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2us-gaap_OtherCostAndExpenseDisclosureOperatingAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Other Expenses2false 3us-gaap_LaborAndRelatedExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse8200000082USD$falsetruefalse2truefalsefalse8300000083USD$falsetruefalse3truefalsefalse171000000171USD$falsetruefalse4truefalsefalse176000000176USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Compensation3false 3us-gaap_NoninterestExpenseCommissionExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse170000000170falsefalsefalse2truefalsefalse246000000246falsefalsefalse3truefalsefalse363000000363falsefalsefalse4truefalsefalse526000000526falsefalsefalsexbrli:monetaryItemTypemonetaryFees paid by the Entity to sales representatives based on commission payout contracts covering the sale of mutual funds and insurance products.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 false2Commissions4false 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3us-gaap_InterestExpenseRelatedPartyus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4000000040falsefalsefalse2truefalsefalse9800000098falsefalsefalse3truefalsefalse9800000098falsefalsefalse4truefalsefalse147000000147falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of interest expense incurred during the period on a debt or other obligation to a related party.No definition available.false2Affiliated interest costs on ceded reinsurance6false 3us-gaap_OtherExpenseCapitalizationToDeferredAcquisitionCostDACus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-133000000-133falsefalsefalse2truefalsefalse-217000000-217falsefalsefalse3truefalsefalse-287000000-287falsefalsefalse4truefalsefalse-494000000-494falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the total amount of operating expenses resulting from the amortization or adjustments of amounts capitalized as deferred policy acquisition costs.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.7(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 7 -Article 7 false2Capitalization of DAC7false 3us-gaap_DeferredPolicyAcquisitionCostsAndPresentValueOfFutureProfitsAmortization1us-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse40000004falsefalsefalse2truefalsefalse416000000416falsefalsefalse3truefalsefalse3000000030falsefalsefalse4truefalsefalse454000000454falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of deferred policy acquisition costs and capitalized present value of the future profits (PVFP) expensed. Acquisition costs are costs that are related directly to the successful acquisition of new or renewal insurance contracts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=6784649&loc=d3e569990-122904 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6967983&loc=d3e11264-158415 false2Amortization of DAC and VOBA8false 3us-gaap_InterestAndDebtExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4900000049falsefalsefalse2truefalsefalse5900000059falsefalsefalse3truefalsefalse100000000100falsefalsefalse4truefalsefalse119000000119falsefalsefalsexbrli:monetaryItemTypemonetaryInterest and debt related expenses associated with nonoperating financing activities of the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 false2Interest expense on debt and debt issuance costs9false 3micc_PremiumTaxesLicensesFeesmicc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1500000015falsefalsefalse2truefalsefalse1600000016falsefalsefalse3truefalsefalse2800000028falsefalsefalse4truefalsefalse4000000040falsefalsefalsexbrli:monetaryItemTypemonetaryOther expenses related to premium taxes, licenses & fees.No definition available.false2Premium taxes, licenses and fees10false 3us-gaap_ProfessionalFeesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse50000005falsefalsefalse2truefalsefalse60000006falsefalsefalse3truefalsefalse1000000010falsefalsefalse4truefalsefalse1200000012falsefalsefalsexbrli:monetaryItemTypemonetaryA fee charged for services from professionals such as doctors, lawyers and accountants. 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