Type [Axis]",
        "verboseLabel": "Transaction Type [Axis]"
       }
      }
     },
     "localname": "TransactionTypeAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesEstimatedFairValueofDerivativeAssetsandLiabilitiesafterMasterNettingAgreementsandCashCollateralDetails",
      "http://www.metlife.com/role/DerivativesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount": {
     "auth_ref": [
      "r600"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.",
        "label": "Transfers Accounted for as Secured Borrowings, Associated Liabilities, Carrying Amount",
        "verboseLabel": "Cash collateral on deposit from counterparties"
       }
      }
     },
     "localname": "TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": {
     "auth_ref": [
      "r219",
      "r220",
      "r583",
      "r584",
      "r585",
      "r586",
      "r587",
      "r588",
      "r589",
      "r590",
      "r591",
      "r592",
      "r593",
      "r594",
      "r595",
      "r597",
      "r603",
      "r605",
      "r606",
      "r607",
      "r608",
      "r609",
      "r610",
      "r611",
      "r612",
      "r613",
      "r614",
      "r615",
      "r616",
      "r617",
      "r618",
      "r619"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.",
        "label": "Financial Instruments [Domain]",
        "terseLabel": "Financial Instruments [Domain]"
       }
      }
     },
     "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/ContingenciesCommitmentsandGuaranteesCommitmentsandGuaranteesNarrativeDetails",
      "http://www.metlife.com/role/FairValueFairValueOptionforResidentialMortgageLoansDetails",
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsAllowanceforCreditLossforFixedMaturitySecuritiesAFSbySectorDetailsDetails",
      "http://www.metlife.com/role/InvestmentsComponentsofNetInvestmentGainsLossesDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsEvaluationofAvailableForSaleSecuritiesforOTTIandEvaluatingTemporarilyImpairedAFSSecuritiesNarrativeDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsMortgageLoansbyPortfolioSegmentDetails",
      "http://www.metlife.com/role/InvestmentsSalesorDisposalsandImpairmentsofFixedMaturityAFSDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_TransfersOfFinancialAssetsAccountedForAsSaleInitialFairValueOfAssetsObtainedAsProceeds": {
     "auth_ref": [
      "r583",
      "r586",
      "r587",
      "r588"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Represents the initial fair value recorded for assets received on transfer of financial assets in a securitization, asset-backed financing arrangement, or a similar transfer which transaction is recognized as a sale of the transferred financial assets.",
        "label": "Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds",
        "terseLabel": "Transfers of Financial Assets Accounted for as Sale, Initial Fair Value of Assets Obtained as Proceeds"
       }
      }
     },
     "localname": "TransfersOfFinancialAssetsAccountedForAsSaleInitialFairValueOfAssetsObtainedAsProceeds",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_TypeOfAdoptionMember": {
     "auth_ref": [
      "r122",
      "r123",
      "r124",
      "r125",
      "r234",
      "r235",
      "r236",
      "r237",
      "r238",
      "r239",
      "r409",
      "r410",
      "r411",
      "r412",
      "r413",
      "r414",
      "r415",
      "r416",
      "r425",
      "r426",
      "r427",
      "r428",
      "r622",
      "r623",
      "r624",
      "r754",
      "r755",
      "r756",
      "r757",
      "r758",
      "r759",
      "r760",
      "r761",
      "r762",
      "r763",
      "r764",
      "r765"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amendment to accounting standards.",
        "label": "Accounting Standards Update [Domain]",
        "terseLabel": "Accounting Standards Update [Domain]"
       }
      }
     },
     "localname": "TypeOfAdoptionMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails",
      "http://www.metlife.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USStatesAndPoliticalSubdivisionsMember": {
     "auth_ref": [
      "r344",
      "r783"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.",
        "label": "US States and Political Subdivisions Debt Securities [Member]",
        "terseLabel": "Municipals"
       }
      }
     },
     "localname": "USStatesAndPoliticalSubdivisionsMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/FairValueUnobservableInputReconciliationDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_USTreasuryAndGovernmentMember": {
     "auth_ref": [
      "r344",
      "r668",
      "r783"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "This category includes investments in debt securities issued by the United States Department of the Treasury, US Government Agencies and US Government-sponsored Enterprises. Such securities may include treasury bills (short-term maturities - one year or less), treasury notes (intermediate term maturities - two to ten years), and treasury bonds (long-term maturities - ten to thirty years), debt securities issued by the Government National Mortgage Association (Ginnie Mae) and debt securities issued by the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac).",
        "label": "US Treasury and Government [Member]",
        "terseLabel": "U.S. government and agency",
        "verboseLabel": "U.S. government and agency"
       }
      }
     },
     "localname": "USTreasuryAndGovernmentMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueRecurringFairValueMeasurementsDetails",
      "http://www.metlife.com/role/InvestmentsContinuousGrossUnrealizedLossesforFixedMaturitySecuritiesAvailableForSaleDetailsDetails",
      "http://www.metlife.com/role/InvestmentsFixedMaturitySecuritiesAvailableForSalebySectorDetails",
      "http://www.metlife.com/role/InvestmentsSecuritiesLendingandRepurchaseAgreementsRemainingTenorDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums": {
     "auth_ref": [
      "r203"
     ],
     "crdr": "debit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.",
        "label": "Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums",
        "terseLabel": "Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums"
       }
      }
     },
     "localname": "UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsMortgageLoansNarrativeDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_UnderlyingAssetClassAxis": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by underlying asset class.",
        "label": "Underlying Asset Class [Axis]",
        "terseLabel": "Underlying Asset Class [Axis]"
       }
      }
     },
     "localname": "UnderlyingAssetClassAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_UnderlyingAssetClassDomain": {
     "auth_ref": [
      "r498"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Major types of referenced/underlying asset classes (for example, corporate debt, sovereign debt, and structured finance).",
        "label": "Underlying Asset Class [Domain]",
        "terseLabel": "Underlying Asset Class [Domain]"
       }
      }
     },
     "localname": "UnderlyingAssetClassDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesCreditRiskonFreestandingDerivativesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Tabular disclosure of unrealized gains and losses on investments.",
        "label": "Unrealized Gain (Loss) on Investments [Table Text Block]",
        "verboseLabel": "Components of net unrealized investment gains (losses) included in accumulated other comprehensive income (loss)"
       }
      }
     },
     "localname": "UnrealizedGainLossOnInvestmentsTableTextBlock",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_UseOfEstimates": {
     "auth_ref": [
      "r142",
      "r143",
      "r144",
      "r145",
      "r148",
      "r149",
      "r150"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.",
        "label": "Use of Estimates, Policy [Policy Text Block]",
        "verboseLabel": "Use of Estimates"
       }
      }
     },
     "localname": "UseOfEstimates",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/BusinessBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"
     ],
     "xbrltype": "textBlockItemType"
    },
    "us-gaap_ValuationTechniqueAxis": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Information by valuation approach and technique.",
        "label": "Valuation Approach and Technique [Axis]",
        "terseLabel": "Valuation Approach and Technique [Axis]"
       }
      }
     },
     "localname": "ValuationTechniqueAxis",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_ValuationTechniqueDomain": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valuation approach and technique.",
        "label": "Valuation Approach and Technique [Domain]",
        "terseLabel": "Valuation Approach and Technique [Domain]"
       }
      }
     },
     "localname": "ValuationTechniqueDomain",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_ValuationTechniqueMatrixPricingMember": {
     "auth_ref": [
      "r520"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Valuation technique interpolating value from similar instruments arranged in matrix.",
        "label": "Valuation Technique, Matrix Pricing [Member]",
        "terseLabel": "Valuation Technique, Matrix Pricing"
       }
      }
     },
     "localname": "ValuationTechniqueMatrixPricingMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/FairValueQuantitativeInformationDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableAnnuityMember": {
     "auth_ref": [
      "r753",
      "r787",
      "r789"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Contract providing periodic payment that varies according to investment experience of separate account in which amount paid to provide for annuity is allocated.",
        "label": "Variable Annuity [Member]",
        "verboseLabel": "Variable Annuity Guarantees:"
       }
      }
     },
     "localname": "VariableAnnuityMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InsuranceGuaranteesRelatedtoAnnuityContractsDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount": {
     "auth_ref": [
      "r452",
      "r455"
     ],
     "crdr": "credit",
     "lang": {
      "en-US": {
       "role": {
        "documentation": "The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).",
        "label": "Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount",
        "terseLabel": "Maximum Exposure to\u00a0Loss\u00a0(1)"
       }
      }
     },
     "localname": "VariableInterestEntityEntityMaximumLossExposureAmount",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "monetaryItemType"
    },
    "us-gaap_VariableInterestEntityLineItems": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.",
        "label": "Variable Interest Entity [Line Items]",
        "terseLabel": "Variable Interest Entity [Line Items]"
       }
      }
     },
     "localname": "VariableInterestEntityLineItems",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesNarrativeDetails"
     ],
     "xbrltype": "stringItemType"
    },
    "us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember": {
     "auth_ref": [],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Variable Interest Entities (VIE) in which the entity does not have a controlling financial interest (as defined) and of which it is therefore not the primary beneficiary. VIEs of which the entity is not the primary beneficiary because it does not have the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and for which it does not have the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE are not included in the consolidated financial statements of the entity.",
        "label": "Variable Interest Entity, Not Primary Beneficiary [Member]",
        "terseLabel": "Variable Interest Entity, Not Primary Beneficiary"
       }
      }
     },
     "localname": "VariableInterestEntityNotPrimaryBeneficiaryMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/InvestmentsTables",
      "http://www.metlife.com/role/InvestmentsUnconsolidatedVariableInterestEntitiesDetails"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VariableInterestEntityPrimaryBeneficiaryMember": {
     "auth_ref": [
      "r441",
      "r442",
      "r449",
      "r450",
      "r451"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "Variable Interest Entities (VIE) in which the entity has a controlling financial interest (as defined) and of which it is therefore the primary beneficiary. A controlling financial interest is determined based on both: (a) the entity's power to direct activities of the VIE that most significantly impact the VIE's economic performance and (b) the entity's obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the VIE that could potentially be significant to the VIE. VIEs of which the entity is the primary beneficiary are included in the consolidated financial statements of the entity.",
        "label": "Variable Interest Entity, Primary Beneficiary [Member]",
        "terseLabel": "Variable Interest Entity, Primary Beneficiary"
       }
      }
     },
     "localname": "VariableInterestEntityPrimaryBeneficiaryMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical",
      "http://www.metlife.com/role/InvestmentsConsolidatedVariableInterestEntitiesDetails",
      "http://www.metlife.com/role/InvestmentsTables"
     ],
     "xbrltype": "domainItemType"
    },
    "us-gaap_VarianceSwapMember": {
     "auth_ref": [
      "r462"
     ],
     "lang": {
      "en-US": {
       "role": {
        "documentation": "A type of volatility swap where the payout is linear to variance rather than volatility. Therefore, the payout will rise at a higher rate than volatility.",
        "label": "Variance Swap [Member]",
        "terseLabel": "Equity variance swaps"
       }
      }
     },
     "localname": "VarianceSwapMember",
     "nsuri": "http://fasb.org/us-gaap/2020-01-31",
     "presentation": [
      "http://www.metlife.com/role/DerivativesPrimaryRisksDetails"
     ],
     "xbrltype": "domainItemType"
    }
   },
   "unitCount": 7
  }
 },
 "std_ref": {
  "r0": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760"
  },
  "r1": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "205",
   "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760"
  },
  "r10": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(29))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r100": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r101": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  },
  "r102": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585"
  },
  "r103": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3098-108585"
  },
  "r104": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586"
  },
  "r105": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586"
  },
  "r106": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790"
  },
  "r107": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(e)(1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r108": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(g)(1)(ii))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r109": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(h))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r11": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r110": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08(k))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r111": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(k)(1))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r112": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(m)(1)(a)(i))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r113": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(m)(1)(i)(A))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r114": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(m))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r115": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.4-08.(n))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690"
  },
  "r116": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.12-04(a))",
   "Topic": "235",
   "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690"
  },
  "r117": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "235",
   "URI": "http://asc.fasb.org/topic&trid=2122369"
  },
  "r118": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "23",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21914-107793"
  },
  "r119": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21930-107793"
  },
  "r12": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r120": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21711-107793"
  },
  "r121": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21728-107793"
  },
  "r122": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r123": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r124": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(4)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r125": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r126": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794"
  },
  "r127": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r128": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794"
  },
  "r129": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794"
  },
  "r13": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r130": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794"
  },
  "r131": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794"
  },
  "r132": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794"
  },
  "r133": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "250",
   "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794"
  },
  "r134": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "250",
   "URI": "http://asc.fasb.org/topic&trid=2122394"
  },
  "r135": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256"
  },
  "r136": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1377-109256"
  },
  "r137": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "60B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256"
  },
  "r138": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257"
  },
  "r139": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "260",
   "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e3842-109258"
  },
  "r14": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30)(a)(4))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r140": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "270",
   "URI": "http://asc.fasb.org/extlink&oid=121640914&loc=SL77927221-108306"
  },
  "r141": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "272",
   "URI": "http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054"
  },
  "r142": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r143": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592"
  },
  "r144": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6161-108592"
  },
  "r145": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6191-108592"
  },
  "r146": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592"
  },
  "r147": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592"
  },
  "r148": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6061-108592"
  },
  "r149": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6132-108592"
  },
  "r15": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(30))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r150": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "275",
   "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6143-108592"
  },
  "r151": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "275",
   "URI": "http://asc.fasb.org/topic&trid=2134479"
  },
  "r152": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599"
  },
  "r153": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599"
  },
  "r154": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r155": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599"
  },
  "r156": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r157": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r158": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r159": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r16": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(31))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r160": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r161": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r162": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r163": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r164": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(j)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r165": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "22",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599"
  },
  "r166": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r167": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r168": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599"
  },
  "r169": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "26",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599"
  },
  "r17": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(32))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r170": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r171": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r172": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r173": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r174": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599"
  },
  "r175": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599"
  },
  "r176": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r177": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r178": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r179": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r18": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(4))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r180": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r181": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599"
  },
  "r182": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "34",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599"
  },
  "r183": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "40",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599"
  },
  "r184": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r185": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "41",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599"
  },
  "r186": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "42",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "280",
   "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599"
  },
  "r187": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "280",
   "URI": "http://asc.fasb.org/topic&trid=2134510"
  },
  "r188": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522"
  },
  "r189": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121593590&loc=d3e4437-111522"
  },
  "r19": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.1)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r190": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5162-111524"
  },
  "r191": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r192": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r193": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r194": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524"
  },
  "r195": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953659-111524"
  },
  "r196": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL49126937-111524"
  },
  "r197": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5086-111524"
  },
  "r198": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524"
  },
  "r199": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524"
  },
  "r2": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765"
  },
  "r20": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.12)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r200": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524"
  },
  "r201": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524"
  },
  "r202": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 4.E)",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707"
  },
  "r203": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "310",
   "URI": "http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533"
  },
  "r204": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562"
  },
  "r205": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562"
  },
  "r206": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27405-111563"
  },
  "r207": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL6283291-111563"
  },
  "r208": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r209": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r21": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19,20)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r210": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(aaa)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r211": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r212": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r213": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563"
  },
  "r214": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r215": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r216": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r217": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r218": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563"
  },
  "r219": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563"
  },
  "r22": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.19-26)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r220": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563"
  },
  "r221": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r222": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(3)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r223": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563"
  },
  "r224": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563"
  },
  "r225": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27340-111563"
  },
  "r226": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)-(d)",
   "Topic": "320",
   "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563"
  },
  "r227": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "320",
   "URI": "http://asc.fasb.org/topic&trid=2196928"
  },
  "r228": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570"
  },
  "r229": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=109237563&loc=d3e33775-111570"
  },
  "r23": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.20)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r230": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r231": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "323",
   "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571"
  },
  "r232": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "30",
   "Topic": "325",
   "URI": "http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605"
  },
  "r233": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL82887624-210437"
  },
  "r234": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r235": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r236": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r237": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r238": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r239": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)(4)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437"
  },
  "r24": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22(a)(1))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r240": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446"
  },
  "r241": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447"
  },
  "r242": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447"
  },
  "r243": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447"
  },
  "r244": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r245": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r246": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447"
  },
  "r247": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447"
  },
  "r248": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447"
  },
  "r249": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447"
  },
  "r25": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.22)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r250": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447"
  },
  "r251": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447"
  },
  "r252": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919265-210447"
  },
  "r253": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919265-210447"
  },
  "r254": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919265-210447"
  },
  "r255": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919265-210447"
  },
  "r256": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447"
  },
  "r257": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447"
  },
  "r258": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447"
  },
  "r259": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82921830-210448"
  },
  "r26": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.25)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r260": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82921835-210448"
  },
  "r261": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82921842-210448"
  },
  "r262": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "79",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448"
  },
  "r263": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "80",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448"
  },
  "r264": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454"
  },
  "r265": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121558606&loc=SL82922868-210454"
  },
  "r266": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)(1)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r267": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(3)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r268": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455"
  },
  "r269": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455"
  },
  "r27": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.29-31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r270": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922895-210455"
  },
  "r271": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922897-210455"
  },
  "r272": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r273": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r274": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r275": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(e)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r276": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(i)",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r277": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455"
  },
  "r278": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "326",
   "URI": "http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456"
  },
  "r279": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "350",
   "URI": "http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267"
  },
  "r28": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.3,4)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r280": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229"
  },
  "r281": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r282": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "360",
   "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230"
  },
  "r283": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869"
  },
  "r284": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 5.P.4(d))",
   "Topic": "420",
   "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747"
  },
  "r285": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "440",
   "URI": "http://asc.fasb.org/topic&trid=2144648"
  },
  "r286": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "05",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=99385795&loc=d3e12631-108344"
  },
  "r287": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349"
  },
  "r288": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349"
  },
  "r289": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14394-108349"
  },
  "r29": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.31)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r290": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r291": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349"
  },
  "r292": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14453-108349"
  },
  "r293": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14472-108349"
  },
  "r294": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349"
  },
  "r295": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(SAB Topic 5.Y)",
   "Topic": "450",
   "URI": "http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751"
  },
  "r296": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "450",
   "URI": "http://asc.fasb.org/topic&trid=2127136"
  },
  "r297": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12021-110248"
  },
  "r298": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12053-110248"
  },
  "r299": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248"
  },
  "r3": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(12))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r30": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.8)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r300": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248"
  },
  "r301": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248"
  },
  "r302": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "460",
   "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248"
  },
  "r303": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "460",
   "URI": "http://asc.fasb.org/topic&trid=2155896"
  },
  "r304": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "470",
   "URI": "http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870"
  },
  "r305": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644"
  },
  "r306": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.3-04)",
   "Topic": "505",
   "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770"
  },
  "r307": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "505",
   "URI": "http://asc.fasb.org/topic&trid=2208762"
  },
  "r308": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045"
  },
  "r309": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045"
  },
  "r31": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02.8,17)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r310": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r311": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r312": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r313": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r314": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r315": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r316": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "91",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "606",
   "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046"
  },
  "r317": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "610",
   "URI": "http://asc.fasb.org/topic&trid=49130413"
  },
  "r318": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r319": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "712",
   "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664"
  },
  "r32": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(3))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13728-122682"
  },
  "r320": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919"
  },
  "r321": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919"
  },
  "r322": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r323": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r324": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(10)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r325": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r326": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r327": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r328": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r329": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r33": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=49176635&loc=d3e9760-107771"
  },
  "r330": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r331": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r332": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(9)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r333": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r334": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r335": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r336": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r337": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r338": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r339": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r34": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r340": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r341": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(8)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r342": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r343": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r344": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(ii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r345": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iii)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r346": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(01)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r347": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r348": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(A)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r349": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(B)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r35": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r350": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(02)(C)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r351": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(iv)(03)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r352": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r353": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(f)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r354": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r355": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r356": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r357": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r358": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r359": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r36": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r360": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r361": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r362": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(h)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r363": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(i)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r364": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(j)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r365": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r366": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r367": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(k)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r368": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(l)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r369": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(n)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r37": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(1)(i)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r370": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(o)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r371": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(p)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r372": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(q)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r373": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r374": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(r)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r375": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920"
  },
  "r376": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920"
  },
  "r377": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920"
  },
  "r378": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920"
  },
  "r379": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r38": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(d)(2)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r380": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(1)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r381": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(2)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r382": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(3)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r383": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(4)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r384": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(5)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r385": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(6)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r386": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(a)(7)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r387": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920"
  },
  "r388": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920"
  },
  "r389": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921"
  },
  "r39": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(e)",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r390": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921"
  },
  "r391": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802"
  },
  "r392": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6412939&loc=d3e15145-114933"
  },
  "r393": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963"
  },
  "r394": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964"
  },
  "r395": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "70",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942"
  },
  "r396": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "35",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946"
  },
  "r397": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r398": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r399": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r4": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(17))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r40": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312"
  },
  "r400": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947"
  },
  "r401": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=d3e29149-114947"
  },
  "r402": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947"
  },
  "r403": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r404": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r405": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947"
  },
  "r406": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(b)",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947"
  },
  "r407": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "715",
   "URI": "http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948"
  },
  "r408": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "715",
   "URI": "http://asc.fasb.org/topic&trid=2235017"
  },
  "r409": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r41": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312"
  },
  "r410": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r411": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r412": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r413": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r414": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(1)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r415": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(f)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r416": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(g)(2)",
   "Topic": "718",
   "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333"
  },
  "r417": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "720",
   "URI": "http://asc.fasb.org/topic&trid=2122503"
  },
  "r418": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e31917-109318"
  },
  "r419": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e31931-109318"
  },
  "r42": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313"
  },
  "r420": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319"
  },
  "r421": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319"
  },
  "r422": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32705-109319"
  },
  "r423": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319"
  },
  "r424": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32857-109319"
  },
  "r425": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "740"
  },
  "r426": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "740"
  },
  "r427": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(2)",
   "Topic": "740"
  },
  "r428": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "10",
   "Subparagraph": "(d)(3)",
   "Topic": "740"
  },
  "r429": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.5.Q1)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r43": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313"
  },
  "r430": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB TOPIC 6.I.7)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817"
  },
  "r431": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.C)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817"
  },
  "r432": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324"
  },
  "r433": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "270",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338"
  },
  "r434": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "740",
   "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331"
  },
  "r435": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "740",
   "URI": "http://asc.fasb.org/topic&trid=2144680"
  },
  "r436": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568447-111683"
  },
  "r437": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "16",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4568740-111683"
  },
  "r438": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "19",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683"
  },
  "r439": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683"
  },
  "r44": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313"
  },
  "r440": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4613674-111683"
  },
  "r441": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r442": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988"
  },
  "r443": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=d3e5614-111684"
  },
  "r444": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r445": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r446": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r447": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r448": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c),(3)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684"
  },
  "r449": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r45": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a),(b),(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r450": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r451": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685"
  },
  "r452": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "b",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5728-111685"
  },
  "r453": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5728-111685"
  },
  "r454": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=SL6759159-111685"
  },
  "r455": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5747-111685"
  },
  "r456": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5747-111685"
  },
  "r457": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "9",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=SL6228884-111685"
  },
  "r458": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4I",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4590271-111686"
  },
  "r459": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686"
  },
  "r46": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r460": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "810",
   "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686"
  },
  "r461": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "810",
   "URI": "http://asc.fasb.org/topic&trid=2197479"
  },
  "r462": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "83",
   "Publisher": "FASB",
   "Section": "15",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121636179&loc=d3e34841-113949"
  },
  "r463": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958"
  },
  "r464": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959"
  },
  "r465": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r466": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959"
  },
  "r467": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959"
  },
  "r468": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)(i)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959"
  },
  "r469": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)(ii)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959"
  },
  "r47": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r470": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959"
  },
  "r471": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41638-113959"
  },
  "r472": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r473": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r474": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r475": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959"
  },
  "r476": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a),(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r477": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r478": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r479": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r48": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r480": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959"
  },
  "r481": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959"
  },
  "r482": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4C",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959"
  },
  "r483": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r484": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r485": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r486": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(3)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r487": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(5)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r488": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r489": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959"
  },
  "r49": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(i),(j),(k)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r490": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4E",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624181-113959"
  },
  "r491": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4EE",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL109999712-113959"
  },
  "r492": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4EE",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL109999712-113959"
  },
  "r493": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624186-113959"
  },
  "r494": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4F",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(2)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624186-113959"
  },
  "r495": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959"
  },
  "r496": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959"
  },
  "r497": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4J",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708773-113959"
  },
  "r498": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959"
  },
  "r499": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)(4)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959"
  },
  "r5": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19)(a))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r50": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580"
  },
  "r500": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)(1)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959"
  },
  "r501": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959"
  },
  "r502": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4K",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959"
  },
  "r503": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4L",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708777-113959"
  },
  "r504": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41641-113959"
  },
  "r505": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41675-113959"
  },
  "r506": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r507": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r508": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959"
  },
  "r509": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "182",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121582272&loc=SL5629052-113961"
  },
  "r51": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580"
  },
  "r510": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "15",
   "Topic": "815",
   "URI": "http://asc.fasb.org/subtopic&trid=2229187"
  },
  "r511": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121483254&loc=SL109983883-199619"
  },
  "r512": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "25",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986"
  },
  "r513": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994"
  },
  "r514": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994"
  },
  "r515": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(e)",
   "Topic": "815",
   "URI": "http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994"
  },
  "r516": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "815",
   "URI": "http://asc.fasb.org/topic&trid=2229140"
  },
  "r517": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r518": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r519": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r52": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580"
  },
  "r520": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r521": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r522": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(bbb)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r523": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r524": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r525": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(1a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r526": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(2)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r527": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)(3)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r528": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r529": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(h)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r53": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580"
  },
  "r530": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258"
  },
  "r531": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258"
  },
  "r532": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258"
  },
  "r533": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r534": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "820",
   "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258"
  },
  "r535": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=d3e13220-108610"
  },
  "r536": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "10",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611"
  },
  "r537": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611"
  },
  "r538": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13476-108611"
  },
  "r539": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611"
  },
  "r54": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580"
  },
  "r540": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "21",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13537-108611"
  },
  "r541": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)(1)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r542": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(1)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r543": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(2)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r544": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(e)(3)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r545": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(f)",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r546": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612"
  },
  "r547": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "30",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612"
  },
  "r548": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "31",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14210-108612"
  },
  "r549": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "32",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "825",
   "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14217-108612"
  },
  "r55": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724391-108580"
  },
  "r550": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894"
  },
  "r551": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895"
  },
  "r552": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "230",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906"
  },
  "r553": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900"
  },
  "r554": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r555": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r556": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r557": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Subparagraph": "(d)",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r558": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900"
  },
  "r559": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "830",
   "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901"
  },
  "r56": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724394-108580"
  },
  "r560": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391"
  },
  "r561": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399"
  },
  "r562": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "30",
   "Topic": "835",
   "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400"
  },
  "r563": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121555071&loc=d3e37045-112695"
  },
  "r564": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "30",
   "SubTopic": "30",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121556109&loc=d3e42840-112730"
  },
  "r565": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121568338&loc=d3e45377-112738"
  },
  "r566": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "840",
   "URI": "http://asc.fasb.org/extlink&oid=121568338&loc=d3e45424-112738"
  },
  "r567": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "40",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121604053&loc=SL77918607-209975"
  },
  "r568": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(g)(2)",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980"
  },
  "r569": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "53",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971"
  },
  "r57": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r570": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121561866&loc=SL77919306-209978"
  },
  "r571": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121561866&loc=SL77919311-209978"
  },
  "r572": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121576215&loc=SL77919372-209981"
  },
  "r573": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121576215&loc=SL77919379-209981"
  },
  "r574": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Topic": "842",
   "URI": "http://asc.fasb.org/extlink&oid=121579104&loc=SL77920254-209983"
  },
  "r575": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r576": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r577": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r578": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r579": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864"
  },
  "r58": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r580": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864"
  },
  "r581": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Topic": "850",
   "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864"
  },
  "r582": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "850",
   "URI": "http://asc.fasb.org/topic&trid=2122745"
  },
  "r583": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(i)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r584": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)(ii)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r585": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r586": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r587": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r588": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(bb)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r589": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r59": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(c)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580"
  },
  "r590": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r591": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719"
  },
  "r592": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r593": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r594": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(b)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r595": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719"
  },
  "r596": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4D",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719"
  },
  "r597": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728"
  },
  "r598": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r599": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r6": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(19))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r60": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580"
  },
  "r600": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(b)(1)(ii)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r601": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r602": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729"
  },
  "r603": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729"
  },
  "r604": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122596-111746"
  },
  "r605": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r606": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r607": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r608": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)(i)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746"
  },
  "r609": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r61": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1B",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580"
  },
  "r610": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r611": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r612": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(4)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r613": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(5)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r614": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(6)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r615": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(a)(7)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r616": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(b)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r617": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(1)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r618": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(2)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r619": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(e)(3)",
   "Topic": "860",
   "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746"
  },
  "r62": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e557-108580"
  },
  "r620": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "910",
   "URI": "http://asc.fasb.org/extlink&oid=119991564&loc=SL119991595-234733"
  },
  "r621": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SAB Topic 11.L)",
   "Topic": "924",
   "URI": "http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856"
  },
  "r622": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(a)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r623": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(b)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r624": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "926",
   "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079"
  },
  "r625": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447"
  },
  "r626": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61929-109447"
  },
  "r627": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447"
  },
  "r628": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "20",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62059-109447"
  },
  "r629": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447"
  },
  "r63": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "10",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581"
  },
  "r630": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62395-109447"
  },
  "r631": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447"
  },
  "r632": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "33",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e62479-109447"
  },
  "r633": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(a)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447"
  },
  "r634": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "35A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(b)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=SL6807758-109447"
  },
  "r635": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(1)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447"
  },
  "r636": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "8",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "235",
   "Subparagraph": "(c)(2)",
   "Topic": "932",
   "URI": "http://asc.fasb.org/extlink&oid=68064819&loc=d3e61872-109447"
  },
  "r637": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "20",
   "Topic": "940",
   "URI": "http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953"
  },
  "r638": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "940",
   "URI": "http://asc.fasb.org/subtopic&trid=2176304"
  },
  "r639": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(10))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r64": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(1))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r640": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(11))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r641": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r642": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(16))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r643": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(22))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r644": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r645": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(4))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r646": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(5))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r647": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(6))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r648": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(7)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r649": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03(7))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r65": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(10))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r650": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.13(1))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r651": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.15)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r652": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.17)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r653": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.7(a)(7))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r654": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.9-03.7)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878"
  },
  "r655": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(c))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r656": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13)(f))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r657": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(13))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r658": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(14)(d))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r659": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(15))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r66": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(12))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r660": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(23))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r661": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(24))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r662": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(25))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r663": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04(26))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r664": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.11)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r665": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.13(c),(d))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r666": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.9-04.13(h))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260"
  },
  "r667": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.9-05(b)(2))",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884"
  },
  "r668": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62557-112803"
  },
  "r669": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62557-112803"
  },
  "r67": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(21))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r670": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62586-112803"
  },
  "r671": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(a)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803"
  },
  "r672": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(b)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803"
  },
  "r673": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(c)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803"
  },
  "r674": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "320",
   "Subparagraph": "(d)",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803"
  },
  "r675": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "942",
   "URI": "http://asc.fasb.org/subtopic&trid=2209399"
  },
  "r676": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "325",
   "Topic": "942",
   "URI": "http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809"
  },
  "r677": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "20",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6480726&loc=d3e6691-158385"
  },
  "r678": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387"
  },
  "r679": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387"
  },
  "r68": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(22))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r680": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "20",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639652&loc=d3e7104-158389"
  },
  "r681": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "20",
   "Subparagraph": "(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=27015749&loc=d3e569990-122904"
  },
  "r682": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(13)(a)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r683": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(13)(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r684": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r685": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r686": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(1)(g))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r687": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r688": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(11))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r689": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(12))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r69": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(23))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r690": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16)(a)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r691": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(16))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r692": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(18))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r693": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(3))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r694": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r695": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(24))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r696": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(25))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r697": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(4))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r698": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(5))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r699": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03(a)(6))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r7": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(2))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r70": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(24))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r700": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.(a),19)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r701": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(c))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r702": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(d))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r703": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(e))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r704": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(f,g))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r705": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.1(h))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r706": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.14(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r707": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.5)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r708": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "210",
   "Subparagraph": "(SX 210.7-03.7)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910"
  },
  "r709": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r71": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(2))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r710": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(10))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r711": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(19))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r712": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(2))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r713": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(20))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r714": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(21))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r715": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(22))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r716": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(3)(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r717": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(3)(b))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r718": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(6))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r719": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(8))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r72": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(7)(c))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r720": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04(9))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r721": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r722": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.3(a))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r723": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.4)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r724": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.5)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r725": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "220",
   "Subparagraph": "(SX 210.7-04.5,6,7)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263"
  },
  "r726": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column C))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r727": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column D))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r728": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "235",
   "Subparagraph": "(SX 210.12-17(Column E))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=120401096&loc=d3e574992-122915"
  },
  "r729": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415"
  },
  "r73": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03(b)(9)(a))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r730": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415"
  },
  "r731": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "30",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638524&loc=SL117422543-158416"
  },
  "r732": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121581245&loc=d3e21338-158488"
  },
  "r733": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489"
  },
  "r734": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "360",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117337397&loc=d3e23415-158514"
  },
  "r735": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "360",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117337397&loc=d3e23439-158514"
  },
  "r736": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "360",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=117337411&loc=d3e23528-158515"
  },
  "r737": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "25",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639894&loc=d3e13193-158430"
  },
  "r738": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r739": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r74": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.2)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r740": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r741": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(cc)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r742": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437"
  },
  "r743": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4H",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438"
  },
  "r744": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r745": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "6",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=d3e14931-158439"
  },
  "r746": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439"
  },
  "r747": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7A",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439"
  },
  "r748": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7B",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782768-158439"
  },
  "r749": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13H",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441"
  },
  "r75": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.3)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r750": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13J",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Subparagraph": "(g)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783734-158441"
  },
  "r751": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29E",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819541-158441"
  },
  "r752": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29F",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819544-158441"
  },
  "r753": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "29G",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "40",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819547-158441"
  },
  "r754": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r755": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r756": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r757": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r758": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(f)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r759": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r76": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.4)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r760": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(i)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r761": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(ii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r762": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iii)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r763": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(g)(2)(iv)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r764": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r765": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "65",
   "SubTopic": "40",
   "Subparagraph": "(h)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641"
  },
  "r766": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "50",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6483535&loc=d3e16392-158451"
  },
  "r767": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "60",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121639140&loc=SL117422156-227712"
  },
  "r768": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=84167274&loc=d3e27175-158546"
  },
  "r769": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(a)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r77": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(a),(b))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r770": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(b)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r771": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(b)(3)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r772": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(c)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r773": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Subparagraph": "(c)(3)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r774": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "605",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547"
  },
  "r775": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=6484091&loc=d3e19268-158472"
  },
  "r776": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "((d)(1))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r777": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "((d)(5))",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r778": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r779": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r78": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.7(c),9(a))",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r780": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(1)(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r781": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r782": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(d)(3),(5)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r783": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(e)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r784": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473"
  },
  "r785": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=SL117422267-158473"
  },
  "r786": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Subparagraph": "(c)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=SL117422267-158473"
  },
  "r787": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=SL117422267-158473"
  },
  "r788": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638699&loc=SL117422397-158474"
  },
  "r789": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "18",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "80",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638699&loc=SL117422401-158474"
  },
  "r79": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.8)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r790": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30785-158569"
  },
  "r791": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(a)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r792": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r793": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(1)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r794": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(10)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r795": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(2)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r796": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(3)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r797": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(4)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r798": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(5)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r799": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(6)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r8": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(20))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r80": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-03.9)",
   "Topic": "220",
   "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227"
  },
  "r800": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(7)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r801": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(8)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r802": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Subparagraph": "(b)(9)",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r803": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30806-158569"
  },
  "r804": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "50",
   "SubTopic": "805",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121638837&loc=d3e30862-158569"
  },
  "r805": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "4",
   "Publisher": "FASB",
   "Section": "55",
   "SubTopic": "805",
   "Topic": "944",
   "URI": "http://asc.fasb.org/extlink&oid=121635976&loc=d3e31071-158570"
  },
  "r806": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "805",
   "Topic": "944",
   "URI": "http://asc.fasb.org/subtopic&trid=2560393"
  },
  "r807": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "Topic": "944",
   "URI": "http://asc.fasb.org/topic&trid=2303980"
  },
  "r808": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12(2)(i))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611133-123010"
  },
  "r809": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r81": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "11",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585"
  },
  "r810": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r811": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r812": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r813": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r814": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r815": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r816": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r817": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "3",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010"
  },
  "r818": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010"
  },
  "r819": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "5D",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010"
  },
  "r82": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r820": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column A))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r821": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column B))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r822": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column C))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r823": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "7",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "320",
   "Subparagraph": "(SX 210.12-15(Column D))",
   "Topic": "946",
   "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010"
  },
  "r824": {
   "Name": "Accounting Standards Codification",
   "Publisher": "FASB",
   "SubTopic": "320",
   "Topic": "946",
   "URI": "http://asc.fasb.org/subtopic&trid=2324412"
  },
  "r825": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "310",
   "Topic": "948",
   "URI": "http://asc.fasb.org/extlink&oid=120238483&loc=d3e48678-111004"
  },
  "r826": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "360",
   "Subparagraph": "(SX 210.12-28(Footnote 4))",
   "Topic": "970",
   "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024"
  },
  "r827": {
   "Name": "Form 10-Q",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "308",
   "Subsection": "a"
  },
  "r828": {
   "Name": "Forms 10-K, 10-Q, 20-F",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "13",
   "Subsection": "a-1"
  },
  "r829": {
   "Name": "Regulation 12B",
   "Number": "240",
   "Publisher": "SEC",
   "Section": "12",
   "Subsection": "b-2"
  },
  "r83": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r830": {
   "Name": "Regulation S-T",
   "Number": "232",
   "Publisher": "SEC",
   "Section": "405"
  },
  "r84": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "12",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585"
  },
  "r85": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r86": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r87": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "13",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585"
  },
  "r88": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r89": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "14",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585"
  },
  "r9": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "1",
   "Publisher": "FASB",
   "Section": "S99",
   "SubTopic": "10",
   "Subparagraph": "(SX 210.5-02(22))",
   "Topic": "210",
   "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682"
  },
  "r90": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r91": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(b)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r92": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "15",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585"
  },
  "r93": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "17",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(d)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585"
  },
  "r94": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "2",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3000-108585"
  },
  "r95": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "24",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585"
  },
  "r96": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(e)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r97": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(g)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r98": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "25",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585"
  },
  "r99": {
   "Name": "Accounting Standards Codification",
   "Paragraph": "28",
   "Publisher": "FASB",
   "Section": "45",
   "SubTopic": "10",
   "Subparagraph": "(a)",
   "Topic": "230",
   "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585"
  }
 },
 "version": "2.1"
}
