{ "instance": { "stg-20f_20211231.htm": { "axisCustom": 0, "axisStandard": 33, "contextCount": 238, "dts": { "calculationLink": { "local": [ "stg-20211231_cal.xml" ] }, "definitionLink": { "local": [ "stg-20211231_def.xml" ] }, "inline": { "local": [ "stg-20f_20211231.htm" ] }, "labelLink": { "local": [ "stg-20211231_lab.xml" ] }, "presentationLink": { "local": [ "stg-20211231_pre.xml" ] }, "schema": { "local": [ "stg-20211231.xsd" ], "remote": [ "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/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.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/reference-2009-12-16.xsd", "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd", "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd", "https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd", "https://xbrl.fasb.org/srt/2021/elts/srt-roles-2021-01-31.xsd", "https://xbrl.fasb.org/srt/2021/elts/srt-types-2021-01-31.xsd", "https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd", "https://xbrl.fasb.org/us-gaap/2021/elts/us-roles-2021-01-31.xsd", "https://xbrl.fasb.org/us-gaap/2021/elts/us-types-2021-01-31.xsd", "https://xbrl.sec.gov/country/2021/country-2021.xsd", "https://xbrl.sec.gov/currency/2021/currency-2021.xsd", "https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd", "https://xbrl.sec.gov/exch/2021/exch-2021.xsd", "https://xbrl.sec.gov/naics/2021/naics-2021.xsd", "https://xbrl.sec.gov/sic/2021/sic-2021.xsd", "https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd" ] } }, "elementCount": 634, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2021-01-31": 10, "http://www.sunlands.com/20211231": 2, "http://xbrl.sec.gov/dei/2021q4": 15, "total": 27 }, "keyCustom": 87, "keyStandard": 313, "memberCustom": 36, "memberStandard": 37, "nsprefix": "stg", "nsuri": "http://www.sunlands.com/20211231", "report": { "R1": { "firstAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "100000 - Document - Document and Entity Information", "role": "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "shortName": "Document and Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100090 - Disclosure - Significant Accounting Policies", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPolicies", "shortName": "Significant Accounting Policies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R100": { "firstAnchor": { "ancestors": [ "p", "stg:ConvenienceTranslationPolicyTextBlock", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "4", "first": true, "lang": null, "name": "us-gaap:ForeignCurrencyExchangeRateTranslation1", "reportCount": 1, "unitRef": "U_iso4217USD_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "101000 - Disclosure - Financial Statement Schedule I - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleIAdditionalInformationDetails", "shortName": "Financial Statement Schedule I - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R11": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100100 - Disclosure - Short-Term Investments", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestments", "shortName": "Short-Term Investments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100110 - Disclosure - Prepaid Expenses and Other Current Assets", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssets", "shortName": "Prepaid Expenses and Other Current Assets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:DeferredCostsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100120 - Disclosure - Deferred Costs", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCosts", "shortName": "Deferred Costs", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:DeferredCostsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100130 - Disclosure - Property and Equipment, Net", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNet", "shortName": "Property and Equipment, Net", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IntangibleAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100140 - Disclosure - Intangible Assets, Net", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNet", "shortName": "Intangible Assets, Net", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IntangibleAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:LandUseRightTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100150 - Disclosure - Land Use Right, Net", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNet", "shortName": "Land Use Right, Net", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:LandUseRightTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EquityMethodInvestmentsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100160 - Disclosure - Long-Term Investments", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestments", "shortName": "Long-Term Investments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EquityMethodInvestmentsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:OtherNonCurrentAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100170 - Disclosure - Other Non-Current Assets", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssets", "shortName": "Other Non-Current Assets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:OtherNonCurrentAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100180 - Disclosure - Accrued Expenses and Other Current Liabilities", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities", "shortName": "Accrued Expenses and Other Current Liabilities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100010 - Statement - CONSOLIDATED BALANCE SHEETS", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "shortName": "CONSOLIDATED BALANCE SHEETS", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:RestrictedCashCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100190 - Disclosure - Revenues and Deferred Revenue", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenue", "shortName": "Revenues and Deferred Revenue", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RevenueFromContractWithCustomerTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LongTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100200 - Disclosure - Long-Term Debt", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebt", "shortName": "Long-Term Debt", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LongTermDebtTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:OrdinarySharesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100210 - Disclosure - Ordinary Shares", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinaryShares", "shortName": "Ordinary Shares", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:OrdinarySharesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100220 - Disclosure - Fair Value Measurement", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurement", "shortName": "Fair Value Measurement", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100230 - Disclosure - Disposal of Subsidiaries", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiaries", "shortName": "Disposal of Subsidiaries", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100240 - Disclosure - Share Incentive Plan", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlan", "shortName": "Share Incentive Plan", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100250 - Disclosure - Leases", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeases", "shortName": "Leases", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100260 - Disclosure - Income Taxes", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100270 - Disclosure - Net (Loss) / Income Per Share", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShare", "shortName": "Net (Loss) / Income Per Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100280 - Disclosure - Commitments and Contingencies", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentsAndContingencies", "shortName": "Commitments and Contingencies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AccruedLiabilitiesCurrent", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100020 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "shortName": "CONSOLIDATED BALANCE SHEETS (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_us-gaapVariableInterestEntityPrimaryBeneficiaryMember_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:DeferredIncomeTaxLiabilitiesNet", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100290 - Disclosure - Segment Reporting", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSegmentReporting", "shortName": "Segment Reporting", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100300 - Disclosure - Employee Defined Contribution Plan", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureEmployeeDefinedContributionPlan", "shortName": "Employee Defined Contribution Plan", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RestrictedAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100310 - Disclosure - Restricted Net Assets", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssets", "shortName": "Restricted Net Assets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RestrictedAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100320 - Disclosure - Condensed Financial Information Of Parent Company", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCondensedFinancialInformationOfParentCompany", "shortName": "Condensed Financial Information Of Parent Company", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "us-gaap:SignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:BasisOfPresentationAndUseOfEstimatesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100330 - Disclosure - Significant Accounting Policies (Policies)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies", "shortName": "Significant Accounting Policies (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "us-gaap:SignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:BasisOfPresentationAndUseOfEstimatesPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:SummaryOfSubsidiariesAndVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100340 - Disclosure - Organization and Basis of Presentation (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationTables", "shortName": "Organization and Basis of Presentation (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:SummaryOfSubsidiariesAndVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:ScheduleOfVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100350 - Disclosure - Significant Accounting Policies (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesTables", "shortName": "Significant Accounting Policies (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:ScheduleOfVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MarketableSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100360 - Disclosure - Short-Term Investments (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsTables", "shortName": "Short-Term Investments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:MarketableSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100370 - Disclosure - Prepaid Expenses and Other Current Assets (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables", "shortName": "Prepaid Expenses and Other Current Assets (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "stg:DeferredCostsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:DeferredCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100380 - Disclosure - Deferred Costs (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsTables", "shortName": "Deferred Costs (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "stg:DeferredCostsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:DeferredCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100030 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS", "shortName": "CONSOLIDATED STATEMENTS OF OPERATIONS", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:ResearchAndDevelopmentExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100390 - Disclosure - Property and Equipment, Net (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetTables", "shortName": "Property and Equipment, Net (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100400 - Disclosure - Intangible Assets, Net (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetTables", "shortName": "Intangible Assets, Net (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "stg:LandUseRightTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:SummaryOfLandUseRightTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100410 - Disclosure - Land Use Right, Net (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetTables", "shortName": "Land Use Right, Net (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "stg:LandUseRightTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:SummaryOfLandUseRightTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "stg:OtherNonCurrentAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherAssetsNoncurrentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100420 - Disclosure - Other Non-Current Assets (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsTables", "shortName": "Other Non-Current Assets (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "stg:OtherNonCurrentAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherAssetsNoncurrentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100430 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables", "shortName": "Accrued Expenses and Other Current Liabilities (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "p", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisaggregationOfRevenueTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100440 - Disclosure - Revenues and Deferred Revenue (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueTables", "shortName": "Revenues and Deferred Revenue (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisaggregationOfRevenueTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "us-gaap:FairValueDisclosuresTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100450 - Disclosure - Fair Value Measurement (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementTables", "shortName": "Fair Value Measurement (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:FairValueDisclosuresTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100460 - Disclosure - Share Incentive Plan (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanTables", "shortName": "Share Incentive Plan (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:LesseeScheduleOfOperatingLeaseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100470 - Disclosure - Leases (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesTables", "shortName": "Leases (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "stg:LesseeScheduleOfOperatingLeaseTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100480 - Disclosure - Income Taxes (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100040 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical", "shortName": "CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R50": { "firstAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100490 - Disclosure - Net (Loss) / Income Per Share (Tables)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareTables", "shortName": "Net (Loss) / Income Per Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:EntityIncorporationStateCountryCode", "reportCount": 1, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100500 - Disclosure - Organization and Basis of Presentation - Summary of Major Subsidiaries VIEs and VIEs' Subsidiaries (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails", "shortName": "Organization and Basis of Presentation - Summary of Major Subsidiaries VIEs and VIEs' Subsidiaries (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:SummaryOfSubsidiariesAndVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtOwnershipAxis_stgSunlandsOnlineEducationHKLimitedMember_20210101_20211231", "decimals": null, "lang": "en-US", "name": "dei:EntityIncorporationDateOfIncorporation", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "stg:SaleOrPurchaseOfAssetsOrRightsMinimumAmount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100510 - Disclosure - Significant Accounting Policies - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "shortName": "Significant Accounting Policies - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "stg:SaleOrPurchaseOfAssetsOrRightsMinimumAmount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100520 - Disclosure - Significant Accounting Policies - Summary Financial Information of VIEs and their Subsidiaries (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "shortName": "Significant Accounting Policies - Summary Financial Information of VIEs and their Subsidiaries (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:ScheduleOfVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:VariableInterestEntityActivityBetweenVIEAndEntityRevenues", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock", "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtRangeAxis_srtMinimumMember_us-gaapPropertyPlantAndEquipmentByTypeAxis_us-gaapBuildingMember_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100530 - Disclosure - Significant Accounting Policies - Summary of Estimated Useful Lives of Property and Equipment (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails", "shortName": "Significant Accounting Policies - Summary of Estimated Useful Lives of Property and Equipment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock", "us-gaap:PropertyPlantAndEquipmentPolicyTextBlock", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtRangeAxis_srtMinimumMember_us-gaapPropertyPlantAndEquipmentByTypeAxis_us-gaapBuildingMember_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentUsefulLife", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock", "us-gaap:IntangibleAssetsFiniteLivedPolicy", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapFiniteLivedIntangibleAssetsByMajorClassAxis_us-gaapComputerSoftwareIntangibleAssetMember_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FiniteLivedIntangibleAssetUsefulLife", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100540 - Disclosure - Significant Accounting Policies - Summary of Estimated Useful Lives of Intangible Assets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails", "shortName": "Significant Accounting Policies - Summary of Estimated Useful Lives of Intangible Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock", "us-gaap:IntangibleAssetsFiniteLivedPolicy", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapFiniteLivedIntangibleAssetsByMajorClassAxis_us-gaapComputerSoftwareIntangibleAssetMember_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FiniteLivedIntangibleAssetUsefulLife", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:MarketableSecuritiesTextBlock", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:HeldToMaturitySecuritiesCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100550 - Disclosure - Short-Term Investments - Schedule of Short-Term Investment (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails", "shortName": "Short-Term Investments - Schedule of Short-Term Investment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:MarketableSecuritiesTextBlock", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:HeldToMaturitySecuritiesCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "stg:ImpairmentLossOnShortTermInvestments", "stg:ImpairmentLossOnShortTermInvestments", "p", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:ImpairmentLossOnShortTermInvestments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100560 - Disclosure - Short-Term Investments - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsAdditionalInformationDetails", "shortName": "Short-Term Investments - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "stg:ImpairmentLossOnShortTermInvestments", "stg:ImpairmentLossOnShortTermInvestments", "p", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:ImpairmentLossOnShortTermInvestments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock", "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "stg:ReceivablesFromThirdPartyPaymentAgencies", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100570 - Disclosure - Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails", "shortName": "Prepaid Expenses and Other Current Assets - Summary of Prepaid Expenses and Other Current Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock", "stg:PrepaidExpensesAndOtherCurrentAssetsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "stg:ReceivablesFromThirdPartyPaymentAgencies", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R59": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:DeferredCostsTableTextBlock", "stg:DeferredCostsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredSalesInducementsNet", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100580 - Disclosure - Deferred Costs - Schedule of Movements of Deferred Costs (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails", "shortName": "Deferred Costs - Schedule of Movements of Deferred Costs (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:DeferredCostsTableTextBlock", "stg:DeferredCostsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredSalesInducementsNet", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R6": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100050 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) / INCOME", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME", "shortName": "CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) / INCOME", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R60": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PropertyPlantAndEquipmentGross", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100590 - Disclosure - Property and Equipment, Net - Summary of Property and Equipment Consisted (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "shortName": "Property and Equipment, Net - Summary of Property and Equipment Consisted (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R61": { "firstAnchor": { "ancestors": [ "p", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:NumberOfPropertiesAcquired", "reportCount": 1, "unique": true, "unitRef": "U_stgBuilding", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100600 - Disclosure - Property and Equipment, Net - Summary of Property and Equipment Consisted (Parenthetical) (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails", "shortName": "Property and Equipment, Net - Summary of Property and Equipment Consisted (Parenthetical) (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:NumberOfPropertiesAcquired", "reportCount": 1, "unique": true, "unitRef": "U_stgBuilding", "xsiNil": "false" } }, "R62": { "firstAnchor": { "ancestors": [ "p", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Depreciation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100610 - Disclosure - Property and Equipment, Net - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetails", "shortName": "Property and Equipment, Net - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Depreciation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R63": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock", "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100620 - Disclosure - Intangible Assets, Net - Summary of Intangible Assets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "shortName": "Intangible Assets, Net - Summary of Intangible Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock", "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R64": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AmortizationOfIntangibleAssets", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100630 - Disclosure - Intangible Assets, Net - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetAdditionalInformationDetails", "shortName": "Intangible Assets, Net - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "us-gaap:IntangibleAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AmortizationOfIntangibleAssets", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R65": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100640 - Disclosure - Intangible Assets, Net - Summary of Amortization Expenses of Intangible Assets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails", "shortName": "Intangible Assets, Net - Summary of Amortization Expenses of Intangible Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R66": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:SummaryOfLandUseRightTableTextBlock", "stg:LandUseRightTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "stg:LandUseRightGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100650 - Disclosure - Land Use Right, Net - Summary of Land Use Right (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails", "shortName": "Land Use Right, Net - Summary of Land Use Right (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:SummaryOfLandUseRightTableTextBlock", "stg:LandUseRightTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "stg:LandUseRightGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R67": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "stg:LandUseRightNet", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100660 - Disclosure - Land Use Right, Net - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails", "shortName": "Land Use Right, Net - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "stg:LandUseRightTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "stg:AmortizationOfLandUseRight", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R68": { "firstAnchor": { "ancestors": [ "p", "us-gaap:EquityMethodInvestmentsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IncomeLossFromEquityMethodInvestments", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100670 - Disclosure - Long-Term Investments - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails", "shortName": "Long-Term Investments - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:EquityMethodInvestmentsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapPartnerTypeOfPartnersCapitalAccountAxis_us-gaapLimitedPartnerMember_20211231", "decimals": "INF", "lang": null, "name": "stg:NumberOfInvestments", "reportCount": 1, "unique": true, "unitRef": "U_stgInvestment", "xsiNil": "false" } }, "R69": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfOtherAssetsNoncurrentTextBlock", "stg:OtherNonCurrentAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PrepaidExpenseNoncurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100680 - Disclosure - Other Non-Current Assets - Summary of Other Non-Current Assets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails", "shortName": "Other Non-Current Assets - Summary of Other Non-Current Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfOtherAssetsNoncurrentTextBlock", "stg:OtherNonCurrentAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PrepaidExpenseNoncurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20181231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100060 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' DEFICIT", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT", "shortName": "CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' DEFICIT", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapStatementClassOfStockAxis_us-gaapCommonClassAMember_us-gaapStatementEquityComponentsAxis_us-gaapCommonStockMember_20181231", "decimals": "-3", "lang": null, "name": "us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R70": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CustomerRefundLiabilityCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100690 - Disclosure - Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Liabilities (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails", "shortName": "Accrued Expenses and Other Current Liabilities - Summary of Accrued Expenses and Other Liabilities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccruedLiabilitiesTableTextBlock", "us-gaap:AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CustomerRefundLiabilityCurrent", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R71": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100700 - Disclosure - Revenues and Deferred Revenue - Schedule of Disaggregated Revenues (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "shortName": "Revenues and Deferred Revenue - Schedule of Disaggregated Revenues (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R72": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ContractWithCustomerLiability", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100710 - Disclosure - Revenues and Deferred Revenue - Schedule of Movement of the Deferred Revenue (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails", "shortName": "Revenues and Deferred Revenue - Schedule of Movement of the Deferred Revenue (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "stg:CustomerWithContractLiabilityAdditions", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R73": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ContractWithCustomerAssetAndLiabilityTableTextBlock", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ContractWithCustomerLiability", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100720 - Disclosure - Revenues and Deferred Revenue - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails", "shortName": "Revenues and Deferred Revenue - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R74": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapRevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_2022-01-01_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueRemainingPerformanceObligation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100730 - Disclosure - Revenues and Deferred Revenue - Additional Information (Details1)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1", "shortName": "Revenues and Deferred Revenue - Additional Information (Details1)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "us-gaap:RevenueFromContractWithCustomerTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapRevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_2022-01-01_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:RevenueRemainingPerformanceObligation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R75": { "firstAnchor": { "ancestors": [ "us-gaap:DebtInstrumentFrequencyOfPeriodicPayment", "p", "us-gaap:LongTermDebtTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210701_20210731", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtInstrumentTerm", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100740 - Disclosure - Long-Term Debt - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails", "shortName": "Long-Term Debt - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "us-gaap:DebtInstrumentFrequencyOfPeriodicPayment", "p", "us-gaap:LongTermDebtTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210701_20210731", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtInstrumentTerm", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R76": { "firstAnchor": { "ancestors": [ "p", "stg:OrdinarySharesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20150918", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockSharesAuthorized", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100750 - Disclosure - Ordinary Shares - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "shortName": "Ordinary Shares - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "stg:OrdinarySharesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "stg:TransferredToDesignatedAgentAccountForShareRepurchase", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R77": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "us-gaap:FairValueDisclosuresTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsRecurringMember_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InvestmentsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100760 - Disclosure - Fair Value Measurement - Schedule of Assets Measured at Fair Value on Recurring Basis (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails", "shortName": "Fair Value Measurement - Schedule of Assets Measured at Fair Value on Recurring Basis (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "us-gaap:FairValueDisclosuresTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsRecurringMember_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InvestmentsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R78": { "firstAnchor": { "ancestors": [ "p", "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:NumberOfDeconsolidatedEntities", "reportCount": 1, "unitRef": "U_stgEntity", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100770 - Disclosure - Disposal of Subsidiaries - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiariesAdditionalInformationDetails", "shortName": "Disposal of Subsidiaries - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R79": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100780 - Disclosure - Share Incentive Plan - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "shortName": "Share Incentive Plan - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100070 - Statement - CONSOLIDATED STATEMENTS OF CASHFLOWS", "role": "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS", "shortName": "CONSOLIDATED STATEMENTS OF CASHFLOWS", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:ShareBasedCompensation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R80": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapAwardTypeAxis_us-gaapEmployeeStockOptionMember_20201231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100790 - Disclosure - Share Incentive Plan - Summary of Option Activities (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails", "shortName": "Share Incentive Plan - Summary of Option Activities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapAwardTypeAxis_us-gaapEmployeeStockOptionMember_20210101_20211231", "decimals": "INF", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R81": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AllocatedShareBasedCompensationExpense", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100800 - Disclosure - Share Incentive Plan - Schedule of Share-based Compensation Expense Recognized (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "shortName": "Share Incentive Plan - Schedule of Share-based Compensation Expense Recognized (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R82": { "firstAnchor": { "ancestors": [ "p", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeaseLeaseNotYetCommencedDescription", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100810 - Disclosure - Leases - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesAdditionalInformationDetails", "shortName": "Leases - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeaseLeaseNotYetCommencedDescription", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R83": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:LesseeScheduleOfOperatingLeaseTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasePayments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100820 - Disclosure - Leases - Summary of Operating Leases (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfOperatingLeasesDetails", "shortName": "Leases - Summary of Operating Leases (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "stg:LesseeScheduleOfOperatingLeaseTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeasePayments", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R84": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100830 - Disclosure - Leases - Summary of Maturity Analysis of Annual Undiscounted Cash Flows for Lease Liabilities (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails", "shortName": "Leases - Summary of Maturity Analysis of Annual Undiscounted Cash Flows for Lease Liabilities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R85": { "firstAnchor": { "ancestors": [ "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100850 - Disclosure - Income Taxes - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "shortName": "Income Taxes - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "0", "lang": null, "name": "stg:IncomeTaxExpenseBenefitIfTaxHolidaysGrantedWereNotAvailable", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R86": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100860 - Disclosure - Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Statutory Income Tax Rate Applicable to PRC Operations (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails", "shortName": "Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Statutory Income Tax Rate Applicable to PRC Operations (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R87": { "firstAnchor": { "ancestors": [ "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100870 - Disclosure - Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Statutory Income Tax Rate Applicable to PRC Operations (Parenthetical) (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsParentheticalDetails", "shortName": "Income Taxes - Schedule of Reconciliation of Effective Tax Rate and Statutory Income Tax Rate Applicable to PRC Operations (Parenthetical) (Details)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R88": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100880 - Disclosure - Income Taxes - Schedule of Components of Deferred Income Tax (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails", "shortName": "Income Taxes - Schedule of Components of Deferred Income Tax (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R89": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100890 - Disclosure - Net (Loss) / Income Per Share - Schedule of Calculation of Net Loss Per Share (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "shortName": "Net (Loss) / Income Per Share - Schedule of Calculation of Net Loss Per Share (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R9": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100080 - Disclosure - Organization and Basis of Presentation", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentation", "shortName": "Organization and Basis of Presentation", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R90": { "firstAnchor": { "ancestors": [ "p", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_us-gaapEmployeeStockOptionMember_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100900 - Disclosure - Net (Loss) / Income Per Share - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails", "shortName": "Net (Loss) / Income Per Share - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_us-gaapEmployeeStockOptionMember_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R91": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:EquityMethodInvestmentsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_us-gaapInvestmentTypeAxis_stgLongTermInvestmentsMember_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ContractualObligation", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100910 - Disclosure - Commitment and Contingencies - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails", "shortName": "Commitment and Contingencies - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R92": { "firstAnchor": { "ancestors": [ "us-gaap:NumberOfOperatingSegments", "us-gaap:NumberOfOperatingSegments", "p", "us-gaap:SegmentReportingDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:NumberOfOperatingSegments", "reportCount": 1, "unique": true, "unitRef": "U_stgSegment", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100920 - Disclosure - Segment Reporting - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetails", "shortName": "Segment Reporting - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "us-gaap:NumberOfOperatingSegments", "us-gaap:NumberOfOperatingSegments", "p", "us-gaap:SegmentReportingDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:NumberOfOperatingSegments", "reportCount": 1, "unique": true, "unitRef": "U_stgSegment", "xsiNil": "false" } }, "R93": { "firstAnchor": { "ancestors": [ "span", "p", "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanCostRecognized", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100930 - Disclosure - Employee Defined Contribution Plan - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureEmployeeDefinedContributionPlanAdditionalInformationDetails", "shortName": "Employee Defined Contribution Plan - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "us-gaap:CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanCostRecognized", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R94": { "firstAnchor": { "ancestors": [ "p", "us-gaap:RestrictedAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:PortionOfAfterTaxProfitToBeAllocatedToGeneralReserveUnderPrcLaw", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100940 - Disclosure - Restricted Net Assets - Additional Information (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails", "shortName": "Restricted Net Assets - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:RestrictedAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "INF", "first": true, "lang": null, "name": "stg:PortionOfAfterTaxProfitToBeAllocatedToGeneralReserveUnderPrcLaw", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R95": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100950 - Disclosure - Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "shortName": "Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R96": { "firstAnchor": { "ancestors": [ "p", "stg:OrdinarySharesDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20150918", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100960 - Disclosure - Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Parenthetical) (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "shortName": "Financial Statement Schedule I - Condensed Financial Information of Parent Company Balance Sheets (Parenthetical) (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "us-gaap:CommonStockParOrStatedValuePerShare", "p", "td", "tr", "table", "div", "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_srtParentCompanyMember_us-gaapStatementClassOfStockAxis_us-gaapCommonClassAMember_20211231", "decimals": "INF", "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" } }, "R97": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CostOfRevenue", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100970 - Disclosure - Financial Statement Schedule I - Condensed Financial Information of Parent Company Statements of Operations (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "shortName": "Financial Statement Schedule I - Condensed Financial Information of Parent Company Statements of Operations (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:CostOfRevenue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R98": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100980 - Disclosure - Financial Statement Schedule I - Condensed Financial Information of Parent Company Consolidated Statements of Comprehensive (Loss) / Income (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "shortName": "Financial Statement Schedule I - Condensed Financial Information of Parent Company Consolidated Statements of Comprehensive (Loss) / Income (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } }, "R99": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_20210101_20211231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "reportCount": 1, "unitRef": "U_iso4217CNY", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100990 - Disclosure - Financial Statement Schedule I - Condensed Financial Information of Parent Company Statements of Cash Flows (Details)", "role": "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "shortName": "Financial Statement Schedule I - Condensed Financial Information of Parent Company Statements of Cash Flows (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "body", "html" ], "baseRef": "stg-20f_20211231.htm", "contextRef": "C_0001723935_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20210101_20211231", "decimals": "-3", "lang": null, "name": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "reportCount": 1, "unique": true, "unitRef": "U_iso4217CNY", "xsiNil": "false" } } }, "segmentCount": 75, "tag": { "dei_AddressTypeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "An entity may have several addresses for different purposes and this domain represents all such types.", "label": "Address Type [Domain]", "terseLabel": "Address Type" } } }, "localname": "AddressTypeDomain", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_AuditorFirmId": { "auth_ref": [ "r727", "r728", "r729" ], "lang": { "en-us": { "role": { "documentation": "PCAOB issued Audit Firm Identifier", "label": "Auditor Firm Id", "terseLabel": "Auditor Firm ID" } } }, "localname": "AuditorFirmId", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "nonemptySequenceNumberItemType" }, "dei_AuditorLocation": { "auth_ref": [ "r727", "r728", "r729" ], "lang": { "en-us": { "role": { "label": "Auditor Location", "terseLabel": "Auditor Location" } } }, "localname": "AuditorLocation", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "internationalNameItemType" }, "dei_AuditorName": { "auth_ref": [ "r727", "r728", "r729" ], "lang": { "en-us": { "role": { "label": "Auditor Name", "terseLabel": "Auditor Name" } } }, "localname": "AuditorName", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "internationalNameItemType" }, "dei_BusinessContactMember": { "auth_ref": [ "r728", "r729" ], "lang": { "en-us": { "role": { "documentation": "Business contact for the entity", "label": "Business Contact [Member]", "terseLabel": "Business Contact" } } }, "localname": "BusinessContactMember", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "domainItemType" }, "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_ContactPersonnelEmailAddress": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Email address of contact personnel.", "label": "Contact Personnel Email Address", "terseLabel": "Contact Personnel Email Address" } } }, "localname": "ContactPersonnelEmailAddress", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_ContactPersonnelName": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of contact personnel", "label": "Contact Personnel Name", "terseLabel": "Contact Personnel Name" } } }, "localname": "ContactPersonnelName", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_CoverAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Cover page.", "label": "Cover [Abstract]" } } }, "localname": "CoverAbstract", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentAccountingStandard": { "auth_ref": [ "r728" ], "lang": { "en-us": { "role": { "documentation": "The basis of accounting the registrant has used to prepare the financial statements included in this filing This can either be 'U.S. GAAP', 'International Financial Reporting Standards', or 'Other'.", "label": "Document Accounting Standard", "terseLabel": "Document Accounting Standard" } } }, "localname": "DocumentAccountingStandard", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "accountingStandardItemType" }, "dei_DocumentAnnualReport": { "auth_ref": [ "r727", "r728", "r729" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as an annual report.", "label": "Document Annual Report", "terseLabel": "Document Annual Report" } } }, "localname": "DocumentAnnualReport", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. 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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentRegistrationStatement": { "auth_ref": [ "r723" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as a registration statement.", "label": "Document Registration Statement", "terseLabel": "Document Registration Statement" } } }, "localname": "DocumentRegistrationStatement", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentShellCompanyReport": { "auth_ref": [ "r728" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true for a Shell Company Report pursuant to section 13 or 15(d) of the Exchange Act.", "label": "Document Shell Company Report", "terseLabel": "Document Shell Company Report" } } }, "localname": "DocumentShellCompanyReport", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r730" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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 Line1", "terseLabel": "Entity Address, Address Line One" } } }, "localname": "EntityAddressAddressLine1", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressAddressLine2": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Address Line 2 such as Street or Suite number", "label": "Entity Address Address Line2", "terseLabel": "Entity Address, Address Line Two" } } }, "localname": "EntityAddressAddressLine2", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressAddressLine3": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Address Line 3 such as an Office Park", "label": "Entity Address Address Line3", "terseLabel": "Entity Address, Address Line Three" } } }, "localname": "EntityAddressAddressLine3", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressCountry": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "ISO 3166-1 alpha-2 country code.", "label": "Entity Address Country", "terseLabel": "Entity Address, Country" } } }, "localname": "EntityAddressCountry", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "countryCodeItemType" }, "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityAddressesAddressTypeAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table.", "label": "Entity Addresses Address Type [Axis]", "terseLabel": "Entity Addresses, Address Type" } } }, "localname": "EntityAddressesAddressTypeAxis", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "stringItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r725" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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", "verboseLabel": "Entity Common Stock, Shares Outstanding" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r725" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityExTransitionPeriod": { "auth_ref": [ "r741" ], "lang": { "en-us": { "role": { "documentation": "Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.", "label": "Entity Ex Transition Period", "terseLabel": "Entity Ex Transition Period" } } }, "localname": "EntityExTransitionPeriod", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r725" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityIncorporationDateOfIncorporation": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Date when an entity was incorporated", "label": "Entity Incorporation Date Of Incorporation", "terseLabel": "Date of establishment/ acquisition" } } }, "localname": "EntityIncorporationDateOfIncorporation", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "dateItemType" }, "dei_EntityIncorporationStateCountryCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Two-character EDGAR code representing the state or country of incorporation.", "label": "Entity Incorporation State Country Code", "terseLabel": "Entity Incorporation, State or Country Code", "verboseLabel": "Place of establishment" } } }, "localname": "EntityIncorporationStateCountryCode", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r739" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r725" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r725" ], "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityVoluntaryFilers": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.", "label": "Entity Voluntary Filers", "terseLabel": "Entity Voluntary Filers" } } }, "localname": "EntityVoluntaryFilers", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityWellKnownSeasonedIssuer": { "auth_ref": [ "r740" ], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.", "label": "Entity Well Known Seasoned Issuer", "terseLabel": "Entity Well-known Seasoned Issuer" } } }, "localname": "EntityWellKnownSeasonedIssuer", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_IcfrAuditorAttestationFlag": { "auth_ref": [ "r727", "r728", "r729" ], "lang": { "en-us": { "role": { "label": "Icfr Auditor Attestation Flag", "terseLabel": "ICFR Auditor Attestation Flag" } } }, "localname": "IcfrAuditorAttestationFlag", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "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/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_NoTradingSymbolFlag": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a security having no trading symbol.", "label": "No Trading Symbol Flag", "terseLabel": "No Trading Symbol Flag" } } }, "localname": "NoTradingSymbolFlag", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "trueItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r724" ], "lang": { "en-us": { "role": { "documentation": "Title of a 12(b) registered security.", "label": "Security12b Title", "terseLabel": "Title of 12(b) Security" } } }, "localname": "Security12bTitle", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r726" ], "lang": { "en-us": { "role": { "documentation": "Name of the Exchange on which a security is registered.", "label": "Security Exchange Name", "terseLabel": "Security Exchange Name" } } }, "localname": "SecurityExchangeName", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "edgarExchangeCodeItemType" }, "dei_TradingSymbol": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Trading symbol of an instrument as listed on an exchange.", "label": "Trading Symbol", "terseLabel": "Trading Symbol" } } }, "localname": "TradingSymbol", "nsuri": "http://xbrl.sec.gov/dei/2021q4", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "tradingSymbolItemType" }, "srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Condensed Financial Information Of Parent Company Only Disclosure [Abstract]" } } }, "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract", "nsuri": "http://fasb.org/srt/2021-01-31", "xbrltype": "stringItemType" }, "srt_CondensedFinancialStatementsCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Condensed Financial Statements Captions [Line Items]", "terseLabel": "Condensed Financial Statements Captions [Line Items]" } } }, "localname": "CondensedFinancialStatementsCaptionsLineItems", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesAxis": { "auth_ref": [ "r140", "r283", "r287", "r292", "r469", "r470", "r479", "r480", "r572", "r719" ], "lang": { "en-us": { "role": { "label": "Consolidated Entities [Axis]", "terseLabel": "Consolidated Entities" } } }, "localname": "ConsolidatedEntitiesAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesDomain": { "auth_ref": [ "r140", "r283", "r287", "r292", "r469", "r470", "r479", "r480", "r572", "r719" ], "lang": { "en-us": { "role": { "label": "Consolidated Entities [Domain]", "terseLabel": "Consolidated Entities" } } }, "localname": "ConsolidatedEntitiesDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "domainItemType" }, "srt_MajorCustomersAxis": { "auth_ref": [ "r209", "r361", "r367", "r672" ], "lang": { "en-us": { "role": { "label": "Major Customers [Axis]", "terseLabel": "Customer" } } }, "localname": "MajorCustomersAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_MaximumMember": { "auth_ref": [ "r297", "r322", "r385", "r387", "r584", "r585", "r586", "r587", "r588", "r589", "r609", "r669", "r673", "r720", "r721" ], "lang": { "en-us": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [ "r297", "r322", "r385", "r387", "r584", "r585", "r586", "r587", "r588", "r589", "r609", "r669", "r673", "r720", "r721" ], "lang": { "en-us": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "srt_NameOfMajorCustomerDomain": { "auth_ref": [ "r209", "r361", "r367", "r672" ], "lang": { "en-us": { "role": { "label": "Name Of Major Customer [Domain]", "terseLabel": "Customer" } } }, "localname": "NameOfMajorCustomerDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_OwnershipAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Ownership [Axis]", "terseLabel": "Ownership" } } }, "localname": "OwnershipAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_OwnershipDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Ownership [Domain]", "terseLabel": "Ownership" } } }, "localname": "OwnershipDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_ParentCompanyMember": { "auth_ref": [ "r140" ], "lang": { "en-us": { "role": { "label": "Parent Company [Member]", "terseLabel": "Parent Company" } } }, "localname": "ParentCompanyMember", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r205", "r361", "r365", "r615", "r668", "r670" ], "lang": { "en-us": { "role": { "label": "Product Or Service [Axis]", "terseLabel": "Product and Service" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [ "r205", "r361", "r365", "r615", "r668", "r670" ], "lang": { "en-us": { "role": { "label": "Products And Services [Domain]", "terseLabel": "Product and Service" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [ "r297", "r322", "r375", "r385", "r387", "r584", "r585", "r586", "r587", "r588", "r589", "r609", "r669", "r673", "r720", "r721" ], "lang": { "en-us": { "role": { "label": "Range [Axis]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [ "r297", "r322", "r375", "r385", "r387", "r584", "r585", "r586", "r587", "r588", "r589", "r609", "r669", "r673", "r720", "r721" ], "lang": { "en-us": { "role": { "label": "Range [Member]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "srt_ScenarioUnspecifiedDomain": { "auth_ref": [ "r153", "r157", "r386" ], "lang": { "en-us": { "role": { "label": "Scenario Unspecified [Domain]", "terseLabel": "Scenario" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_ScheduleOfCondensedFinancialStatementsTable": { "auth_ref": [ "r140", "r462" ], "lang": { "en-us": { "role": { "label": "Schedule Of Condensed Financial Statements [Table]", "terseLabel": "Schedule Of Condensed Financial Statements [Table]" } } }, "localname": "ScheduleOfCondensedFinancialStatementsTable", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails" ], "xbrltype": "stringItemType" }, "srt_SegmentGeographicalDomain": { "auth_ref": [ "r206", "r207", "r361", "r366", "r671", "r710", "r711", "r712", "r713", "r714", "r715", "r716", "r717", "r718" ], "lang": { "en-us": { "role": { "label": "Segment Geographical [Domain]", "terseLabel": "Geographical" } } }, "localname": "SegmentGeographicalDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "domainItemType" }, "srt_StatementGeographicalAxis": { "auth_ref": [ "r206", "r207", "r361", "r366", "r671", "r704", "r710", "r711", "r712", "r713", "r714", "r715", "r716", "r717", "r718" ], "lang": { "en-us": { "role": { "label": "Statement Geographical [Axis]", "terseLabel": "Geographical" } } }, "localname": "StatementGeographicalAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "stringItemType" }, "srt_StatementScenarioAxis": { "auth_ref": [ "r153", "r157", "r279", "r386", "r577" ], "lang": { "en-us": { "role": { "label": "Statement Scenario [Axis]", "terseLabel": "Scenario" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualAxis": { "auth_ref": [ "r211", "r571" ], "lang": { "en-us": { "role": { "label": "Title Of Individual [Axis]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualAxis", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualWithRelationshipToEntityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Title Of Individual With Relationship To Entity [Domain]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualWithRelationshipToEntityDomain", "nsuri": "http://fasb.org/srt/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_AmericanDepositorySharesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "American depository shares.", "label": "American Depository Shares [Member]", "terseLabel": "American Depository Shares" } } }, "localname": "AmericanDepositorySharesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_AmortizationOfLandUseRight": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortization of land use right.", "label": "Amortization Of Land Use Right", "terseLabel": "Amortization expenses of land use right" } } }, "localname": "AmortizationOfLandUseRight", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_BasisOfPresentationAndUseOfEstimatesPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Basis of presentation and use of estimates.", "label": "Basis Of Presentation And Use Of Estimates Policy [Text Block]", "terseLabel": "Basis of presentation and use of estimates" } } }, "localname": "BasisOfPresentationAndUseOfEstimatesPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_BeijingBaobianConsumerTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Beijing Baobian Consumer Technology Company Limited.", "label": "Beijing Baobian Consumer Technology Company Limited [Member]", "terseLabel": "Beijing Baobian Consumer Technology Co., Ltd." } } }, "localname": "BeijingBaobianConsumerTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_BeijingJiayanOnlineEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Beijing Jiayan Online Education Technology Company Limited.", "label": "Beijing Jiayan Online Education Technology Company Limited [Member]", "terseLabel": "Beijing Jiayan Online Education Technology Co., Ltd." } } }, "localname": "BeijingJiayanOnlineEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_BeijingShangdeOnlineEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Beijing Shangde Online Education Technology Company Limited.", "label": "Beijing Shangde Online Education Technology Company Limited [Member]", "terseLabel": "Beijing Shangde Online Education Technology Company Limited", "verboseLabel": "Beijing Sunlands" } } }, "localname": "BeijingShangdeOnlineEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_BeijingShangrenChongyeEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Beijing Shangren Chongye Education Technology Company Limited.", "label": "Beijing Shangren Chongye Education Technology Company Limited [Member]", "terseLabel": "Beijing Shangren Chongye Education Technology Co., Ltd." } } }, "localname": "BeijingShangrenChongyeEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_BeijingSunlandsOnlineEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Beijing sunlands online education technology company limited.", "label": "Beijing Sunlands Online Education Technology Company Limited [Member]", "terseLabel": "Beijing Sunlands Online Education Technology Co., Ltd. (\"Beijing Sunlands\")" } } }, "localname": "BeijingSunlandsOnlineEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_CashAndCashEquivalentsAtCarryingValueAvailableForConversionToForeignCurrency": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Cash and cash equivalents at carrying value available for conversion to foreign currency.", "label": "Cash And Cash Equivalents At Carrying Value Available For Conversion To Foreign Currency", "terseLabel": "Cash and cash equivalents available for conversion to foreign currency" } } }, "localname": "CashAndCashEquivalentsAtCarryingValueAvailableForConversionToForeignCurrency", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_CommissionsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Commissions [Member]", "label": "Commissions [Member]", "terseLabel": "Commissions" } } }, "localname": "CommissionsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "domainItemType" }, "stg_CommitmentsAndContingenciesDisclosureLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Commitments and contingencies disclosure.", "label": "Commitments And Contingencies Disclosure [Line Items]", "terseLabel": "Commitments And Contingencies Disclosure [Line Items]" } } }, "localname": "CommitmentsAndContingenciesDisclosureLineItems", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_CommitmentsAndContingenciesDisclosureTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Commitments and contingencies disclosure.", "label": "Commitments And Contingencies Disclosure [Table]", "terseLabel": "Commitments And Contingencies Disclosure [Table]" } } }, "localname": "CommitmentsAndContingenciesDisclosureTable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_ContractWithCustomerLiabilityDeductions": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Contract with customer liability deductions.", "label": "Contract With Customer Liability Deductions", "negatedLabel": "Deductions" } } }, "localname": "ContractWithCustomerLiabilityDeductions", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails" ], "xbrltype": "monetaryItemType" }, "stg_ConvenienceTranslationPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Convenience translation.", "label": "Convenience Translation Policy [Text Block]", "terseLabel": "Convenience Translation" } } }, "localname": "ConvenienceTranslationPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_CustomerMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Customer.", "label": "Customer [Member]", "terseLabel": "Customer" } } }, "localname": "CustomerMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_CustomerWithContractLiabilityAdditions": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Customer with contract liability additions.", "label": "Customer With Contract Liability Additions", "terseLabel": "Additions" } } }, "localname": "CustomerWithContractLiabilityAdditions", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails" ], "xbrltype": "monetaryItemType" }, "stg_DebtInstrumentNumberOfLoanAgreement": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Debt instrument number of loan agreement.", "label": "Debt Instrument Number Of Loan Agreement", "terseLabel": "Debt instrument number of loan agreement" } } }, "localname": "DebtInstrumentNumberOfLoanAgreement", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_DeferredCostsDisclosureTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for Deferred\u200b costs\u200b at the end of the reporting period.", "label": "Deferred Costs Disclosure [Text Block]", "terseLabel": "Deferred Costs" } } }, "localname": "DeferredCostsDisclosureTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCosts" ], "xbrltype": "textBlockItemType" }, "stg_DeferredCostsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Deferred costs.", "label": "Deferred Costs Table [Text Block]", "terseLabel": "Schedule of Movement of Deferred Costs" } } }, "localname": "DeferredCostsTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsTables" ], "xbrltype": "textBlockItemType" }, "stg_DeferredSalesInducementsNetOfImpairment": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred sales inducements net of impairment.", "label": "Deferred Sales Inducements Net Of Impairment", "periodEndLabel": "Ending balances (current and non-current), Net of impairment" } } }, "localname": "DeferredSalesInducementsNetOfImpairment", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails" ], "xbrltype": "monetaryItemType" }, "stg_DeferredTaxAssetsAdvertisingExpensesCarryforwards": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": 10040.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferred tax assets advertising expenses carryforwards.", "label": "Deferred Tax Assets Advertising Expenses Carryforwards", "terseLabel": "Advertising expenses carry-forwards" } } }, "localname": "DeferredTaxAssetsAdvertisingExpensesCarryforwards", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "stg_DeficitsOfInvestmentsInSubsidiariesVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesNoncurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10100.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deficits of investments in subsidiaries, variable interest entities and variable interest entities subsidiaries, noncurrent.", "label": "Deficits Of Investments In Subsidiaries Variable Interest Entities And Variable Interest Entities Subsidiaries Noncurrent", "terseLabel": "Deficits of investments in subsidiaries, VIEs and VIEs' subsidiaries" } } }, "localname": "DeficitsOfInvestmentsInSubsidiariesVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesNoncurrent", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails" ], "xbrltype": "monetaryItemType" }, "stg_DegreeOrDiplomaOrientedPostSecondaryCoursesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Degree- or diploma-oriented post-secondary courses.", "label": "Degree Or Diploma Oriented Post Secondary Courses [Member]", "terseLabel": "Degree- or Diploma-oriented Post-secondary Courses" } } }, "localname": "DegreeOrDiplomaOrientedPostSecondaryCoursesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_DepositarySharesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Depositary shares.", "label": "Depositary Shares [Member]", "terseLabel": "American Depositary Shares" } } }, "localname": "DepositarySharesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "domainItemType" }, "stg_ElectronicAndOfficeEquipmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Electronic and office equipment.", "label": "Electronic And Office Equipment [Member]", "terseLabel": "Electronic And Office Equipment" } } }, "localname": "ElectronicAndOfficeEquipmentMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "stg_FirstTwoMillionProfitsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "First two million profits.", "label": "First Two Million Profits [Member]", "terseLabel": "For the First 2 Million Profits" } } }, "localname": "FirstTwoMillionProfitsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_GovernmentSubsidies": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Government Subsidies.", "label": "Government Subsidies", "terseLabel": "Government subsidies" } } }, "localname": "GovernmentSubsidies", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_GovernmentSubsidiesPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Government subsidies.", "label": "Government Subsidies Policy [Text Block]", "terseLabel": "Government subsidies" } } }, "localname": "GovernmentSubsidiesPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_GuangzhouMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Guangzhou.", "label": "Guangzhou [Member]", "terseLabel": "Guangzhou" } } }, "localname": "GuangzhouMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "domainItemType" }, "stg_ImpairmentLossOnShortTermInvestments": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Impairment loss on short-term investments.", "label": "Impairment Loss On Short Term Investments", "terseLabel": "Impairment on short-term investments" } } }, "localname": "ImpairmentLossOnShortTermInvestments", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_IncomeTaxExpenseBenefitIfTaxHolidaysGrantedWereNotAvailable": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Income tax expense (benefit) if the tax holidays granted were not available.", "label": "Income Tax Expense Benefit If Tax Holidays Granted Were Not Available", "negatedLabel": "Income tax expenses if the tax holidays granted to Wuhan Shangde were not available" } } }, "localname": "IncomeTaxExpenseBenefitIfTaxHolidaysGrantedWereNotAvailable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_IncomeTaxPreferentialTaxRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the preferential tax rate applicable to the entity under the preferential tax treatment.", "label": "Income Tax Preferential Tax Rate", "terseLabel": "Preferential tax rate description" } } }, "localname": "IncomeTaxPreferentialTaxRate", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_IncomeTaxReconciliationEffectOfTaxHolidaysAndTaxRateDifference": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails": { "order": 10030.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Income tax reconciliation effect of tax holidays and tax rate difference.", "label": "Income Tax Reconciliation Effect Of Tax Holidays And Tax Rate Difference", "terseLabel": "Effect of tax holidays and tax rate difference" } } }, "localname": "IncomeTaxReconciliationEffectOfTaxHolidaysAndTaxRateDifference", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails" ], "xbrltype": "monetaryItemType" }, "stg_IncomeTaxReconciliationNonDeductibleAndSuperDeductionExpense": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails": { "order": 10020.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Income tax reconciliation non-deductible and (super deduction) expense.", "label": "Income Tax Reconciliation Non Deductible And Super Deduction Expense", "terseLabel": "Non-deductible and super deduction expenses" } } }, "localname": "IncomeTaxReconciliationNonDeductibleAndSuperDeductionExpense", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails" ], "xbrltype": "monetaryItemType" }, "stg_IncomeTaxesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Income taxes.", "label": "Income Taxes [Line Items]", "terseLabel": "Income Taxes [Line Items]" } } }, "localname": "IncomeTaxesLineItems", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_IncomeTaxesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Income taxes.", "label": "Income Taxes [Table]", "terseLabel": "Income Taxes [Table]" } } }, "localname": "IncomeTaxesTable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_IncreaseDecreaseInDeferredTaxAssets": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10310.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in deferred tax assets.", "label": "Increase Decrease In Deferred Tax Assets", "negatedLabel": "Deferred tax assets" } } }, "localname": "IncreaseDecreaseInDeferredTaxAssets", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_IncreaseDecreaseInDeferredTaxLiabilities": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10360.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in deferred tax liabilities.", "label": "Increase Decrease In Deferred Tax Liabilities", "terseLabel": "Deferred tax liabilities" } } }, "localname": "IncreaseDecreaseInDeferredTaxLiabilities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_IncreaseDecreaseInLeaseLiability": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10350.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in lease liability.", "label": "Increase Decrease In Lease Liability", "terseLabel": "Lease liabilities" } } }, "localname": "IncreaseDecreaseInLeaseLiability", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_IncreaseDecreaseInRightOfUseAsset": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10300.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in right-of-use asset.", "label": "Increase Decrease In Right Of Use Asset", "negatedLabel": "Right-of-use asset" } } }, "localname": "IncreaseDecreaseInRightOfUseAsset", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_LandUseRightAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right.", "label": "Land Use Right [Abstract]" } } }, "localname": "LandUseRightAbstract", "nsuri": "http://www.sunlands.com/20211231", "xbrltype": "stringItemType" }, "stg_LandUseRightAccumulatedAmortization": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails": { "order": 10020.0, "parentTag": "stg_LandUseRightNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Land use right accumulated amortization.", "label": "Land Use Right Accumulated Amortization", "negatedLabel": "Less: Accumulated amortization" } } }, "localname": "LandUseRightAccumulatedAmortization", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails" ], "xbrltype": "monetaryItemType" }, "stg_LandUseRightGross": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails": { "order": 10010.0, "parentTag": "stg_LandUseRightNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Land use right gross.", "label": "Land Use Right Gross", "terseLabel": "Land use right" } } }, "localname": "LandUseRightGross", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails" ], "xbrltype": "monetaryItemType" }, "stg_LandUseRightLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right.", "label": "Land Use Right [Line Items]", "terseLabel": "Land Use Right [Line Items]" } } }, "localname": "LandUseRightLineItems", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_LandUseRightNet": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10290.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Land use right, net.", "label": "Land Use Right Net", "terseLabel": "Land use right, net", "totalLabel": "Land use right, net" } } }, "localname": "LandUseRightNet", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetSummaryOfLandUseRightDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "stg_LandUseRightNetPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right net.", "label": "Land Use Right Net Policy [Text Block]", "terseLabel": "Land use right, net" } } }, "localname": "LandUseRightNetPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_LandUseRightTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right.", "label": "Land Use Right [Table]", "terseLabel": "Land Use Right [Table]" } } }, "localname": "LandUseRightTable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_LandUseRightTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right.", "label": "Land Use Right [Text Block]", "terseLabel": "Land Use Right, Net" } } }, "localname": "LandUseRightTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNet" ], "xbrltype": "textBlockItemType" }, "stg_LandUseRightUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use right useful life.", "label": "Land Use Right Useful Life", "terseLabel": "Land Use Right Useful Life" } } }, "localname": "LandUseRightUsefulLife", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "stg_LandUseRightsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Land use rights.", "label": "Land Use Rights [Member]", "terseLabel": "Land Use Right" } } }, "localname": "LandUseRightsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_LeaseholdAndBuildingsImprovementsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Leasehold and buildings improvements.", "label": "Leasehold And Buildings Improvements [Member]", "terseLabel": "Leasehold And Buildings Improvements" } } }, "localname": "LeaseholdAndBuildingsImprovementsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "stg_LesseeOperatingLeaseLiabilityPaymentsDueYearFiveAndAfterYearFive": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10070.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Lessee, operating lease, liability, payments, due year five and after year five.", "label": "Lessee Operating Lease Liability Payments Due Year Five And After Year Five", "terseLabel": "2027 and thereafter" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFiveAndAfterYearFive", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "stg_LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndAfterYearFour": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10060.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Lessee operating lease liability payments due year four and after year four.", "label": "Lessee Operating Lease Liability Payments Due Year Four And After Year Four", "terseLabel": "2024 and thereafter" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFourAndAfterYearFour", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "stg_LesseeScheduleOfOperatingLeaseTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Lessee, schedule of operating lease.", "label": "Lessee Schedule Of Operating Lease Table [Text Block]", "terseLabel": "Summary of Operating Leases" } } }, "localname": "LesseeScheduleOfOperatingLeaseTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesTables" ], "xbrltype": "textBlockItemType" }, "stg_LongTermInvestmentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Long-term investments.", "label": "Long Term Investments [Member]", "terseLabel": "Long-term Investments", "verboseLabel": "Long-term Investments" } } }, "localname": "LongTermInvestmentsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_NetIncomeLossAvailableToCommonStockholdersBasicAndDilutedAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Net income (loss) available to common stockholders basic and diluted.", "label": "Net Income Loss Available To Common Stockholders Basic And Diluted [Abstract]", "terseLabel": "Numerator:" } } }, "localname": "NetIncomeLossAvailableToCommonStockholdersBasicAndDilutedAbstract", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails" ], "xbrltype": "stringItemType" }, "stg_NumberOfDeconsolidatedEntities": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of deconsolidated entities.", "label": "Number Of Deconsolidated Entities", "verboseLabel": "Number of deconsolidated entities" } } }, "localname": "NumberOfDeconsolidatedEntities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiariesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_NumberOfEmployees": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of employees.", "label": "Number Of Employees", "terseLabel": "Number of employees" } } }, "localname": "NumberOfEmployees", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_NumberOfInvestments": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of investments.", "label": "Number Of Investments", "terseLabel": "Number of investments" } } }, "localname": "NumberOfInvestments", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_NumberOfPerformanceObligation": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of performance obligation.", "label": "Number Of Performance Obligation", "terseLabel": "Number of performance obligation" } } }, "localname": "NumberOfPerformanceObligation", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_NumberOfPropertiesAcquired": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of properties acquired.", "label": "Number Of Properties Acquired", "terseLabel": "Number of buildings purchased" } } }, "localname": "NumberOfPropertiesAcquired", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "integerItemType" }, "stg_NumberOfVoteOrdinarySharesEntitled": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of vote ordinary shares entitled.", "label": "Number Of Vote Ordinary Shares Entitled", "terseLabel": "Number of vote each ordinary shares entitled" } } }, "localname": "NumberOfVoteOrdinarySharesEntitled", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "stg_OnlineEducationServiceAndInsuranceServiceMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Online Education Service and Insurance Service.", "label": "Online Education Service And Insurance Service [Member]", "terseLabel": "Online Education Service and Insurance Service [Member]" } } }, "localname": "OnlineEducationServiceAndInsuranceServiceMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_OnlineEducationalCoursesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Online educational courses.", "label": "Online Educational Courses [Member]", "verboseLabel": "Subtotal Online Educational Courses" } } }, "localname": "OnlineEducationalCoursesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "domainItemType" }, "stg_OperatingLeaseNoncashChangesInRightOfUseAssetsFromNewLeaseObligations": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Operating lease noncash changes in right-of-use assets from new lease obligations.", "label": "Operating Lease Noncash Changes In Right Of Use Assets From New Lease Obligations", "terseLabel": "Noncash changes in right-of-use assets from new lease obligations and lease modification: Operating leases" } } }, "localname": "OperatingLeaseNoncashChangesInRightOfUseAssetsFromNewLeaseObligations", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfOperatingLeasesDetails" ], "xbrltype": "monetaryItemType" }, "stg_OperatingLossCarryforwardsExpirationEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Operating loss carryforwards expiration end date.", "label": "Operating Loss Carryforwards Expiration End Date", "terseLabel": "Expiration end date" } } }, "localname": "OperatingLossCarryforwardsExpirationEndDate", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "dateItemType" }, "stg_OperatingLossCarryforwardsExpirationStartDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Operating loss carryforwards expiration start date.", "label": "Operating Loss Carryforwards Expiration Start Date", "terseLabel": "Expiration start date" } } }, "localname": "OperatingLossCarryforwardsExpirationStartDate", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "dateItemType" }, "stg_OptionAgreementMaximumContractAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Option agreement maximum contract amount.", "label": "Option Agreement Maximum Contract Amount", "terseLabel": "Option agreement maximum contract amount" } } }, "localname": "OptionAgreementMaximumContractAmount", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_OrdinarySharesDisclosureTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Ordinary shares disclosure.", "label": "Ordinary Shares Disclosure [Text Block]", "terseLabel": "Ordinary Shares" } } }, "localname": "OrdinarySharesDisclosureTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinaryShares" ], "xbrltype": "textBlockItemType" }, "stg_OtherAssetsNoncurrentEmployeeLoans": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails": { "order": 10020.0, "parentTag": "us-gaap_OtherAssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Other assets noncurrent employee loans.", "label": "Other Assets Noncurrent Employee Loans", "terseLabel": "Employee loans" } } }, "localname": "OtherAssetsNoncurrentEmployeeLoans", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "stg_OtherNonCurrentAssetsDisclosureTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Other non-current assets disclosure.", "label": "Other Non Current Assets Disclosure [Text Block]", "terseLabel": "Other Non-Current Assets" } } }, "localname": "OtherNonCurrentAssetsDisclosureTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssets" ], "xbrltype": "textBlockItemType" }, "stg_OtherRevenueMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Other revenue.", "label": "Other Revenue [Member]", "terseLabel": "Other Revenue" } } }, "localname": "OtherRevenueMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "domainItemType" }, "stg_PRCBankMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "PRC Bank.", "label": "P R C Bank [Member]", "terseLabel": "PRC Bank" } } }, "localname": "PRCBankMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_PayableForLeaseholdImprovementAndIntangibleAssets": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10080.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payables for leasehold improvement and intangible assets.", "label": "Payable For Leasehold Improvement And Intangible Assets", "terseLabel": "Payables for leasehold improvement and intangible assets" } } }, "localname": "PayableForLeaseholdImprovementAndIntangibleAssets", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "stg_PayablesForLeaseholdImprovementAndIntangibleAssets": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Future cash outflow to pay for leasehold improvement and intangible assets.", "label": "Payables For Leasehold Improvement And Intangible Assets", "terseLabel": "Payables for leasehold improvement and intangible assets" } } }, "localname": "PayablesForLeaseholdImprovementAndIntangibleAssets", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_PayablesToAcquireBuildingsCurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10230.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of payables to acquire buildings. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Payables To Acquire Buildings Current", "positiveLabel": "Payables to acquire buildings", "terseLabel": "Payables to acquire buildings (including payables to acquire buildings of the consolidated VIEs without recourse to Sunlands Technology Group of nil and nil as of December 31, 2020 and 2021, respectively)" } } }, "localname": "PayablesToAcquireBuildingsCurrent", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "stg_PayablesToAcquiringBuildings": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Future cash outflow to pay for acquiring buildings.", "label": "Payables To Acquiring Buildings", "terseLabel": "Payables to acquire buildings" } } }, "localname": "PayablesToAcquiringBuildings", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_PayablesToEducationalInstitutions": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10040.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payables to educational institutions.", "label": "Payables To Educational Institutions", "terseLabel": "Payables to educational institutions" } } }, "localname": "PayablesToEducationalInstitutions", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "stg_PaymentToRelatedParties": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10020.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payment to related parties.", "label": "Payment To Related Parties", "negatedTerseLabel": "Share repurchase" } } }, "localname": "PaymentToRelatedParties", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails" ], "xbrltype": "monetaryItemType" }, "stg_PaymentsForEmployeeLoan": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10070.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10190.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payments for employee loan.", "label": "Payments For Employee Loan", "negatedLabel": "Loan to employees" } } }, "localname": "PaymentsForEmployeeLoan", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_PaymentsToAcquireLandUseRight": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10160.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Payments to acquire land use right.", "label": "Payments To Acquire Land Use Right", "negatedLabel": "Acquisition of land use right" } } }, "localname": "PaymentsToAcquireLandUseRight", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_PercentageOfCashAndCashEquivalentsAtCarryingValueAvailableForConversionToForeignCurrency": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage of cash and cash equivalents at carrying value available for conversion to foreign currency.", "label": "Percentage Of Cash And Cash Equivalents At Carrying Value Available For Conversion To Foreign Currency", "terseLabel": "Percentage of cash and cash equivalents available for conversion to foreign currency" } } }, "localname": "PercentageOfCashAndCashEquivalentsAtCarryingValueAvailableForConversionToForeignCurrency", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_PercentageOfVariableInterestEntityAssetsOnConsolidatedAssets": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage of variable interest entity assets on consolidated assets.", "label": "Percentage Of Variable Interest Entity Assets On Consolidated Assets", "terseLabel": "Aggregate percentage of variable interest entity assets on Group's consolidated total assets" } } }, "localname": "PercentageOfVariableInterestEntityAssetsOnConsolidatedAssets", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_PercentageOfVariableInterestEntityLiabilitiesOnConsolidatedLiabilities": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage of variable interest entity liabilities on consolidated liabilities", "label": "Percentage Of Variable Interest Entity Liabilities On Consolidated Liabilities", "terseLabel": "Aggregate percentage of variable interest entity liabilities on Group's consolidated total liabilities" } } }, "localname": "PercentageOfVariableInterestEntityLiabilitiesOnConsolidatedLiabilities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_PortionOfAfterTaxProfitToBeAllocatedToGeneralReserveUnderPrcLaw": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The maximum percentage of the appropriation to the statutory surplus fund over the after-tax profits calculated in accordance with PRC GAAP.", "label": "Portion Of After Tax Profit To Be Allocated To General Reserve Under Prc Law", "terseLabel": "Required minimum percentage of after-tax-profit allocated to general reserve" } } }, "localname": "PortionOfAfterTaxProfitToBeAllocatedToGeneralReserveUnderPrcLaw", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_PreferentialTaxExemptionApprovedEndPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Preferential tax exemption approved end period.", "label": "Preferential Tax Exemption Approved End Period", "verboseLabel": "Preferential tax exemption approved end year" } } }, "localname": "PreferentialTaxExemptionApprovedEndPeriod", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "gYearItemType" }, "stg_PreferentialTaxExemptionApprovedStartPeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Preferential tax exemption approved start period.", "label": "Preferential Tax Exemption Approved Start Period", "verboseLabel": "Preferential tax exemption approved start year" } } }, "localname": "PreferentialTaxExemptionApprovedStartPeriod", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "gYearItemType" }, "stg_PreferentialTaxRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Preferential tax rate.", "label": "Preferential Tax Rate", "terseLabel": "Preferential tax rate" } } }, "localname": "PreferentialTaxRate", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_PrepaidExpensesAndOtherCurrentAssetsTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Prepaid expenses and other current assets.", "label": "Prepaid Expenses And Other Current Assets [Text Block]", "terseLabel": "Prepaid Expenses and Other Current Assets" } } }, "localname": "PrepaidExpensesAndOtherCurrentAssetsTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssets" ], "xbrltype": "textBlockItemType" }, "stg_PrivateCompanyMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Private company.", "label": "Private Company [Member]", "terseLabel": "Private Company" } } }, "localname": "PrivateCompanyMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_ProceedsFromDisposalOfLandUseRight": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10130.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Proceeds from disposal of land use right.", "label": "Proceeds From Disposal Of Land Use Right", "terseLabel": "Proceeds from disposal of land use right" } } }, "localname": "ProceedsFromDisposalOfLandUseRight", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_ProceedsFromInterestInSubsidiaries": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10060.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Proceeds from interest in subsidiaries,", "label": "Proceeds From Interest In Subsidiaries", "terseLabel": "Amounts due from subsidiaries" } } }, "localname": "ProceedsFromInterestInSubsidiaries", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails" ], "xbrltype": "monetaryItemType" }, "stg_ProceedsFromRepaymentOfLoanToEmployees": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10080.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10200.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Proceeds from repayment of loan to employees.", "label": "Proceeds From Repayment Of Loan To Employees", "terseLabel": "Repayment of loan to employees" } } }, "localname": "ProceedsFromRepaymentOfLoanToEmployees", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_ProfessionalCertificationPreparationAndProfessionalSkillsCoursesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Professional certification preparation and professional skills courses.", "label": "Professional Certification Preparation And Professional Skills Courses [Member]", "terseLabel": "Professional Certification Preparation and Professional Skills Courses" } } }, "localname": "ProfessionalCertificationPreparationAndProfessionalSkillsCoursesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_ReceivablesFromThirdPartyPaymentAgencies": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10010.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Receivables from third party payment agencies.", "label": "Receivables From Third Party Payment Agencies", "terseLabel": "Receivables from third-party payment agencies" } } }, "localname": "ReceivablesFromThirdPartyPaymentAgencies", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "stg_RecentAccountingPronouncementsNotYetAdoptedPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Recent accounting pronouncements not yet adopted policy.", "label": "Recent Accounting Pronouncements Not Yet Adopted Policy Policy [Text Block]", "terseLabel": "Recent accounting pronouncements not yet adopted" } } }, "localname": "RecentAccountingPronouncementsNotYetAdoptedPolicyPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_RemainingProfitsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Remaining profits.", "label": "Remaining Profits [Member]", "terseLabel": "For the Remaining Profits" } } }, "localname": "RemainingProfitsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_RepaymentMadeToAcquireBuildings": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10070.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Repayment made to acquire buildings.", "label": "Repayment Made To Acquire Buildings", "negatedLabel": "Repayment made to acquire buildings" } } }, "localname": "RepaymentMadeToAcquireBuildings", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "stg_RequiredGeneralReserveRegisteredCapitalRatioToDeForceCompulsoryNetProfitAllocationToGeneralReserve": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percentage of paid in capital that the general reserve would not surpass.", "label": "Required General Reserve Registered Capital Ratio To De Force Compulsory Net Profit Allocation To General Reserve", "terseLabel": "Threshold percentage of general reserve of the registered capital" } } }, "localname": "RequiredGeneralReserveRegisteredCapitalRatioToDeForceCompulsoryNetProfitAllocationToGeneralReserve", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_RequiredPercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Required percentage of after tax profit allocated to statutory common reserve.", "label": "Required Percentage Of After Tax Profit Allocated To Statutory Common Reserve", "terseLabel": "Required minimum percentage of after-tax-profit allocated to statutory common reserve" } } }, "localname": "RequiredPercentageOfAfterTaxProfitAllocatedToStatutoryCommonReserve", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_RestrictedNetAssetsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Restricted net assets.", "label": "Restricted Net Assets [Abstract]" } } }, "localname": "RestrictedNetAssetsAbstract", "nsuri": "http://www.sunlands.com/20211231", "xbrltype": "stringItemType" }, "stg_SaleOrPurchaseOfAssetsOrRightsMinimumAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sale or purchase of assets or rights minimum amount.", "label": "Sale Or Purchase Of Assets Or Rights Minimum Amount", "terseLabel": "Sale or purchase of assets or rights minimum amount" } } }, "localname": "SaleOrPurchaseOfAssetsOrRightsMinimumAmount", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of estimated useful lives of property plant and equipment table text block.", "label": "Schedule Of Estimated Useful Lives Of Property Plant And Equipment Table [Text Block]", "terseLabel": "Summary of Estimated Useful Lives of Property and Equipment" } } }, "localname": "ScheduleOfEstimatedUsefulLivesOfPropertyPlantAndEquipmentTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesTables" ], "xbrltype": "textBlockItemType" }, "stg_ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of prepaid expenses and other current assets.", "label": "Schedule Of Prepaid Expenses And Other Current Assets Table [Text Block]", "terseLabel": "Summary of Prepaid Expenses and Other Current Assets" } } }, "localname": "ScheduleOfPrepaidExpensesAndOtherCurrentAssetsTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsTables" ], "xbrltype": "textBlockItemType" }, "stg_ScheduleOfSubsidiariesVariableInterestEntitiesVIEsAndVIEsSubsidiariesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of subsidiaries, Variable interest entities (\"VIEs\") and VIEs subsidiaries.", "label": "Schedule Of Subsidiaries Variable Interest Entities V I Es And V I Es Subsidiaries [Line Items]", "terseLabel": "Schedule of Subsidiaries, Variable Interest Entities (VIEs) and VIEs Subsidiaries [Line Items]" } } }, "localname": "ScheduleOfSubsidiariesVariableInterestEntitiesVIEsAndVIEsSubsidiariesLineItems", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "stringItemType" }, "stg_ScheduleOfSubsidiariesVariableInterestEntitiesVIEsAndVIEsSubsidiariesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of subsidiaries, Variable interest entities (\"VIEs\") and VIEs subsidiaries.", "label": "Schedule Of Subsidiaries Variable Interest Entities V I Es And V I Es Subsidiaries [Table]", "terseLabel": "Schedule Of Subsidiaries Variable Interest Entities V I Es And V I Es Subsidiaries [Table]" } } }, "localname": "ScheduleOfSubsidiariesVariableInterestEntitiesVIEsAndVIEsSubsidiariesTable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "stringItemType" }, "stg_ScheduleOfVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of variable interest entities and variable Interest entities' subsidiaries.", "label": "Schedule Of Variable Interest Entities And Variable Interest Entities Subsidiaries Table [Text Block]", "terseLabel": "Summary Financial Information of VIEs and their Subsidiaries" } } }, "localname": "ScheduleOfVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesTables" ], "xbrltype": "textBlockItemType" }, "stg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodIntrinsicValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Share-based compensation arrangement by share-based payment award options forfeited in period intrinsic value.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Forfeited In Period Intrinsic Value", "negatedLabel": "Aggregated intrinsic value, Forfeited" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodIntrinsicValue", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "stg_ShortTermInvestmentsPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Short-term investments.", "label": "Short Term Investments Policy [Text Block]", "terseLabel": "Short-term investments" } } }, "localname": "ShortTermInvestmentsPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_SignificantAccountingPoliciesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Significant accounting policies.", "label": "Significant Accounting Policies [Line Items]", "terseLabel": "Significant Accounting Policies [Line Items]" } } }, "localname": "SignificantAccountingPoliciesLineItems", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_SignificantAccountingPoliciesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Significant accounting policies.", "label": "Significant Accounting Policies [Table]", "terseLabel": "Significant Accounting Policies [Table]" } } }, "localname": "SignificantAccountingPoliciesTable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "stg_SignificantRisksAndUncertaintiesPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Significant risks and uncertainties.", "label": "Significant Risks And Uncertainties Policy [Text Block]", "terseLabel": "Significant Risks and Uncertainties" } } }, "localname": "SignificantRisksAndUncertaintiesPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_SubsidiariesAndVariableInterestEntitiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Subsidiaries and variable interest entities.", "label": "Subsidiaries And Variable Interest Entities [Member]", "terseLabel": "subsidiaries and the Variable Interest Entities" } } }, "localname": "SubsidiariesAndVariableInterestEntitiesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_SummaryOfLandUseRightTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Summary of land use right.", "label": "Summary Of Land Use Right Table [Text Block]", "terseLabel": "Summary of Land Use Right" } } }, "localname": "SummaryOfLandUseRightTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetTables" ], "xbrltype": "textBlockItemType" }, "stg_SummaryOfSubsidiariesAndVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Summary of subsidiaries and variable interest entities and variable interest entities subsidiaries.", "label": "Summary Of Subsidiaries And Variable Interest Entities And Variable Interest Entities Subsidiaries Table [Text Block]", "terseLabel": "Summary of Major Subsidiaries VIEs and VIEs' Subsidiaries" } } }, "localname": "SummaryOfSubsidiariesAndVariableInterestEntitiesAndVariableInterestEntitiesSubsidiariesTableTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationTables" ], "xbrltype": "textBlockItemType" }, "stg_SunlandsOnlineEducationHKLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Sunlands Online Education HK Limited.", "label": "Sunlands Online Education H K Limited [Member]", "terseLabel": "Sunlands Online Education HK Limited (\"Sunlands HK\")" } } }, "localname": "SunlandsOnlineEducationHKLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_TermOfRepaymentOfPrincipalInstallmentsOnWhichInterestExpenseAndServiceFeesPayable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Term of repayment of principal installments on which interest expense and service fees payable.", "label": "Term Of Repayment Of Principal Installments On Which Interest Expense And Service Fees Payable", "terseLabel": "Term of repayment of principal installments on which interest expense and service fees payable" } } }, "localname": "TermOfRepaymentOfPrincipalInstallmentsOnWhichInterestExpenseAndServiceFeesPayable", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "stg_ThresholdPercentageOfStatutoryCommonReserveNeedToBeMadeOverEntitiesRegisteredCapital": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Threshold percentage of statutory common reserve need to be made over entities registered capital.", "label": "Threshold Percentage Of Statutory Common Reserve Need To Be Made Over Entities Registered Capital", "terseLabel": "Threshold percentage of statutory common reserve of the registered capital, used as criteria of allocation requirement" } } }, "localname": "ThresholdPercentageOfStatutoryCommonReserveNeedToBeMadeOverEntitiesRegisteredCapital", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_TianjinAlamanEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tianjin Alaman Education Technology Company Limited.", "label": "Tianjin Alaman Education Technology Company Limited [Member]", "terseLabel": "Tianjin Alaman Education Technology Co., Ltd. (\"Tianjin Alaman\")" } } }, "localname": "TianjinAlamanEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_TianjinShangdeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tianjin Shangde.", "label": "Tianjin Shangde [Member]", "terseLabel": "Tianjin Shangde Online Education Technology Co., Ltd. (\"Tianjin Shangde\")" } } }, "localname": "TianjinShangdeMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_TimeForFullRefundOfTransactionPrice": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Time for full refund of transaction price.", "label": "Time For Full Refund Of Transaction Price", "terseLabel": "Time for full refund of transaction price" } } }, "localname": "TimeForFullRefundOfTransactionPrice", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "stg_TimeForRefundOfTransactionPriceToUndeliveredCourses": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Time for refund of transaction price to undelivered courses.", "label": "Time For Refund Of Transaction Price To Undelivered Courses", "terseLabel": "Time for refund of transaction price to undelivered courses" } } }, "localname": "TimeForRefundOfTransactionPriceToUndeliveredCourses", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "stg_TransferredToDesignatedAgentAccountForShareRepurchase": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Transferred to designated agent account for share repurchase.", "label": "Transferred To Designated Agent Account For Share Repurchase", "terseLabel": "Transferred to designated agent account for share repurchase" } } }, "localname": "TransferredToDesignatedAgentAccountForShareRepurchase", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "stg_TwoEmployeesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Two employees.", "label": "Two Employees [Member]", "terseLabel": "Two Employees" } } }, "localname": "TwoEmployeesMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_TwoThousandAndSeventeenShareIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Two thousand and seventeen share incentive plan.", "label": "Two Thousand And Seventeen Share Incentive Plan [Member]", "terseLabel": "2017 Share Incentive Plan" } } }, "localname": "TwoThousandAndSeventeenShareIncentivePlanMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_ValueAddedTaxRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Value added tax rate.", "label": "Value Added Tax Rate", "terseLabel": "Rate of VAT" } } }, "localname": "ValueAddedTaxRate", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "stg_ValueAddedTaxesPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Value added taxes.", "label": "Value Added Taxes Policy [Text Block]", "terseLabel": "Value added taxes (\"VAT\")" } } }, "localname": "ValueAddedTaxesPolicyTextBlock", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "stg_VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInFinancingActivities": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Variable interest entity, measure of activity net cash generated from (used in) financing activities.", "label": "Variable Interest Entity Measure Of Activity Net Cash Generated From Used In Financing Activities", "terseLabel": "Net cash generated from financing activities" } } }, "localname": "VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInFinancingActivities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "monetaryItemType" }, "stg_VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInInvestingActivities": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Variable interest entity, measure of activity net cash generated from (used in) investing activities.", "label": "Variable Interest Entity Measure Of Activity Net Cash Generated From Used In Investing Activities", "terseLabel": "Net cash generated from/(used in) investing activities" } } }, "localname": "VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInInvestingActivities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "monetaryItemType" }, "stg_VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInOperatingActivities": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Variable interest entity, measure of activity net cash generated from (used in) operating activities.", "label": "Variable Interest Entity Measure Of Activity Net Cash Generated From Used In Operating Activities", "terseLabel": "Net cash used in operating activities" } } }, "localname": "VariableInterestEntityMeasureOfActivityNetCashGeneratedFromUsedInOperatingActivities", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "monetaryItemType" }, "stg_VariableRateFinancialInstruments": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails": { "order": 10020.0, "parentTag": "us-gaap_ShortTermInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Variable rate financial instruments", "label": "Variable Rate Financial Instruments", "terseLabel": "Variable-rate financial instruments" } } }, "localname": "VariableRateFinancialInstruments", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails" ], "xbrltype": "monetaryItemType" }, "stg_VariableRateFinancialInstrumentsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Variable-rate financial instruments.", "label": "Variable Rate Financial Instruments [Member]", "terseLabel": "Variable-Rate Financial Instruments" } } }, "localname": "VariableRateFinancialInstrumentsMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "stg_WeightedAverageServicePeriod": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Weighted average service period.", "label": "Weighted Average Service Period", "terseLabel": "Weighted average service period" } } }, "localname": "WeightedAverageServicePeriod", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "stg_WhollyForeignOwnedEnterpriseMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wholly foreign-owned enterprise.", "label": "Wholly Foreign Owned Enterprise [Member]", "verboseLabel": "WFOE" } } }, "localname": "WhollyForeignOwnedEnterpriseMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_WuhanHubeiMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wuhan, Hubei.", "label": "Wuhan Hubei [Member]", "terseLabel": "Wuhan, Hubei" } } }, "localname": "WuhanHubeiMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "stg_WuhanJiayanOnlineEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wuhan Jiayan Online Education Technology Company Limited.", "label": "Wuhan Jiayan Online Education Technology Company Limited [Member]", "terseLabel": "Wuhan Jiayan Online Education Technology Co., Ltd. (\"Wuhan Jiayan\")" } } }, "localname": "WuhanJiayanOnlineEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_WuhanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wuhan.", "label": "Wuhan [Member]", "terseLabel": "Wuhan" } } }, "localname": "WuhanMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "domainItemType" }, "stg_WuhanShangdeOnlineEducationTechnologyCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wuhan Shangde Online Education Technology Company Limited.", "label": "Wuhan Shangde Online Education Technology Company Limited [Member]", "terseLabel": "Wuhan Shangde Online Education Technology Co., Ltd. (\"Wuhan Shangde\")" } } }, "localname": "WuhanShangdeOnlineEducationTechnologyCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "stg_WuhanStudyvipOnlineEducationCompanyLimitedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Wuhan Studyvip Online Education Company Limited.", "label": "Wuhan Studyvip Online Education Company Limited [Member]", "terseLabel": "Wuhan Studyvip Online Education Co., Ltd. (\"Wuhan Zhibo\")" } } }, "localname": "WuhanStudyvipOnlineEducationCompanyLimitedMember", "nsuri": "http://www.sunlands.com/20211231", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountingStandardsUpdate201811Member": { "auth_ref": [ "r553" ], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2018-11 Leases (Topic 842): Targeted Improvements.", "label": "Accounting Standards Update201811 [Member]", "terseLabel": "ASU 2018-11" } } }, "localname": "AccountingStandardsUpdate201811Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock": { "auth_ref": [ "r54" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period.", "label": "Accounts Payable And Accrued Liabilities Disclosure [Text Block]", "terseLabel": "Accrued Expenses and Other Current Liabilities" } } }, "localname": "AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities" ], "xbrltype": "textBlockItemType" }, "us-gaap_AccountsPayableOtherCurrent": { "auth_ref": [ "r18", "r53" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10090.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligations incurred classified as other, payable within one year or the normal operating cycle, if longer.", "label": "Accounts Payable Other Current", "terseLabel": "Other payables" } } }, "localname": "AccountsPayableOtherCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent": { "auth_ref": [ "r18", "r58", "r422" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10060.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred and payable for real and property taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrual For Taxes Other Than Income Taxes Current", "terseLabel": "Other tax liabilities" } } }, "localname": "AccrualForTaxesOtherThanIncomeTaxesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedLiabilitiesCurrent": { "auth_ref": [ "r58" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10200.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of 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. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrued Liabilities Current", "positiveVerboseLabel": "Accrued expenses and other current liabilities", "terseLabel": "Accrued expenses and other current liabilities (including accrued expenses and other current liabilities of the consolidated VIEs without recourse to Sunlands Technology Group of RMB175,900 and RMB197,467 as of December 31, 2020 and 2021, respectively)", "totalLabel": "Total", "verboseLabel": "Accrued expenses and other current liabilities" } } }, "localname": "AccruedLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedMarketingCostsCurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10030.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred through that date and payable for the marketing, trade and selling of the entity's goods and services. Marketing costs would include expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services; costs of public relations and corporate promotions; and obligations incurred and payable for sales discounts, rebates, price protection programs, etc. offered to customers and under government programs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrued Marketing Costs Current", "terseLabel": "Accrued marketing expenses" } } }, "localname": "AccruedMarketingCostsCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedProfessionalFeesCurrent": { "auth_ref": [ "r17", "r18", "r58" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10070.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Accrued Professional Fees Current", "terseLabel": "Accrued service fees" } } }, "localname": "AccruedProfessionalFeesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r51", "r266" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails": { "order": 10020.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.", "label": "Accumulated Depreciation Depletion And Amortization Property Plant And Equipment", "negatedLabel": "Less: Accumulated depreciation" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r41", "r76", "r77", "r78", "r650", "r681", "r685" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10070.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10110.0, "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", "terseLabel": "Accumulated other comprehensive income" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r75", "r78", "r85", "r86", "r87", "r142", "r143", "r144", "r477", "r676", "r677", "r746" ], "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": "Accumulated Other Comprehensive Income [Member]", "terseLabel": "Accumulated Other Comprehensive income/(loss)" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionalPaidInCapitalCommonStock": { "auth_ref": [ "r39" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10060.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10100.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.", "label": "Additional Paid In Capital Common Stock", "terseLabel": "Additional paid-in capital" } } }, "localname": "AdditionalPaidInCapitalCommonStock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdditionalPaidInCapitalMember": { "auth_ref": [ "r142", "r143", "r144", "r414", "r415", "r416", "r507" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": { "auth_ref": [ "r0", "r1", "r2", "r3", "r4", "r146", "r147", "r148", "r149", "r157", "r213", "r214", "r232", "r233", "r234", "r235", "r236", "r237", "r282", "r410", "r411", "r412", "r413", "r414", "r415", "r416", "r417", "r447", "r448", "r449", "r450", "r499", "r500", "r501", "r502", "r503", "r504", "r505", "r506", "r507", "r508", "r509", "r524", "r525", "r527", "r528", "r529", "r530", "r531", "r532", "r569", "r617", "r618", "r619", "r674", "r675", "r676", "r677", "r678", "r679", "r680", "r681", "r682", "r683", "r684", "r685", "r742", "r743", "r744", "r745", "r746" ], "lang": { "en-us": { "role": { "documentation": "Information by amendment to accounting standards.", "label": "Adjustments For New Accounting Pronouncements [Axis]", "terseLabel": "Accounting Standards Update" } } }, "localname": "AdjustmentsForNewAccountingPronouncementsAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": { "auth_ref": [ "r389", "r391", "r419", "r420" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement.", "label": "Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value", "terseLabel": "Share-based compensation" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]", "terseLabel": "Adjustments to reconcile net loss to net cash generated from operating activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_AdvertisingCostsPolicyTextBlock": { "auth_ref": [ "r423" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for advertising cost.", "label": "Advertising Costs Policy [Text Block]", "terseLabel": "Advertising expenditure" } } }, "localname": "AdvertisingCostsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_AdvertisingExpense": { "auth_ref": [ "r424" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.", "label": "Advertising Expense", "terseLabel": "Advertising expenses" } } }, "localname": "AdvertisingExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllocatedShareBasedCompensationExpense": { "auth_ref": [ "r391", "r407", "r418" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.", "label": "Allocated Share Based Compensation Expense", "terseLabel": "Allocated Share-based Compensation Expense", "verboseLabel": "Compensation expense" } } }, "localname": "AllocatedShareBasedCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmortizationOfIntangibleAssets": { "auth_ref": [ "r121", "r253", "r258" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Amortization Of Intangible Assets", "terseLabel": "Amortization expenses" } } }, "localname": "AmortizationOfIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries": { "auth_ref": [ "r135" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.", "label": "Amount Of Restricted Net Assets For Consolidated And Unconsolidated Subsidiaries", "terseLabel": "Amount of restricted paid-in-capital and statutory reserves" } } }, "localname": "AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssetsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r165" ], "lang": { "en-us": { "role": { "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.", "label": "Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount", "terseLabel": "Antidilutive securities excluded from computation of earnings per share" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis": { "auth_ref": [ "r165" ], "lang": { "en-us": { "role": { "documentation": "Information by type of antidilutive security.", "label": "Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]", "terseLabel": "Antidilutive Securities" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems": { "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": "Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]", "terseLabel": "Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AntidilutiveSecuritiesNameDomain": { "auth_ref": [ "r165" ], "lang": { "en-us": { "role": { "documentation": "Incremental common shares attributable to securities that were not included in diluted earnings per share (EPS) because to do so would increase EPS amounts or decrease loss per share amounts for the period presented.", "label": "Antidilutive Securities Name [Domain]", "terseLabel": "Antidilutive Securities, Name" } } }, "localname": "AntidilutiveSecuritiesNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AreaOfLand": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Area of land held.", "label": "Area Of Land", "terseLabel": "Area of land" } } }, "localname": "AreaOfLand", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLandUseRightNetAdditionalInformationDetails" ], "xbrltype": "areaItemType" }, "us-gaap_AssetPledgedAsCollateralMember": { "auth_ref": [ "r469", "r479", "r592" ], "lang": { "en-us": { "role": { "documentation": "Asset pledged as collateral.", "label": "Asset Pledged As Collateral [Member]", "terseLabel": "Assets Pledged as Collateral" } } }, "localname": "AssetPledgedAsCollateralMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Assets": { "auth_ref": [ "r137", "r189", "r195", "r201", "r227", "r283", "r284", "r285", "r286", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r469", "r479", "r523", "r574", "r576", "r625", "r649" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "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": "Consolidated VIE assets", "totalLabel": "TOTAL ASSETS" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets [Abstract]", "terseLabel": "ASSETS" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsCurrent": { "auth_ref": [ "r14", "r16", "r73", "r137", "r227", "r283", "r284", "r285", "r286", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r469", "r479", "r523", "r574", "r576" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10120.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10250.0, "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 assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets Current", "totalLabel": "Total current assets" } } }, "localname": "AssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsCurrentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets Current [Abstract]", "terseLabel": "Current assets" } } }, "localname": "AssetsCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsNoncurrent": { "auth_ref": [ "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r137", "r227", "r283", "r284", "r285", "r286", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r469", "r479", "r523", "r574" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10260.0, "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 assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.", "label": "Assets Noncurrent", "totalLabel": "Total non-current assets" } } }, "localname": "AssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsNoncurrentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets Noncurrent [Abstract]", "terseLabel": "Non-current assets" } } }, "localname": "AssetsNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r392", "r409" ], "lang": { "en-us": { "role": { "documentation": "Information by type of award under share-based payment arrangement.", "label": "Award Type [Axis]", "terseLabel": "Award Type" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BuildingMember": { "auth_ref": [ "r265" ], "lang": { "en-us": { "role": { "documentation": "Facility held for productive use including, but not limited to, office, production, storage and distribution facilities.", "label": "Building [Member]", "terseLabel": "Building" } } }, "localname": "BuildingMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionLineItems": { "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": "Business Acquisition [Line Items]", "terseLabel": "Business Acquisition [Line Items]" } } }, "localname": "BusinessAcquisitionLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r10", "r47", "r123" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10140.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10350.0, "parentTag": "us-gaap_AssetsCurrent", "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" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPolicyTextBlock": { "auth_ref": [ "r22", "r124" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.", "label": "Cash And Cash Equivalents Policy [Text Block]", "terseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy": { "auth_ref": [ "r22", "r124", "r623" ], "lang": { "en-us": { "role": { "documentation": "Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.", "label": "Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy", "terseLabel": "Restricted cash" } } }, "localname": "CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": { "auth_ref": [ "r116", "r123", "r129" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, 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 Including Disposal Group And Discontinued Operations", "periodEndLabel": "Cash and cash equivalents at end of the year", "periodStartLabel": "Cash and cash equivalents at beginning of the year" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": { "auth_ref": [ "r116", "r533" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "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": "Net increase/(decrease) in cash and cash equivalents" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract]", "terseLabel": "Supplemental schedule of non-cash investing activities:" } } }, "localname": "CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted": { "auth_ref": [ "r0", "r1", "r142", "r143", "r145", "r213", "r214", "r229", "r230", "r231", "r232", "r233", "r282", "r410", "r411", "r412", "r447", "r497", "r499", "r500", "r524", "r526", "r527", "r528", "r531", "r532", "r554", "r569", "r617", "r618", "r674", "r675", "r742" ], "lang": { "en-us": { "role": { "documentation": "Indicates (true false) whether accounting standards update was adopted.", "label": "Change In Accounting Principle Accounting Standards Update Adopted", "terseLabel": "Change In accounting principle accounting standards update adopted" } } }, "localname": "ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "booleanItemType" }, "us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate": { "auth_ref": [ "r0", "r1", "r142", "r143", "r152", "r213", "r214", "r229", "r230", "r231", "r232", "r233", "r282", "r410", "r411", "r412", "r447", "r497", "r499", "r500", "r501", "r504", "r524", "r526", "r527", "r528", "r531", "r532", "r554", "r569", "r617", "r618", "r674", "r675", "r742" ], "lang": { "en-us": { "role": { "documentation": "Date accounting standards update was adopted, in YYYY-MM-DD format.", "label": "Change In Accounting Principle Accounting Standards Update Adoption Date", "terseLabel": "Change in accounting principle accounting standards update adoption date" } } }, "localname": "ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "dateItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [ "r134", "r137", "r158", "r159", "r160", "r162", "r164", "r170", "r171", "r172", "r227", "r283", "r287", "r288", "r289", "r292", "r293", "r320", "r321", "r324", "r325", "r523", "r731" ], "lang": { "en-us": { "role": { "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.", "label": "Class Of Stock [Domain]", "terseLabel": "Class of Stock" } } }, "localname": "ClassOfStockDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_ClassOfStockLineItems": { "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": "Class Of Stock [Line Items]", "terseLabel": "Ordinary Shares [Line Items]" } } }, "localname": "ClassOfStockLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.", "label": "Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right", "terseLabel": "Class of each ordinary shares convertible into class A ordinary shares" } } }, "localname": "ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_CommissionsExpensePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for commissions incurred in relation to revenue generating activities or operations.", "label": "Commissions Expense Policy Policy [Text Block]", "terseLabel": "Sales commission" } } }, "localname": "CommissionsExpensePolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r63", "r278", "r631", "r655" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10020.0, "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": "COMMITMENTS AND CONTINGENCIES (Note 20)" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Commitments And Contingencies Disclosure [Abstract]" } } }, "localname": "CommitmentsAndContingenciesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r275", "r276", "r277", "r280", "r706" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for commitments and contingencies.", "label": "Commitments And Contingencies Disclosure [Text Block]", "terseLabel": "Commitments and Contingencies" } } }, "localname": "CommitmentsAndContingenciesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentsAndContingencies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommonClassAMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Classification of common stock representing ownership interest in a corporation.", "label": "Common Class A [Member]", "terseLabel": "Class A Ordinary Shares" } } }, "localname": "CommonClassAMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_CommonClassBMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Classification of common stock that has different rights than Common Class A, representing ownership interest in a corporation.", "label": "Common Class B [Member]", "terseLabel": "Class B Ordinary Shares" } } }, "localname": "CommonClassBMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_CommonClassCMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Classification of common stock that has different rights than provided to Class A or B shares, representing ownership interest in a corporation.", "label": "Common Class C [Member]", "terseLabel": "Class C Ordinary Shares" } } }, "localname": "CommonClassCMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockCapitalSharesReservedForFutureIssuance": { "auth_ref": [ "r65" ], "lang": { "en-us": { "role": { "documentation": "Aggregate number of common shares reserved for future issuance.", "label": "Common Stock Capital Shares Reserved For Future Issuance", "terseLabel": "Common Stock, Capital Shares Reserved for Future Issuance" } } }, "localname": "CommonStockCapitalSharesReservedForFutureIssuance", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [ "r142", "r143", "r507" ], "lang": { "en-us": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]", "terseLabel": "Additional Ordinary Share", "verboseLabel": "Ordinary Shares" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r38" ], "lang": { "en-us": { "role": { "documentation": "Face amount or stated value per share of common stock.", "label": "Common Stock Par Or Stated Value Per Share", "terseLabel": "Ordinary shares, par value" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r38" ], "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", "terseLabel": "Ordinary shares, shares authorized" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r38" ], "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", "terseLabel": "Ordinary shares, shares issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r38", "r327" ], "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", "periodEndLabel": "Balances (in shares)", "periodStartLabel": "Balances (in shares)", "terseLabel": "Ordinary shares, shares outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r38", "r576" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10020.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10060.0, "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", "terseLabel": "Ordinary shares" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonStockVotingRights": { "auth_ref": [ "r328" ], "lang": { "en-us": { "role": { "documentation": "Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.", "label": "Common Stock Voting Rights", "terseLabel": "Common stock, voting right" } } }, "localname": "CommonStockVotingRights", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock": { "auth_ref": [ "r373", "r374", "r388" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure of an entity's employee compensation and benefit plans, excluding share-based compensation and including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, life insurance, severance, health care, unemployment and other benefit plans.", "label": "Compensation And Employee Benefit Plans Other Than Share Based Compensation [Text Block]", "terseLabel": "Employee Defined Contribution Plan" } } }, "localname": "CompensationAndEmployeeBenefitPlansOtherThanShareBasedCompensationTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureEmployeeDefinedContributionPlan" ], "xbrltype": "textBlockItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Compensation And Retirement Disclosure [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_CompensationRelatedCostsPolicyTextBlock": { "auth_ref": [ "r395" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for salaries, bonuses, incentive awards, postretirement and postemployment benefits granted to employees, including equity-based arrangements; discloses methodologies for measurement, and the bases for recognizing related assets and liabilities and recognizing and reporting compensation expense.", "label": "Compensation Related Costs Policy [Text Block]", "terseLabel": "Share-based compensation" } } }, "localname": "CompensationRelatedCostsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r80", "r82", "r83", "r95", "r638", "r660" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME": { "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 Net Of Tax", "totalLabel": "Comprehensive (loss)/income attributable to Sunlands Technology Group" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest": { "auth_ref": [ "r80", "r82", "r94", "r466", "r467", "r495", "r637", "r659" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME": { "order": 10020.0, "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 Net Of Tax Attributable To Noncontrolling Interest", "terseLabel": "Less: comprehensive loss attributable to noncontrolling interest" } } }, "localname": "ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r80", "r82", "r93", "r465", "r495", "r636", "r658" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME": { "order": 10010.0, "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 Net Of Tax Including Portion Attributable To Noncontrolling Interest", "totalLabel": "Total comprehensive (loss)/income" } } }, "localname": "ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for comprehensive income.", "label": "Comprehensive Income Policy Policy [Text Block]", "terseLabel": "Comprehensive loss/income" } } }, "localname": "ComprehensiveIncomePolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComputerSoftwareIntangibleAssetMember": { "auth_ref": [ "r254", "r256", "r461" ], "lang": { "en-us": { "role": { "documentation": "Collection of computer programs and related data that provide instructions to a computer, for example, but not limited to, application program, control module or operating system, that perform one or more particular functions or tasks.", "label": "Computer Software Intangible Asset [Member]", "terseLabel": "Computer Software" } } }, "localname": "ComputerSoftwareIntangibleAssetMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ConcentrationRiskBenchmarkDomain": { "auth_ref": [ "r174", "r175", "r209", "r521", "r522", "r705" ], "lang": { "en-us": { "role": { "documentation": "The denominator in a calculation of a disclosed concentration risk percentage.", "label": "Concentration Risk Benchmark [Domain]", "terseLabel": "Concentration Risk Benchmark" } } }, "localname": "ConcentrationRiskBenchmarkDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ConcentrationRiskByBenchmarkAxis": { "auth_ref": [ "r174", "r175", "r209", "r521", "r522", "r686", "r705" ], "lang": { "en-us": { "role": { "documentation": "Information by benchmark of concentration risk.", "label": "Concentration Risk By Benchmark [Axis]", "terseLabel": "Concentration Risk Benchmark" } } }, "localname": "ConcentrationRiskByBenchmarkAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ConcentrationRiskByTypeAxis": { "auth_ref": [ "r174", "r175", "r209", "r521", "r522", "r686", "r705" ], "lang": { "en-us": { "role": { "documentation": "Information by type of concentration risk, for example, but not limited to, asset, liability, net assets, geographic, customer, employees, supplier, lender.", "label": "Concentration Risk By Type [Axis]", "terseLabel": "Concentration Risk Type" } } }, "localname": "ConcentrationRiskByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ConcentrationRiskPercentage1": { "auth_ref": [ "r174", "r175", "r209", "r521", "r522" ], "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 Percentage1", "terseLabel": "Revenues from customers individually representing portion of total net revenues" } } }, "localname": "ConcentrationRiskPercentage1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_ConcentrationRiskTypeDomain": { "auth_ref": [ "r174", "r175", "r209", "r521", "r522", "r705" ], "lang": { "en-us": { "role": { "documentation": "For an entity that discloses a concentration risk as a percentage of some financial balance or benchmark, identifies the type (for example, asset, liability, net assets, geographic, customer, employees, supplier, lender) of the concentration.", "label": "Concentration Risk Type [Domain]", "terseLabel": "Concentration Risk Type" } } }, "localname": "ConcentrationRiskTypeDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock": { "auth_ref": [ "r5", "r140", "r462" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.", "label": "Condensed Financial Information Of Parent Company Only Disclosure [Text Block]", "terseLabel": "Condensed Financial Information of Parent Company" } } }, "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCondensedFinancialInformationOfParentCompany" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConsolidationPolicyTextBlock": { "auth_ref": [ "r131", "r471" ], "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 [Text Block]", "terseLabel": "Principles of consolidation" } } }, "localname": "ConsolidationPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConsolidationVariableInterestEntityPolicy": { "auth_ref": [ "r478", "r483", "r485" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for consolidation to describe the significant judgments and assumptions made in determining whether a variable interest held by the entity requires the variable interest entity to be consolidated and (or) disclose information about its involvement with the variable interest entity; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; and the significant factors considered and judgments made in determining that the power to direct the activities that significantly impact the economic performance of the variable interest entity are shared (as defined).", "label": "Consolidation Variable Interest Entity Policy", "terseLabel": "The VIE arrangements" } } }, "localname": "ConsolidationVariableInterestEntityPolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock": { "auth_ref": [ "r342" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.", "label": "Contract With Customer Asset And Liability Table [Text Block]", "terseLabel": "Schedule of Movements of the Deferred Revenue" } } }, "localname": "ContractWithCustomerAssetAndLiabilityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ContractWithCustomerLiability": { "auth_ref": [ "r340", "r341", "r362" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.", "label": "Contract With Customer Liability", "periodEndLabel": "Ending balance (current and noncurrent)", "periodStartLabel": "Beginning balance (current and noncurrent)", "verboseLabel": "Deferred revenue" } } }, "localname": "ContractWithCustomerLiability", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerLiabilityCurrent": { "auth_ref": [ "r340", "r341", "r362" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10210.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.", "label": "Contract With Customer Liability Current", "positiveLabel": "Deferred revenue, current", "terseLabel": "Deferred revenue, current (including deferred revenue, current of the consolidated VIEs without recourse to Sunlands Technology Group of RMB435,254 and RMB295,958 as of December 31, 2020 and 2021, respectively)" } } }, "localname": "ContractWithCustomerLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerLiabilityNoncurrent": { "auth_ref": [ "r340", "r341", "r362" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails": { "order": 10020.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10150.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.", "label": "Contract With Customer Liability Noncurrent", "positiveLabel": "Deferred revenue, non-current", "terseLabel": "Deferred revenue, non-current (including deferred revenue, non-current of the consolidated VIEs without recourse to Sunlands Technology Group of RMB468,577and RMB257,071 as of December 31, 2020 and 2021, respectively)" } } }, "localname": "ContractWithCustomerLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfMovementOfDeferredRevenueDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractWithCustomerRefundLiabilityCurrent": { "auth_ref": [ "r364" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10050.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer, classified as current.", "label": "Contract With Customer Refund Liability Current", "terseLabel": "Advanced deposits" } } }, "localname": "ContractWithCustomerRefundLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ContractualObligation": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.", "label": "Contractual Obligation", "terseLabel": "Investment commitment amount", "verboseLabel": "Investment committed amount but not yet paid" } } }, "localname": "ContractualObligation", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ConversionOfStockSharesConverted1": { "auth_ref": [ "r126", "r127", "r128" ], "lang": { "en-us": { "role": { "documentation": "The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. \"Part noncash\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.", "label": "Conversion Of Stock Shares Converted1", "terseLabel": "Conversion Class C Ordinary shares to Class A Ordinary shares (Note 14), shares", "verboseLabel": "Conversion of shares" } } }, "localname": "ConversionOfStockSharesConverted1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "sharesItemType" }, "us-gaap_CostOfRevenue": { "auth_ref": [ "r100", "r137", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r523" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10180.0, "parentTag": "us-gaap_GrossProfit", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate cost of goods produced and sold and services rendered during the reporting period.", "label": "Cost Of Revenue", "negatedLabel": "Cost of revenues (including share-based compensation expenses of RMB317,RMB146 and RMB101 for the years ended December 31, 2019, 2020 and 2021, respectively)", "negatedTerseLabel": "Cost of revenues" } } }, "localname": "CostOfRevenue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_CostOfSalesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing cost of sales.", "label": "Cost Of Sales [Member]", "terseLabel": "Cost of Revenues" } } }, "localname": "CostOfSalesMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_CustomerConcentrationRiskMember": { "auth_ref": [ "r173", "r209" ], "lang": { "en-us": { "role": { "documentation": "Reflects the percentage that revenues in the period from one or more significant customers is to net revenues, as defined by the entity, such as total net revenues, product line revenues, segment revenues. The risk is the materially adverse effects of loss of a significant customer.", "label": "Customer Concentration Risk [Member]", "terseLabel": "Customer Concentration Risk" } } }, "localname": "CustomerConcentrationRiskMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CustomerRefundLiabilityCurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10010.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment.", "label": "Customer Refund Liability Current", "terseLabel": "Refund liability" } } }, "localname": "CustomerRefundLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Debt Disclosure [Abstract]" } } }, "localname": "DebtDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentCollateralAmount": { "auth_ref": [ "r644" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of assets pledged to secure a debt instrument.", "label": "Debt Instrument Collateral Amount", "terseLabel": "Debt instrument, security deposit" } } }, "localname": "DebtInstrumentCollateralAmount", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentFaceAmount": { "auth_ref": [ "r294", "r312", "r313", "r545", "r547", "r548" ], "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", "verboseLabel": "Amount of loan obtained to purchase buildings" } } }, "localname": "DebtInstrumentFaceAmount", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentFrequencyOfPeriodicPayment": { "auth_ref": [ "r61", "r643" ], "lang": { "en-us": { "role": { "documentation": "Description of the frequency of periodic payments (monthly, quarterly, annual).", "label": "Debt Instrument Frequency Of Periodic Payment", "terseLabel": "Debt instrument periodic payment description" } } }, "localname": "DebtInstrumentFrequencyOfPeriodicPayment", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentInterestRateStatedPercentage": { "auth_ref": [ "r60", "r295" ], "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" } } }, "localname": "DebtInstrumentInterestRateStatedPercentage", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentLineItems": { "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 Instrument [Line Items]", "terseLabel": "Debt Instrument [Line Items]" } } }, "localname": "DebtInstrumentLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentTable": { "auth_ref": [ "r61", "r136", "r140", "r294", "r295", "r296", "r297", "r298", "r299", "r300", "r301", "r302", "r303", "r304", "r305", "r306", "r307", "r308", "r309", "r310", "r311", "r312", "r313", "r314", "r315", "r328", "r331", "r332", "r333", "r544", "r545", "r547", "r548", "r645" ], "lang": { "en-us": { "role": { "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Debt Instrument [Table]", "terseLabel": "Debt Instrument [Table]" } } }, "localname": "DebtInstrumentTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentTerm": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Debt Instrument Term", "terseLabel": "Debt instrument, term" } } }, "localname": "DebtInstrumentTerm", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "us-gaap_DeferredCosts": { "auth_ref": [ "r30", "r624", "r648" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails": { "order": 10020.0, "parentTag": "stg_DeferredSalesInducementsNetOfImpairment", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10310.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred cost, excluding capitalized cost related to contract with customer; classified as noncurrent.", "label": "Deferred Costs", "terseLabel": "Deferred costs, non-current" } } }, "localname": "DeferredCosts", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]" } } }, "localname": "DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_DeferredCostsCurrent": { "auth_ref": [ "r72" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails": { "order": 10010.0, "parentTag": "stg_DeferredSalesInducementsNetOfImpairment", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10390.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of deferred costs capitalized at the end of the reporting period that are expected to be charged against earnings within one year or the normal operating cycle, if longer.", "label": "Deferred Costs Current", "terseLabel": "Deferred costs, current" } } }, "localname": "DeferredCostsCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxAssetsNet": { "auth_ref": [ "r428", "r429" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10330.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.", "label": "Deferred Income Tax Assets Net", "terseLabel": "Deferred tax assets" } } }, "localname": "DeferredIncomeTaxAssetsNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxLiabilities": { "auth_ref": [ "r34", "r35", "r437", "r626", "r646" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.", "label": "Deferred Income Tax Liabilities", "negatedLabel": "Total deferred tax liabilities" } } }, "localname": "DeferredIncomeTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxLiabilitiesNet": { "auth_ref": [ "r428", "r429" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10170.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "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 tax liabilities (including deferred tax liabilities of the consolidated VIEs without recourse to Sunlands Technology Group of RMB3,203 and RMB2,312 as of December 31, 2020 and 2021, respectively)", "verboseLabel": "Deferred tax liabilities" } } }, "localname": "DeferredIncomeTaxLiabilitiesNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredRentReceivablesNetNoncurrent": { "auth_ref": [ "r69", "r549", "r568" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails": { "order": 10030.0, "parentTag": "us-gaap_OtherAssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of excess of rental income recognized over rental payment required by lease, classified as noncurrent.", "label": "Deferred Rent Receivables Net Noncurrent", "terseLabel": "Rental deposits" } } }, "localname": "DeferredRentReceivablesNetNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredSalesInducementCostImpairmentLoss": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of impairment loss for deferred sales inducement cost.", "label": "Deferred Sales Inducement Cost Impairment Loss", "terseLabel": "Accumulated impairments" } } }, "localname": "DeferredSalesInducementCostImpairmentLoss", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredSalesInducementsAdditions": { "auth_ref": [ "r665", "r666", "r679" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred sale inducement cost capitalized.", "label": "Deferred Sales Inducements Additions", "terseLabel": "Additions" } } }, "localname": "DeferredSalesInducementsAdditions", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredSalesInducementsAmortizationExpense": { "auth_ref": [ "r664", "r665", "r666", "r679" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization expense (reversal of expense) for deferred sales inducement cost.", "label": "Deferred Sales Inducements Amortization Expense", "negatedLabel": "Amortizations" } } }, "localname": "DeferredSalesInducementsAmortizationExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredSalesInducementsNet": { "auth_ref": [ "r664", "r665", "r667", "r679" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred sale inducement cost capitalized on contract remaining in force.", "label": "Deferred Sales Inducements Net", "periodStartLabel": "Beginning balances (current and non-current)" } } }, "localname": "DeferredSalesInducementsNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDeferredCostsScheduleOfMovementsOfDeferredCostsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGross": { "auth_ref": [ "r438" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": 10010.0, "parentTag": "us-gaap_DeferredTaxAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred Tax Assets Gross", "totalLabel": "Total deferred tax assets" } } }, "localname": "DeferredTaxAssetsGross", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNet": { "auth_ref": [ "r440" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred Tax Assets Net", "totalLabel": "Deferred tax assets, net" } } }, "localname": "DeferredTaxAssetsNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Tax Assets Net [Abstract]", "terseLabel": "Deferred tax assets" } } }, "localname": "DeferredTaxAssetsNetAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredTaxAssetsOperatingLossCarryforwards": { "auth_ref": [ "r444", "r445" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": 10050.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.", "label": "Deferred Tax Assets Operating Loss Carryforwards", "terseLabel": "Net operating loss carry-forwards" } } }, "localname": "DeferredTaxAssetsOperatingLossCarryforwards", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities": { "auth_ref": [ "r444", "r445" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": 10030.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.", "label": "Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities", "terseLabel": "Accrued expenses" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r439" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails": { "order": 10020.0, "parentTag": "us-gaap_DeferredTaxAssetsNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.", "label": "Deferred Tax Assets Valuation Allowance", "negatedLabel": "Less: valuation allowance" } } }, "localname": "DeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesDeferredExpense": { "auth_ref": [ "r444", "r445" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs.", "label": "Deferred Tax Liabilities Deferred Expense", "negatedLabel": "Deferred costs" } } }, "localname": "DeferredTaxLiabilitiesDeferredExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesNetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Tax Liabilities Net [Abstract]", "terseLabel": "Deferred tax liabilities" } } }, "localname": "DeferredTaxLiabilitiesNetAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfDeferredIncomeTaxDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedContributionPlanCostRecognized": { "auth_ref": [ "r384" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost for defined contribution plan.", "label": "Defined Contribution Plan Cost Recognized", "terseLabel": "Amounts expensed as incurred for employee defined contribution plan" } } }, "localname": "DefinedContributionPlanCostRecognized", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureEmployeeDefinedContributionPlanAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Depreciation": { "auth_ref": [ "r121", "r264" ], "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 expenses" } } }, "localname": "Depreciation", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepreciationDepletionAndAmortization": { "auth_ref": [ "r121", "r184" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10230.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.", "label": "Depreciation Depletion And Amortization", "terseLabel": "Depreciation and amortization" } } }, "localname": "DepreciationDepletionAndAmortization", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_DisaggregationOfRevenueAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Disaggregation Of Revenue [Abstract]" } } }, "localname": "DisaggregationOfRevenueAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTable": { "auth_ref": [ "r361", "r365", "r366", "r367", "r368", "r369", "r370", "r371" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DisaggregationOfRevenueTableTextBlock": { "auth_ref": [ "r361" ], "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": "Schedule of Disaggregation of Revenue" } } }, "localname": "DisaggregationOfRevenueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": { "auth_ref": [ "r421" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for share-based payment arrangement.", "label": "Disclosure Of Compensation Related Costs Share Based Payments [Text Block]", "terseLabel": "Share Incentive Plan" } } }, "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlan" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]" } } }, "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Discontinued Operations And Disposal Groups [Abstract]" } } }, "localname": "DiscontinuedOperationsAndDisposalGroupsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock": { "auth_ref": [ "r8", "r271" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.", "label": "Disposal Groups Including Discontinued Operations Disclosure [Text Block]", "terseLabel": "Disposal of Subsidiaries" } } }, "localname": "DisposalGroupsIncludingDiscontinuedOperationsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiaries" ], "xbrltype": "textBlockItemType" }, "us-gaap_DueFromAffiliateCurrent": { "auth_ref": [ "r68", "r570", "r571", "r573" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10160.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).", "label": "Due From Affiliate Current", "terseLabel": "Amounts due from subsidiaries" } } }, "localname": "DueFromAffiliateCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DueFromEmployeesCurrent": { "auth_ref": [ "r68", "r570", "r571" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10070.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amounts due from an Entity employee, not to include stockholders or officers, which are usually due within 1 year (or 1 business cycle).", "label": "Due From Employees Current", "terseLabel": "Staff advances" } } }, "localname": "DueFromEmployeesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings Per Share [Abstract]" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasicAndDiluted": { "auth_ref": [ "r163" ], "lang": { "en-us": { "role": { "documentation": "The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Earnings Per Share Basic And Diluted", "terseLabel": "Basic and diluted", "verboseLabel": "Basic and diluted" } } }, "localname": "EarningsPerShareBasicAndDiluted", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareBasicAndDilutedAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings Per Share Basic And Diluted [Abstract]", "terseLabel": "Net (loss)/income per share attributable to ordinary shareholders of Sunlands Technology Group:" } } }, "localname": "EarningsPerShareBasicAndDilutedAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r165", "r166" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.", "label": "Earnings Per Share Policy [Text Block]", "terseLabel": "Net loss/income per share" } } }, "localname": "EarningsPerSharePolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r165", "r166", "r167", "r168" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Net (Loss) / Income Per Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations": { "auth_ref": [ "r533" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10040.0, "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; including, but not limited to, 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": "Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations", "terseLabel": "Effect of exchange rate changes" } } }, "localname": "EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r138", "r431", "r453" ], "lang": { "en-us": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate", "terseLabel": "Statutory income tax rate" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsParentheticalDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential": { "auth_ref": [ "r431", "r453" ], "lang": { "en-us": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.", "label": "Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential", "terseLabel": "Income tax rate outside the PRC" } } }, "localname": "EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeRelatedLiabilitiesCurrent": { "auth_ref": [ "r58" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails": { "order": 10020.0, "parentTag": "us-gaap_AccruedLiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).", "label": "Employee Related Liabilities Current", "terseLabel": "Salary and welfare payables" } } }, "localname": "EmployeeRelatedLiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesSummaryOfAccruedExpensesAndOtherLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems": { "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": "Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]", "terseLabel": "Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]" } } }, "localname": "EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions": { "auth_ref": [ "r408" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost to be recognized for option under share-based payment arrangement.", "label": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options", "terseLabel": "Unrecognized share-based compensation expenses" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeStockOptionMember": { "auth_ref": [ "r405" ], "lang": { "en-us": { "role": { "documentation": "Share-based payment arrangement granting right, subject to vesting and other restrictions, to purchase or sell certain number of shares at predetermined price for specified period of time.", "label": "Employee Stock Option [Member]", "terseLabel": "Employee Stock Option" } } }, "localname": "EmployeeStockOptionMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equity [Abstract]" } } }, "localname": "EquityAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r2", "r85", "r86", "r87", "r142", "r143", "r144", "r147", "r154", "r156", "r169", "r235", "r327", "r334", "r414", "r415", "r416", "r449", "r450", "r507", "r534", "r535", "r536", "r537", "r538", "r539", "r676", "r677", "r678", "r746" ], "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" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Equity Method Investments And Joint Ventures [Abstract]" } } }, "localname": "EquityMethodInvestmentsAndJointVenturesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_EquityMethodInvestmentsDisclosureTextBlock": { "auth_ref": [ "r228" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.", "label": "Equity Method Investments Disclosure [Text Block]", "terseLabel": "Long-Term Investments" } } }, "localname": "EquityMethodInvestmentsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestments" ], "xbrltype": "textBlockItemType" }, "us-gaap_EquityMethodInvestmentsPolicy": { "auth_ref": [ "r48", "r115", "r225", "r523" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for equity method of accounting for investments and other interests. Investment includes, but is not limited to, unconsolidated subsidiary, corporate joint venture, noncontrolling interest in real estate venture, limited partnership, and limited liability company. Information includes, but is not limited to, ownership percentage, reason equity method is or is not considered appropriate, and accounting policy election for distribution received.", "label": "Equity Method Investments Policy", "terseLabel": "Long-term investments" } } }, "localname": "EquityMethodInvestmentsPolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ExciseAndSalesTaxes": { "auth_ref": [ "r89" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails": { "order": 10020.0, "parentTag": "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services.", "label": "Excise And Sales Taxes", "negatedLabel": "Less: sales tax and surcharges" } } }, "localname": "ExciseAndSalesTaxes", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r510", "r511", "r512", "r517" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": { "auth_ref": [ "r510", "r511", "r512", "r516", "r517" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Table [Text Block]", "terseLabel": "Schedule of Asset Measured at Fair Value on Recurring Basis" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r303", "r312", "r313", "r376", "r377", "r378", "r379", "r380", "r381", "r382", "r383", "r511", "r581", "r582", "r583" ], "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 By Fair Value Hierarchy Level [Axis]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByMeasurementFrequencyAxis": { "auth_ref": [ "r510", "r511", "r513", "r514", "r518" ], "lang": { "en-us": { "role": { "documentation": "Information by measurement frequency.", "label": "Fair Value By Measurement Frequency [Axis]", "terseLabel": "Measurement Frequency" } } }, "localname": "FairValueByMeasurementFrequencyAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value Disclosures [Abstract]" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r515" ], "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]", "terseLabel": "Fair Value Measurement" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurement" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r303", "r376", "r377", "r382", "r383", "r511", "r581" ], "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 Level1 [Member]", "terseLabel": "Quoted Prices in Active Market for Identical Assets (Level 1)" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r303", "r312", "r313", "r376", "r377", "r382", "r383", "r511", "r582" ], "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 Level2 [Member]", "terseLabel": "Significant Other Observable Inputs (Level 2)" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r303", "r312", "r313", "r376", "r377", "r378", "r379", "r380", "r381", "r382", "r383", "r511", "r583" ], "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 Level3 [Member]", "terseLabel": "Significant Unobservable Inputs (Level 3)" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementFrequencyDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Measurement frequency.", "label": "Fair Value Measurement Frequency [Domain]", "terseLabel": "Measurement Frequency" } } }, "localname": "FairValueMeasurementFrequencyDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.", "label": "Fair Value Measurement Policy Policy [Text Block]", "terseLabel": "Fair value" } } }, "localname": "FairValueMeasurementPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [ "r303", "r312", "r313", "r376", "r377", "r378", "r379", "r380", "r381", "r382", "r383", "r581", "r582", "r583" ], "lang": { "en-us": { "role": { "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.", "label": "Fair Value Measurements Fair Value Hierarchy [Domain]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementsRecurringMember": { "auth_ref": [ "r515", "r518" ], "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 Measurements Recurring [Member]", "terseLabel": "Fair Value, Recurring" } } }, "localname": "FairValueMeasurementsRecurringMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueOfFinancialInstrumentsPolicy": { "auth_ref": [ "r519", "r520" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for determining the fair value of financial instruments.", "label": "Fair Value Of Financial Instruments Policy", "terseLabel": "Financial instruments" } } }, "localname": "FairValueOfFinancialInstrumentsPolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinancialInstrumentAxis": { "auth_ref": [ "r218", "r219", "r221", "r222", "r223", "r239", "r240", "r241", "r242", "r243", "r244", "r245", "r246", "r247", "r311", "r326", "r498", "r578", "r579", "r580", "r581", "r582", "r583", "r584", "r585", "r586", "r587", "r588", "r589", "r590", "r591", "r593", "r594", "r595", "r596", "r597", "r598", "r599", "r600", "r601", "r602", "r603", "r604", "r605", "r606", "r607", "r608", "r731", "r732", "r733", "r734", "r735", "r736", "r737" ], "lang": { "en-us": { "role": { "documentation": "Information by type of financial instrument.", "label": "Financial Instrument [Axis]", "terseLabel": "Financial Instrument" } } }, "localname": "FinancialInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Finite Lived Intangible Asset Useful Life", "terseLabel": "Estimated useful life", "verboseLabel": "Term of land certificate" } } }, "localname": "FiniteLivedIntangibleAssetUsefulLife", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "durationItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization": { "auth_ref": [ "r257" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails": { "order": 10030.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Finite Lived Intangible Assets Accumulated Amortization", "negatedLabel": "Less: Accumulated amortization" } } }, "localname": "FiniteLivedIntangibleAssetsAccumulatedAmortization", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths": { "auth_ref": [ "r259" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails": { "order": 10010.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized 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": "Finite Lived Intangible Assets Amortization Expense Next Twelve Months", "terseLabel": "2022" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of amortization expense of assets, excluding financial assets, that lack physical substance, having a limited useful life.", "label": "Finite Lived Intangible Assets Amortization Expense Table [Text Block]", "terseLabel": "Summary of Estimated Useful Lives of Intangible Assets" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree": { "auth_ref": [ "r259" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails": { "order": 10030.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third 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": "Finite Lived Intangible Assets Amortization Expense Year Three", "terseLabel": "2024" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearThree", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo": { "auth_ref": [ "r259" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails": { "order": 10020.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second 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": "Finite Lived Intangible Assets Amortization Expense Year Two", "terseLabel": "2023" } } }, "localname": "FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r254", "r255", "r257", "r260", "r616", "r620" ], "lang": { "en-us": { "role": { "documentation": "Information by major type or class of finite-lived intangible assets.", "label": "Finite Lived Intangible Assets By Major Class [Axis]", "terseLabel": "Finite-Lived Intangible Assets by Major Class" } } }, "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsGross": { "auth_ref": [ "r257", "r620" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails": { "order": 10010.0, "parentTag": "us-gaap_FiniteLivedIntangibleAssetsNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Finite Lived Intangible Assets Gross", "terseLabel": "Intangible assets, gross" } } }, "localname": "FiniteLivedIntangibleAssetsGross", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FiniteLivedIntangibleAssetsLineItems": { "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": "Finite Lived Intangible Assets [Line Items]", "terseLabel": "Finite Lived Intangible Assets [Line Items]" } } }, "localname": "FiniteLivedIntangibleAssetsLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r254", "r256" ], "lang": { "en-us": { "role": { "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.", "label": "Finite Lived Intangible Assets Major Class Name [Domain]", "terseLabel": "Finite-Lived Intangible Assets, Major Class Name" } } }, "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FiniteLivedIntangibleAssetsNet": { "auth_ref": [ "r257", "r616" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10280.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Finite Lived Intangible Assets Net", "terseLabel": "Intangible assets, net", "totalLabel": "Intangible assets, net" } } }, "localname": "FiniteLivedIntangibleAssetsNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfAmortizationExpensesOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ForeignCurrencyExchangeRateTranslation1": { "auth_ref": [ "r540", "r541" ], "lang": { "en-us": { "role": { "documentation": "Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.", "label": "Foreign Currency Exchange Rate Translation1", "terseLabel": "Currency exchange rate, Renminbi (\"RMB\") to U.S. dollar" } } }, "localname": "ForeignCurrencyExchangeRateTranslation1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleIAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "pureItemType" }, "us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock": { "auth_ref": [ "r542" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for (1) transactions denominated in a currency other than the reporting enterprise's functional currency, (2) translating foreign currency financial statements that are incorporated into the financial statements of the reporting enterprise by consolidation, combination, or the equity method of accounting, and (3) remeasurement of the financial statements of a foreign reporting enterprise in a hyperinflationary economy.", "label": "Foreign Currency Transactions And Translations Policy [Text Block]", "terseLabel": "Foreign currency translation and transactions" } } }, "localname": "ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_GainLossOnSaleOfPropertyPlantEquipment": { "auth_ref": [ "r121" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10240.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.", "label": "Gain Loss On Sale Of Property Plant Equipment", "negatedLabel": "Loss on disposal of property, equipment and land use right" } } }, "localname": "GainLossOnSaleOfPropertyPlantEquipment", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainOrLossOnSaleOfStockInSubsidiary": { "auth_ref": [ "r97", "r98", "r121", "r633", "r661" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10270.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10110.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries.", "label": "Gain Or Loss On Sale Of Stock In Subsidiary", "negatedLabel": "Gain from disposal of subsidiaries", "terseLabel": "Gain on disposal of subsidiaries" } } }, "localname": "GainOrLossOnSaleOfStockInSubsidiary", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiariesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_GeneralAndAdministrativeExpense": { "auth_ref": [ "r101" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10160.0, "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", "negatedLabel": "General and administrative expenses (including share-based compensation expenses of RMB1,979, RMB15,324 and RMB681for the years ended December 31, 2019, 2020 and 2021, respectively)", "negatedTerseLabel": "General and administrative expenses" } } }, "localname": "GeneralAndAdministrativeExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_GeneralAndAdministrativeExpenseMember": { "auth_ref": [ "r96" ], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing general and administrative expense.", "label": "General And Administrative Expense [Member]", "terseLabel": "General and Administrative Expense" } } }, "localname": "GeneralAndAdministrativeExpenseMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_GrossProfit": { "auth_ref": [ "r99", "r137", "r189", "r194", "r197", "r200", "r203", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r523" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10120.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.", "label": "Gross Profit", "terseLabel": "Gross profit", "totalLabel": "Gross profit" } } }, "localname": "GrossProfit", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_HeldToMaturitySecuritiesCurrent": { "auth_ref": [ "r215", "r217", "r238" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails": { "order": 10010.0, "parentTag": "us-gaap_ShortTermInvestments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity), classified as current.", "label": "Held To Maturity Securities Current", "terseLabel": "Held-to-maturity investments" } } }, "localname": "HeldToMaturitySecuritiesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairmentOfInvestments": { "auth_ref": [ "r216" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10100.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.", "label": "Impairment Of Investments", "negatedLabel": "Impairment loss on long-term investments" } } }, "localname": "ImpairmentOfInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock": { "auth_ref": [ "r262", "r270" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for recognizing and measuring the impairment of long-lived assets. An entity also may disclose its accounting policy for long-lived assets to be sold. This policy excludes goodwill and intangible assets.", "label": "Impairment Or Disposal Of Long Lived Assets Policy [Text Block]", "terseLabel": "Impairment of long-lived assets" } } }, "localname": "ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeLossFromContinuingOperationsAttributableToParentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Loss From Continuing Operations Attributable To Parent [Abstract]", "terseLabel": "Net (loss)/income attributable to Sunlands Technology Group used in basic and diluted net loss per share:" } } }, "localname": "IncomeLossFromContinuingOperationsAttributableToParentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest": { "auth_ref": [ "r90", "r189", "r194", "r197", "r200", "r203", "r621", "r634", "r640", "r662" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails": { "order": 10010.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10030.0, "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 Extraordinary Items Noncontrolling Interest", "terseLabel": "Loss before income tax expenses", "totalLabel": "(Loss)/income before income tax expenses" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r91", "r121", "r186", "r224", "r632", "r656" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10250.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10050.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 } }, "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", "negatedLabel": "Loss/(gain) from equity method investments", "terseLabel": "(Loss)/gain from equity method investments", "verboseLabel": "(Loss) gain from equity method investments" } } }, "localname": "IncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromSubsidiariesNetOfTax": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails": { "order": 10030.0, "parentTag": "us-gaap_ProfitLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of income (loss) of subsidiary attributable to the parent entity.", "label": "Income Loss From Subsidiaries Net Of Tax", "terseLabel": "(Loss)/income from investment in subsidiaries" } } }, "localname": "IncomeLossFromSubsidiariesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationAxis": { "auth_ref": [ "r268", "r272" ], "lang": { "en-us": { "role": { "documentation": "Information by location in the income statement.", "label": "Income Statement Location [Axis]", "terseLabel": "Income Statement Location" } } }, "localname": "IncomeStatementLocationAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeStatementLocationDomain": { "auth_ref": [ "r272" ], "lang": { "en-us": { "role": { "documentation": "Location in the income statement.", "label": "Income Statement Location [Domain]", "terseLabel": "Income Statement Location" } } }, "localname": "IncomeStatementLocationDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_IncomeTaxAuthorityNameAxis": { "auth_ref": [ "r434" ], "lang": { "en-us": { "role": { "documentation": "Information by name of taxing authority.", "label": "Income Tax Authority Name [Axis]", "terseLabel": "Income Tax Authority, Name" } } }, "localname": "IncomeTaxAuthorityNameAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxAuthorityNameDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Named agency, division or body that levies income taxes, examines tax returns for compliance, or grants exemptions from or makes other decisions pertaining to income taxes.", "label": "Income Tax Authority Name [Domain]", "terseLabel": "Income Tax Authority, Name" } } }, "localname": "IncomeTaxAuthorityNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r138", "r432", "r435", "r442", "r451", "r454", "r456", "r457", "r458" ], "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]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r139", "r155", "r156", "r187", "r430", "r452", "r455", "r663" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails": { "order": 10020.0, "parentTag": "us-gaap_ProfitLoss", "weight": -1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10040.0, "parentTag": "us-gaap_ProfitLoss", "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 (expenses)/benefit", "terseLabel": "Income tax expenses", "totalLabel": "Income tax expenses/(benefit)", "verboseLabel": "Income tax expenses" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxPolicyTextBlock": { "auth_ref": [ "r84", "r426", "r427", "r435", "r436", "r441", "r446" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.", "label": "Income Tax Policy [Text Block]", "terseLabel": "Income taxes" } } }, "localname": "IncomeTaxPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance": { "auth_ref": [ "r431" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails": { "order": 10040.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.", "label": "Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance", "terseLabel": "Change in valuation allowance" } } }, "localname": "IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r431" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails": { "order": 10010.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate", "terseLabel": "Income tax expenses computed at applicable tax rates of 25%" } } }, "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveTaxRateAndStatutoryIncomeTaxRateApplicableToPRCOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaid": { "auth_ref": [ "r118", "r125" ], "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.", "label": "Income Taxes Paid", "terseLabel": "Income tax paid" } } }, "localname": "IncomeTaxesPaid", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInContractWithCustomerLiability": { "auth_ref": [ "r120", "r610" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10340.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.", "label": "Increase Decrease In Contract With Customer Liability", "terseLabel": "Deferred revenue" } } }, "localname": "IncreaseDecreaseInContractWithCustomerLiability", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInDeferredCharges": { "auth_ref": [ "r120" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10290.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The increase (decrease) during the reporting period in the value of expenditures made during the current reporting period for benefits that will be received over a period of years. Deferred charges differ from prepaid expenses in that they usually extend over a long period of time and may or may not be regularly recurring costs of operation.", "label": "Increase Decrease In Deferred Charges", "negatedLabel": "Deferred costs" } } }, "localname": "IncreaseDecreaseInDeferredCharges", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Increase Decrease In Operating Capital [Abstract]", "terseLabel": "Changes in operating assets and liabilities:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities": { "auth_ref": [ "r120" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10330.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The increase (decrease) during the reporting period in other obligations or expenses incurred but not yet paid.", "label": "Increase Decrease In Other Accounts Payable And Accrued Liabilities", "terseLabel": "Accrued expenses and other current liabilities" } } }, "localname": "IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherNoncurrentAssets": { "auth_ref": [ "r120" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10320.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in noncurrent assets classified as other.", "label": "Increase Decrease In Other Noncurrent Assets", "negatedLabel": "Other non-current assets" } } }, "localname": "IncreaseDecreaseInOtherNoncurrentAssets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10370.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in noncurrent operating liabilities classified as other.", "label": "Increase Decrease In Other Noncurrent Liabilities", "terseLabel": "Other non-current liabilities" } } }, "localname": "IncreaseDecreaseInOtherNoncurrentLiabilities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets": { "auth_ref": [ "r120" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10280.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in prepaid expenses, and assets classified as other.", "label": "Increase Decrease In Prepaid Deferred Expense And Other Assets", "negatedLabel": "Prepaid expenses and other current assets" } } }, "localname": "IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_InlandRevenueHongKongMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Designated tax department of the government of Hong Kong.", "label": "Inland Revenue Hong Kong [Member]", "terseLabel": "Hong Kong" } } }, "localname": "InlandRevenueHongKongMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_IntangibleAssetsDisclosureTextBlock": { "auth_ref": [ "r261" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for all or part of the information related to intangible assets.", "label": "Intangible Assets Disclosure [Text Block]", "terseLabel": "Intangible Assets, Net" } } }, "localname": "IntangibleAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNet" ], "xbrltype": "textBlockItemType" }, "us-gaap_IntangibleAssetsFiniteLivedPolicy": { "auth_ref": [ "r132", "r256", "r612", "r613", "r614", "r616" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for finite-lived intangible assets. This accounting policy also might address: (1) the amortization method used; (2) the useful lives of such assets; and (3) how the entity assesses and measures impairment of such assets.", "label": "Intangible Assets Finite Lived Policy", "terseLabel": "Intangible assets, net" } } }, "localname": "IntangibleAssetsFiniteLivedPolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IntangibleAssetsNetExcludingGoodwillAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Intangible Assets Net Excluding Goodwill [Abstract]" } } }, "localname": "IntangibleAssetsNetExcludingGoodwillAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r88", "r183", "r543", "r546", "r639" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10080.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.", "label": "Interest Expense", "negatedLabel": "Interest expense" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r113", "r117", "r125" ], "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 Net", "terseLabel": "Interest paid" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestReceivableCurrent": { "auth_ref": [ "r72" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10060.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.", "label": "Interest Receivable Current", "terseLabel": "Interest receivables" } } }, "localname": "InterestReceivableCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeInterest": { "auth_ref": [ "r102", "r182" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10070.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.", "label": "Investment Income Interest", "terseLabel": "Interest income" } } }, "localname": "InvestmentIncomeInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentTypeAxis": { "auth_ref": [ "r688", "r689", "r690", "r691", "r692", "r693", "r694", "r695", "r696", "r697", "r698", "r699", "r700", "r701", "r702" ], "lang": { "en-us": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]", "terseLabel": "Investment Type" } } }, "localname": "InvestmentTypeAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeCategorizationMember": { "auth_ref": [ "r688", "r689", "r690", "r691", "r692", "r693", "r694", "r695", "r696", "r697", "r698", "r699", "r700", "r701", "r702" ], "lang": { "en-us": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investment Type Categorization [Member]", "terseLabel": "Investments" } } }, "localname": "InvestmentTypeCategorizationMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureCommitmentAndContingenciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Investments Debt And Equity Securities [Abstract]" } } }, "localname": "InvestmentsDebtAndEquitySecuritiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_InvestmentsFairValueDisclosure": { "auth_ref": [ "r510" ], "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": "Short-term investments" } } }, "localname": "InvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": { "auth_ref": [ "r220", "r622", "r641", "r703", "r738" ], "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]", "terseLabel": "Short-Term Investments" } } }, "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestments" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeasePracticalExpedientsPackage": { "auth_ref": [ "r551", "r552" ], "lang": { "en-us": { "role": { "documentation": "Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease.", "label": "Lease Practical Expedients Package", "terseLabel": "Practical expedients, package" } } }, "localname": "LeasePracticalExpedientsPackage", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "booleanItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_LesseeFinanceLeaseDescription": { "auth_ref": [ "r559" ], "lang": { "en-us": { "role": { "documentation": "Description of lessee's finance lease.", "label": "Lessee Finance Lease Description", "terseLabel": "Finance lease, description" } } }, "localname": "LesseeFinanceLeaseDescription", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r558" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee Leases Policy [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedDescription": { "auth_ref": [ "r560" ], "lang": { "en-us": { "role": { "documentation": "Description of lessee's operating lease that has not yet commenced. Including, but not limited to, nature of involvement with construction or design of underlying asset for lease.", "label": "Lessee Operating Lease Lease Not Yet Commenced Description", "terseLabel": "Operating lease, lease not yet commenced, description" } } }, "localname": "LesseeOperatingLeaseLeaseNotYetCommencedDescription", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r565" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.", "label": "Lessee Operating Lease Liability Maturity Table [Text Block]", "terseLabel": "Summary of Maturity Analysis of Annual Undiscounted Cash Flows for Lease Liabilities" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails2": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.", "label": "Lessee Operating Lease Liability Payments Due", "totalLabel": "Total future lease payments" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid 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": "Lessee Operating Lease Liability Payments Due Next Twelve Months", "terseLabel": "2022" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10050.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in 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": "Lessee Operating Lease Liability Payments Due Year Five", "terseLabel": "2026" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10040.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth 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": "Lessee Operating Lease Liability Payments Due Year Four", "terseLabel": "2025" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10030.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third 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": "Lessee Operating Lease Liability Payments Due Year Three", "terseLabel": "2024" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second 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": "Lessee Operating Lease Liability Payments Due Year Two", "terseLabel": "2023" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r565" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails2": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee Operating Lease Liability Undiscounted Excess Amount", "terseLabel": "Less: Imputed interest" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeasesTextBlock": { "auth_ref": [ "r567" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.", "label": "Lessee Operating Leases [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeOperatingLeasesTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeases" ], "xbrltype": "textBlockItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r57", "r137", "r196", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r470", "r479", "r480", "r523", "r574", "r575" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10010.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10010.0, "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": "Consolidated VIE creditor", "totalLabel": "TOTAL LIABILITIES" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities [Abstract]", "terseLabel": "LIABILITIES" } } }, "localname": "LiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r44", "r137", "r227", "r523", "r576", "r628", "r653" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "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 Stockholders Equity", "totalLabel": "TOTAL LIABILITIES AND SHAREHOLDERS\u2019 DEFICIT" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities And Stockholders Equity [Abstract]", "terseLabel": "LIABILITIES AND SHAREHOLDERS\u2019 DEFICIT" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesCurrent": { "auth_ref": [ "r59", "r137", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r470", "r479", "r480", "r523", "r574", "r575", "r576" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10090.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails": { "order": 10010.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10130.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.", "label": "Liabilities Current", "totalLabel": "Total current liabilities" } } }, "localname": "LiabilitiesCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesCurrentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities Current [Abstract]", "terseLabel": "Current liabilities" } } }, "localname": "LiabilitiesCurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesNoncurrent": { "auth_ref": [ "r19", "r20", "r21", "r32", "r33", "r137", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r470", "r479", "r480", "r523", "r574", "r575" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10140.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation due after one year or beyond the normal operating cycle, if longer.", "label": "Liabilities Noncurrent", "totalLabel": "Total non-current liabilities" } } }, "localname": "LiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesNoncurrentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities Noncurrent [Abstract]", "terseLabel": "Non-current liabilities" } } }, "localname": "LiabilitiesNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_LicenseMember": { "auth_ref": [ "r365" ], "lang": { "en-us": { "role": { "documentation": "Right to use intangible asset. Intangible asset includes, but is not limited to, patent, copyright, technology, manufacturing process, software or trademark.", "label": "License [Member]", "terseLabel": "License" } } }, "localname": "LicenseMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LimitedPartnerMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Party to a partnership business who has limited liability.", "label": "Limited Partner [Member]", "terseLabel": "Limited Partnerships" } } }, "localname": "LimitedPartnerMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LineOfCreditFacilityAxis": { "auth_ref": [ "r55", "r136" ], "lang": { "en-us": { "role": { "documentation": "Information by name of lender, which may be a single entity (for example, but not limited to, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit.", "label": "Line Of Credit Facility [Axis]", "terseLabel": "Lender Name" } } }, "localname": "LineOfCreditFacilityAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityLenderDomain": { "auth_ref": [ "r55", "r136" ], "lang": { "en-us": { "role": { "documentation": "Identification of the lender, which may be a single entity (for example, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit, including a letter of credit facility.", "label": "Line Of Credit Facility Lender [Domain]", "terseLabel": "Line of Credit Facility, Lender" } } }, "localname": "LineOfCreditFacilityLenderDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LongTermDebtCurrent": { "auth_ref": [ "r56" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10240.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long Term Debt Current", "terseLabel": "Long-term debt, current portion" } } }, "localname": "LongTermDebtCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtNoncurrent": { "auth_ref": [ "r61" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10190.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long Term Debt Noncurrent", "terseLabel": "Long-term debt, non-current portion" } } }, "localname": "LongTermDebtNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtTextBlock": { "auth_ref": [ "r316" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for long-term debt.", "label": "Long Term Debt [Text Block]", "terseLabel": "Long-Term Debt" } } }, "localname": "LongTermDebtTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebt" ], "xbrltype": "textBlockItemType" }, "us-gaap_LongTermInvestments": { "auth_ref": [ "r48" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10320.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).", "label": "Long Term Investments", "terseLabel": "Long-term investments" } } }, "localname": "LongTermInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongtermDebtTypeAxis": { "auth_ref": [ "r61" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-term debt.", "label": "Longterm Debt Type [Axis]", "terseLabel": "Long-term Debt, Type" } } }, "localname": "LongtermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermDebtTypeDomain": { "auth_ref": [ "r61", "r281" ], "lang": { "en-us": { "role": { "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Longterm Debt Type [Domain]", "terseLabel": "Long-term Debt, Type" } } }, "localname": "LongtermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MarketableSecuritiesTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.", "label": "Marketable Securities [Text Block]", "terseLabel": "Schedule of Short-Term Investment" } } }, "localname": "MarketableSecuritiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_MinorityInterest": { "auth_ref": [ "r71", "r137", "r227", "r283", "r287", "r288", "r289", "r292", "r293", "r523", "r627", "r652" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10050.0, "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": "Minority Interest", "terseLabel": "Noncontrolling interest" } } }, "localname": "MinorityInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_MinorityInterestOwnershipPercentageByParent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The parent entity's interest in net assets of the subsidiary, expressed as a percentage.", "label": "Minority Interest Ownership Percentage By Parent", "terseLabel": "Ownership percentage by parent", "verboseLabel": "Percentage of direct or indirect economic ownership" } } }, "localname": "MinorityInterestOwnershipPercentageByParent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "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": "Mortgage Loan", "verboseLabel": "Mortgage Bank Loan" } } }, "localname": "MortgagesMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r116" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10030.0, "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 used in financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Financing Activities [Abstract]", "terseLabel": "CASH FLOWS FROM FINANCING ACTIVITIES" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r116" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10010.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10020.0, "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 generated from/(used in) investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Investing Activities [Abstract]", "terseLabel": "CASH FLOWS FROM INVESTING ACTIVITIES" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r116", "r119", "r122" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10030.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10010.0, "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", "totalLabel": "Net cash used in operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Operating Activities [Abstract]", "terseLabel": "CASH FLOWS FROM OPERATING ACTIVITIES" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r7", "r79", "r81", "r87", "r92", "r122", "r137", "r146", "r150", "r151", "r152", "r153", "r155", "r156", "r161", "r189", "r194", "r197", "r200", "r203", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r509", "r523", "r635", "r657" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.", "label": "Net Income Loss", "terseLabel": "Net (loss)/income attributable to ordinary shareholders", "totalLabel": "Net (loss)/income attributable to Sunlands Technology Group" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAttributableToNoncontrollingInterest": { "auth_ref": [ "r79", "r81", "r87", "r155", "r156", "r474", "r494" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10020.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 } }, "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 loss attributable to noncontrolling interest" } } }, "localname": "NetIncomeLossAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance": { "auth_ref": [ "r335", "r468", "r476" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.", "label": "Noncontrolling Interest Increase From Subsidiary Equity Issuance", "terseLabel": "Disposal of a subsidiary" } } }, "localname": "NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncontrollingInterestMember": { "auth_ref": [ "r142", "r143", "r144", "r334", "r463" ], "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 Interest" } } }, "localname": "NoncontrollingInterestMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_NonrecourseMember": { "auth_ref": [ "r470", "r480" ], "lang": { "en-us": { "role": { "documentation": "Liability for which creditor does not have recourse to debtor but rather has recourse only to property used for collateral in transaction or other specific property.", "label": "Nonrecourse [Member]", "terseLabel": "Nonrecourse" } } }, "localname": "NonrecourseMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_NumberOfOperatingSegments": { "auth_ref": [ "r177" ], "lang": { "en-us": { "role": { "documentation": "Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.", "label": "Number Of Operating Segments", "terseLabel": "Number of operating segments" } } }, "localname": "NumberOfOperatingSegments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSegmentReportingAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "us-gaap_OperatingExpenses": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10130.0, "parentTag": "us-gaap_OperatingIncomeLoss", "weight": -1.0 } }, "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", "negatedTotalLabel": "Total operating expenses" } } }, "localname": "OperatingExpenses", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingExpensesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Operating Expenses [Abstract]", "terseLabel": "Operating expenses" } } }, "localname": "OperatingExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingIncomeLoss": { "auth_ref": [ "r189", "r194", "r197", "r200", "r203" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10060.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "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": "(Loss)/income from operations" } } }, "localname": "OperatingIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r556" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails2": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease Liability", "terseLabel": "Total lease liability balance" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfMaturityAnalysisOfAnnualUndiscountedCashFlowsForLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityCurrent": { "auth_ref": [ "r556" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10220.0, "parentTag": "us-gaap_LiabilitiesCurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.", "label": "Operating Lease Liability Current", "terseLabel": "Lease liabilities, current (including lease liabilities, current of the consolidated VIEs without recourse to Sunlands Technology Group of RMB15,833 and RMB8,366 as of December 31, 2020 and 2021, respectively)", "verboseLabel": "Lease liabilities, current" } } }, "localname": "OperatingLeaseLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityNoncurrent": { "auth_ref": [ "r556" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails": { "order": 10030.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10160.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.", "label": "Operating Lease Liability Noncurrent", "terseLabel": "Lease liabilities, non-current (including lease liabilities, non-current of the consolidated VIEs without recourse to Sunlands Technology Group of RMB340,763 and RMB318,598 as of December 31, 2020 and 2021, respectively)", "verboseLabel": "Lease liabilities, non-current" } } }, "localname": "OperatingLeaseLiabilityNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeasePayments": { "auth_ref": [ "r557", "r562" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.", "label": "Operating Lease Payments", "terseLabel": "Cash paid for amounts included in the measurement of lease liabilities, Operating cash flows from operating leases" } } }, "localname": "OperatingLeasePayments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfOperatingLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r555" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10300.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease Right Of Use Asset", "terseLabel": "Right-of-use assets" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r564", "r566" ], "lang": { "en-us": { "role": { "documentation": "Weighted average discount rate for operating lease calculated at point in time.", "label": "Operating Lease Weighted Average Discount Rate Percent", "terseLabel": "Operating leases, Weighted average discount rate" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfOperatingLeasesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r563", "r566" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Operating Lease Weighted Average Remaining Lease Term1", "terseLabel": "Operating leases, Weighted average remaining lease term" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesSummaryOfOperatingLeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasesRentExpenseNet": { "auth_ref": [ "r550" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.", "label": "Operating Leases Rent Expense Net", "terseLabel": "Total operating lease expense" } } }, "localname": "OperatingLeasesRentExpenseNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLossCarryforwards": { "auth_ref": [ "r443" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.", "label": "Operating Loss Carryforwards", "terseLabel": "Operating loss carryforwards" } } }, "localname": "OperatingLossCarryforwards", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Organization Consolidation And Presentation Of Financial Statements [Abstract]" } } }, "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock": { "auth_ref": [ "r9", "r496" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.", "label": "Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block]", "terseLabel": "Organization and Basis of Presentation" } } }, "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentation" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherAssetsMiscellaneousNoncurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails": { "order": 10040.0, "parentTag": "us-gaap_OtherAssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.", "label": "Other Assets Miscellaneous Noncurrent", "terseLabel": "Others" } } }, "localname": "OtherAssetsMiscellaneousNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsNoncurrent": { "auth_ref": [ "r52" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10130.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10340.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noncurrent assets classified as other.", "label": "Other Assets Noncurrent", "terseLabel": "Other non-current assets", "totalLabel": "Total" } } }, "localname": "OtherAssetsNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax": { "auth_ref": [ "r74" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME": { "order": 10040.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax and reclassification adjustments of gain (loss) on 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.", "label": "Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax", "terseLabel": "Change in cumulative foreign currency translation adjustments", "verboseLabel": "Foreign currency translation adjustments" } } }, "localname": "OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]", "terseLabel": "Other comprehensive income/(loss), net of tax effect of nil:" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME" ], "xbrltype": "stringItemType" }, "us-gaap_OtherLiabilitiesNoncurrent": { "auth_ref": [ "r62" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10110.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10180.0, "parentTag": "us-gaap_LiabilitiesNoncurrent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer.", "label": "Other Liabilities Noncurrent", "terseLabel": "Other non-current liabilities (including other non-current liabilities of the consolidated VIEs without recourse to Sunlands Technology Group of RMB135 and RMB963 as of December 31, 2020 and 2021, respectively)", "verboseLabel": "Other non-current liabilities" } } }, "localname": "OtherLiabilitiesNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpense": { "auth_ref": [ "r103" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10090.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (expense) related to nonoperating activities, classified as other.", "label": "Other Nonoperating Income Expense", "terseLabel": "Other income, net" } } }, "localname": "OtherNonoperatingIncomeExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherNonoperatingIncomeExpenseMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing other nonoperating income (expense).", "label": "Other Nonoperating Income Expense [Member]", "terseLabel": "Other Income" } } }, "localname": "OtherNonoperatingIncomeExpenseMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherPrepaidExpenseCurrent": { "auth_ref": [ "r11", "r15", "r251" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10090.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.", "label": "Other Prepaid Expense Current", "terseLabel": "Others" } } }, "localname": "OtherPrepaidExpenseCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherReceivablesNetCurrent": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10080.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer.", "label": "Other Receivables Net Current", "terseLabel": "Other receivables" } } }, "localname": "OtherReceivablesNetCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale": { "auth_ref": [ "r216" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10260.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).", "label": "Other Than Temporary Impairment Loss Debt Securities Available For Sale", "terseLabel": "Impairment loss on long-term investments" } } }, "localname": "OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "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 Sunlands Technology Group Shareholders' Deficit" } } }, "localname": "ParentMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_PartnerTypeOfPartnersCapitalAccountAxis": { "auth_ref": [ "r336" ], "lang": { "en-us": { "role": { "documentation": "Information by type or class of partner's capital account. Examples of classes of partners include, but not limited to, general partners, limited partners, preferred partners, and other ownership interests.", "label": "Partner Type Of Partners Capital Account [Axis]", "terseLabel": "Partner Type" } } }, "localname": "PartnerTypeOfPartnersCapitalAccountAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain": { "auth_ref": [ "r337", "r687" ], "lang": { "en-us": { "role": { "documentation": "Capital accounts of each type or class of partner. Examples of classes of partners include, but are not limited to, general partners, limited partners, preferred partners, and other ownership interests.", "label": "Partner Type Of Partners Capital Account Name [Domain]", "terseLabel": "Partner Type of Partners' Capital Account, Name" } } }, "localname": "PartnerTypeOfPartnersCapitalAccountNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PayablesAndAccrualsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Payables And Accruals [Abstract]" } } }, "localname": "PayablesAndAccrualsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_PaymentsForRepurchaseOfEquity": { "auth_ref": [ "r111" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10060.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to reacquire common and preferred stock.", "label": "Payments For Repurchase Of Equity", "negatedLabel": "Share repurchase" } } }, "localname": "PaymentsForRepurchaseOfEquity", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireEquityMethodInvestments": { "auth_ref": [ "r107" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10090.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.", "label": "Payments To Acquire Equity Method Investments", "negatedLabel": "Payment for equity method investments" } } }, "localname": "PaymentsToAcquireEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireIntangibleAssets": { "auth_ref": [ "r108" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10150.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.", "label": "Payments To Acquire Intangible Assets", "negatedLabel": "Acquisition of intangible assets" } } }, "localname": "PaymentsToAcquireIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r108" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10140.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments To Acquire Property Plant And Equipment", "negatedLabel": "Acquisition of property and equipment" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireShortTermInvestments": { "auth_ref": [ "r109" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10040.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10110.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are 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 To Acquire Short Term Investments", "negatedLabel": "Purchase of short-term investments" } } }, "localname": "PaymentsToAcquireShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PlanNameAxis": { "auth_ref": [ "r392", "r409" ], "lang": { "en-us": { "role": { "documentation": "Information by plan name for share-based payment arrangement.", "label": "Plan Name [Axis]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PlanNameDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Plan name for share-based payment arrangement.", "label": "Plan Name [Domain]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PledgedStatusAxis": { "auth_ref": [ "r469", "r479" ], "lang": { "en-us": { "role": { "documentation": "Information by pledged or not pledged status of asset owned by entity.", "label": "Pledged Status [Axis]", "terseLabel": "Pledged Status" } } }, "localname": "PledgedStatusAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PledgedStatusDomain": { "auth_ref": [ "r469", "r479" ], "lang": { "en-us": { "role": { "documentation": "Pledged or not pledged status of asset owned by entity.", "label": "Pledged Status [Domain]", "terseLabel": "Pledged Status" } } }, "localname": "PledgedStatusDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PrepaidAdvertising": { "auth_ref": [ "r13", "r249", "r251" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10020.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of consideration paid in advance for advertising that provides economic benefits within a future period of one year or the normal operating cycle, if longer.", "label": "Prepaid Advertising", "terseLabel": "Prepaid marketing expenses" } } }, "localname": "PrepaidAdvertising", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrepaidExpenseAndOtherAssetsCurrent": { "auth_ref": [ "r14", "r45", "r46" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10150.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10380.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.", "label": "Prepaid Expense And Other Assets Current", "terseLabel": "Prepaid expenses and other current assets", "totalLabel": "Total" } } }, "localname": "PrepaidExpenseAndOtherAssetsCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrepaidExpenseCurrent": { "auth_ref": [ "r11", "r15", "r250", "r251" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10030.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.", "label": "Prepaid Expense Current", "terseLabel": "Prepaid expenses" } } }, "localname": "PrepaidExpenseCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrepaidExpenseNoncurrent": { "auth_ref": [ "r52" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails": { "order": 10010.0, "parentTag": "us-gaap_OtherAssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.", "label": "Prepaid Expense Noncurrent", "terseLabel": "Prepayment to acquire a building" } } }, "localname": "PrepaidExpenseNoncurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsSummaryOfOtherNonCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PrepaidRent": { "auth_ref": [ "r12", "r15", "r248", "r251" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10050.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of asset related to consideration paid in advance for rent that provides economic benefits within a future period of one year or the normal operating cycle, if longer.", "label": "Prepaid Rent", "terseLabel": "Deposits" } } }, "localname": "PrepaidRent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromBankDebt": { "auth_ref": [ "r110" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10050.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from bank borrowing during the year.", "label": "Proceeds From Bank Debt", "terseLabel": "Proceeds from a bank loan" } } }, "localname": "ProceedsFromBankDebt", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries": { "auth_ref": [ "r104" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10180.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or the sale of investment in consolidated subsidiaries (generally greater than 50 percent).", "label": "Proceeds From Divestiture Of Interest In Consolidated Subsidiaries", "terseLabel": "Proceeds from disposal of subsidiaries" } } }, "localname": "ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments": { "auth_ref": [ "r106", "r109" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails": { "order": 10050.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10120.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from maturities, prepayments, calls and collections of all investments, including securities and other assets, having ready marketability 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": "Proceeds From Maturities Prepayments And Calls Of Shortterm Investments", "terseLabel": "Proceeds from maturity of short-term investments" } } }, "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments": { "auth_ref": [ "r106" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10100.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow associated with the sale, maturity and collection of all investments such as debt, security and so forth during the period.", "label": "Proceeds From Sale Maturity And Collections Of Investments", "terseLabel": "Cash received from investee due to capital reduction" } } }, "localname": "ProceedsFromSaleMaturityAndCollectionsOfInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment": { "auth_ref": [ "r105" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10170.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.", "label": "Proceeds From Sale Of Property Plant And Equipment", "terseLabel": "Proceeds from disposal of property and equipment" } } }, "localname": "ProceedsFromSaleOfPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets": { "auth_ref": [ "r106" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Aggregate cash proceeds received from a combination of transactions in which noncurrent assets are sold, which may include the sale of a business, an investment in an affiliate (including an equity method investee), property, plant and equipment and intangible assets. Excludes sales of trading, available-for-sale, and held-to-maturity securities.", "label": "Proceeds From Sales Of Business Affiliate And Productive Assets", "terseLabel": "Proceeds from disposition of subsidiary group" } } }, "localname": "ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureDisposalOfSubsidiariesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProfitLoss": { "auth_ref": [ "r7", "r79", "r81", "r87", "r114", "r137", "r146", "r155", "r156", "r189", "r194", "r197", "r200", "r203", "r227", "r283", "r284", "r285", "r287", "r288", "r289", "r290", "r291", "r292", "r293", "r465", "r473", "r475", "r494", "r495", "r509", "r523", "r640" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10210.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME": { "order": 10030.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10010.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "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": "Profit Loss", "terseLabel": "Net (loss)/income", "totalLabel": "Net (loss)/income", "verboseLabel": "Net loss for the year" } } }, "localname": "ProfitLoss", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSSINCOME", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Property Plant And Equipment [Abstract]" } } }, "localname": "PropertyPlantAndEquipmentAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentAdditions": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.", "label": "Property Plant And Equipment Additions", "terseLabel": "Buildings purchased under consideration" } } }, "localname": "PropertyPlantAndEquipmentAdditions", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r51", "r267" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.", "label": "Property Plant And Equipment By Type [Axis]", "terseLabel": "Long-Lived Tangible Asset" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": { "auth_ref": [ "r271", "r707", "r708", "r709" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.", "label": "Property Plant And Equipment Disclosure [Text Block]", "terseLabel": "Property and Equipment, Net" } } }, "localname": "PropertyPlantAndEquipmentDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNet" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives": { "auth_ref": [ "r263" ], "lang": { "en-us": { "role": { "documentation": "Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).", "label": "Property Plant And Equipment Estimated Useful Lives", "terseLabel": "Leasehold and buildings improvements" } } }, "localname": "PropertyPlantAndEquipmentEstimatedUsefulLives", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r50", "r265" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails": { "order": 10010.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Gross", "terseLabel": "Total cost", "verboseLabel": "Cost of property and equipment" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentLineItems": { "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": "Property Plant And Equipment [Line Items]", "terseLabel": "Property Plant And Equipment [Line Items]" } } }, "localname": "PropertyPlantAndEquipmentLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r26", "r27", "r267", "r576", "r642", "r654" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10270.0, "parentTag": "us-gaap_AssetsNoncurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Net", "terseLabel": "Property and equipment, net", "totalLabel": "Property and equipment, net" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": { "auth_ref": [ "r49", "r267", "r707", "r708" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.", "label": "Property Plant And Equipment Policy [Text Block]", "terseLabel": "Property and equipment, net" } } }, "localname": "PropertyPlantAndEquipmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTextBlock": { "auth_ref": [ "r26", "r267" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.", "label": "Property Plant And Equipment [Text Block]", "terseLabel": "Summary of Property and Equipment Consisted" } } }, "localname": "PropertyPlantAndEquipmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r26", "r265" ], "lang": { "en-us": { "role": { "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Property Plant And Equipment Type [Domain]", "terseLabel": "Long-Lived Tangible Asset" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PropertyPlantAndEquipmentUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.", "label": "Property Plant And Equipment Useful Life", "terseLabel": "Buildings" } } }, "localname": "PropertyPlantAndEquipmentUsefulLife", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "durationItemType" }, "us-gaap_RecourseStatusAxis": { "auth_ref": [ "r470", "r480" ], "lang": { "en-us": { "role": { "documentation": "Information by recourse or nonrecourse status of liability.", "label": "Recourse Status [Axis]", "terseLabel": "Recourse Status" } } }, "localname": "RecourseStatusAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RecourseStatusDomain": { "auth_ref": [ "r470", "r480" ], "lang": { "en-us": { "role": { "documentation": "Recourse or nonrecourse status of liability.", "label": "Recourse Status [Domain]", "terseLabel": "Recourse Status" } } }, "localname": "RecourseStatusDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RepaymentsOfBankDebt": { "auth_ref": [ "r112" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10080.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to settle a bank borrowing during the year.", "label": "Repayments Of Bank Debt", "negatedLabel": "Repayment of bank loans" } } }, "localname": "RepaymentsOfBankDebt", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_RepaymentsOfSecuredDebt": { "auth_ref": [ "r112" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.", "label": "Repayments Of Secured Debt", "terseLabel": "Repayment of secured loans" } } }, "localname": "RepaymentsOfSecuredDebt", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermDebtAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ResearchAndDevelopmentExpense": { "auth_ref": [ "r425", "r611", "r722" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10150.0, "parentTag": "us-gaap_OperatingExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.", "label": "Research And Development Expense", "negatedLabel": "Product development expenses" } } }, "localname": "ResearchAndDevelopmentExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ResearchAndDevelopmentExpensePolicy": { "auth_ref": [ "r425" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for costs it has incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process.", "label": "Research And Development Expense Policy", "terseLabel": "Product development expenses" } } }, "localname": "ResearchAndDevelopmentExpensePolicy", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RestrictedAssetsDisclosureTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for assets that are restricted in their use, generally by contractual agreements or regulatory requirements. This would include, but not limited to, a description of the restricted assets and the terms of the restriction.", "label": "Restricted Assets Disclosure [Text Block]", "terseLabel": "Restricted Net Assets" } } }, "localname": "RestrictedAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRestrictedNetAssets" ], "xbrltype": "textBlockItemType" }, "us-gaap_RestrictedCashCurrent": { "auth_ref": [ "r10", "r22", "r129" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10360.0, "parentTag": "us-gaap_AssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash restricted as to withdrawal or usage, classified as current. 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.", "label": "Restricted Cash Current", "terseLabel": "Restricted cash" } } }, "localname": "RestrictedCashCurrent", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r40", "r334", "r417", "r576", "r651", "r680", "r685" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10080.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": 1.0 }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10120.0, "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": "Accumulated deficit" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [ "r2", "r142", "r143", "r144", "r147", "r154", "r156", "r235", "r414", "r415", "r416", "r449", "r450", "r507", "r676", "r678" ], "lang": { "en-us": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Accumulated Deficit" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": { "auth_ref": [ "r180", "r181", "r193", "r198", "r199", "r205", "r206", "r209", "r360", "r361", "r615" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10170.0, "parentTag": "us-gaap_GrossProfit", "weight": 1.0 } }, "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": "Net revenues", "totalLabel": "Total net revenues" } } }, "localname": "RevenueFromContractWithCustomerExcludingAssessedTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax": { "auth_ref": [ "r180", "r181", "r193", "r198", "r199", "r205", "r206", "r209", "r360", "r361", "r615" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails": { "order": 10010.0, "parentTag": "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, including 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 Including Assessed Tax", "terseLabel": "Total revenues" } } }, "localname": "RevenueFromContractWithCustomerIncludingAssessedTax", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueFromContractWithCustomerPolicyTextBlock": { "auth_ref": [ "r133", "r352", "r353", "r354", "r355", "r356", "r357", "r358", "r359", "r372" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for revenue from contract with customer.", "label": "Revenue From Contract With Customer Policy [Text Block]", "terseLabel": "Revenue recognition, Deferred Revenue and Cost of revenue" } } }, "localname": "RevenueFromContractWithCustomerPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueFromContractWithCustomerTextBlock": { "auth_ref": [ "r342", "r343", "r344", "r345", "r346", "r347", "r350", "r351", "r363", "r372" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.", "label": "Revenue From Contract With Customer [Text Block]", "terseLabel": "Revenues and Deferred Revenue" } } }, "localname": "RevenueFromContractWithCustomerTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenue" ], "xbrltype": "textBlockItemType" }, "us-gaap_RevenueRemainingPerformanceObligation": { "auth_ref": [ "r348" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of transaction price allocated to performance obligation that has not been recognized as revenue.", "label": "Revenue Remaining Performance Obligation", "terseLabel": "Recognized revenue of remaining performance obligation" } } }, "localname": "RevenueRemainingPerformanceObligation", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1": { "auth_ref": [ "r349" ], "lang": { "en-us": { "role": { "documentation": "Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1", "verboseLabel": "Revenue, remaining performance obligation, expected timing of satisfaction, period" } } }, "localname": "RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1" ], "xbrltype": "durationItemType" }, "us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis": { "auth_ref": [ "r349" ], "lang": { "en-us": { "role": { "documentation": "Start date of time band for expected timing of satisfaction of remaining performance obligation, in YYYY-MM-DD format.", "label": "Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Start Date [Axis]", "terseLabel": "Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date" } } }, "localname": "RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueAdditionalInformationDetails1" ], "xbrltype": "stringItemType" }, "us-gaap_SalesRevenueNetMember": { "auth_ref": [ "r174", "r209" ], "lang": { "en-us": { "role": { "documentation": "Revenue from sale of product and rendering of service and other sources of income, when it serves as benchmark in concentration of risk calculation.", "label": "Sales Revenue Net [Member]", "terseLabel": "Total Net Revenues" } } }, "localname": "SalesRevenueNetMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of accrued liabilities.", "label": "Schedule Of Accrued Liabilities Table [Text Block]", "terseLabel": "Schedule of Accrued Expenses and Other Liabilities" } } }, "localname": "ScheduleOfAccruedLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable": { "auth_ref": [ "r165" ], "lang": { "en-us": { "role": { "documentation": "Schedule for securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by Antidilutive Securities.", "label": "Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]", "terseLabel": "Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]" } } }, "localname": "ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": { "auth_ref": [ "r459", "r460" ], "lang": { "en-us": { "role": { "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.", "label": "Schedule Of Business Acquisitions By Acquisition [Table]", "terseLabel": "Schedule Of Business Acquisitions By Acquisition [Table]" } } }, "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedParentheticalDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": { "auth_ref": [ "r440" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.", "label": "Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]", "terseLabel": "Schedule of Components of Deferred Income Tax" } } }, "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r164" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.", "label": "Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]", "terseLabel": "Schedule of Calculation of Net (Loss) / Income Per Share" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r431" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]", "terseLabel": "Schedule of Reconciliation of Effective Tax Rate and Statutory Income Tax Rate Applicable to PRC Operations" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable": { "auth_ref": [ "r391", "r406", "r418" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about amount recognized for award under share-based payment arrangement. Includes, but is not limited to, amount expensed in statement of income or comprehensive income, amount capitalized in statement of financial position, and corresponding reporting line item in financial statements.", "label": "Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]", "terseLabel": "Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]" } } }, "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock": { "auth_ref": [ "r391", "r406", "r418" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.", "label": "Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block]", "terseLabel": "Schedule of Share-based Compensation Expense Recognized" } } }, "localname": "ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsLineItems": { "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": "Schedule Of Equity Method Investments [Line Items]", "terseLabel": "Schedule Of Equity Method Investments [Line Items]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsTable": { "auth_ref": [ "r7", "r137", "r226", "r227", "r523" ], "lang": { "en-us": { "role": { "documentation": "Summarization of information required and determined to be disclosed concerning equity method investments in common stock. The summarized information includes: (a) the name of each investee or group of investees for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available.", "label": "Schedule Of Equity Method Investments [Table]", "terseLabel": "Schedule Of Equity Method Investments [Table]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLongTermInvestmentsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable": { "auth_ref": [ "r254", "r256", "r616" ], "lang": { "en-us": { "role": { "documentation": "Schedule of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.", "label": "Schedule Of Finite Lived Intangible Assets [Table]", "terseLabel": "Schedule Of Finite Lived Intangible Assets [Table]" } } }, "localname": "ScheduleOfFiniteLivedIntangibleAssetsTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetSummaryOfIntangibleAssetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfIntangibleAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock": { "auth_ref": [ "r254", "r256" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.", "label": "Schedule Of Finite Lived Intangible Assets Table [Text Block]", "terseLabel": "Summary of Intangible Assets" } } }, "localname": "ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfOtherAssetsNoncurrentTextBlock": { "auth_ref": [ "r52" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of noncurrent assets.", "label": "Schedule Of Other Assets Noncurrent [Text Block]", "terseLabel": "Schedule of Other Non-Current Assets" } } }, "localname": "ScheduleOfOtherAssetsNoncurrentTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOtherNonCurrentAssetsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": { "auth_ref": [ "r51", "r267" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.", "label": "Schedule Of Property Plant And Equipment [Table]", "terseLabel": "Schedule Of Property Plant And Equipment [Table]" } } }, "localname": "ScheduleOfPropertyPlantAndEquipmentTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePropertyAndEquipmentNetSummaryOfPropertyAndEquipmentConsistedDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfPropertyAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": { "auth_ref": [ "r392", "r409" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about share-based payment arrangement.", "label": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]", "terseLabel": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]" } } }, "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock": { "auth_ref": [ "r396", "r402", "r403" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.", "label": "Schedule Of Share Based Compensation Stock Options Activity Table [Text Block]", "terseLabel": "Summary of Option Activities and Changes" } } }, "localname": "ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfStockByClassTable": { "auth_ref": [ "r64", "r134", "r170", "r171", "r317", "r318", "r319", "r320", "r321", "r322", "r323", "r324", "r325", "r326", "r328", "r329", "r330", "r331", "r332", "r333", "r334" ], "lang": { "en-us": { "role": { "documentation": "Schedule detailing information related to equity by class of stock. Class of stock includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. It also includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity.", "label": "Schedule Of Stock By Class [Table]", "terseLabel": "Schedule Of Stock By Class [Table]" } } }, "localname": "ScheduleOfStockByClassTable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfVariableInterestEntitiesTable": { "auth_ref": [ "r469", "r470", "r479", "r480", "r481", "r484", "r487", "r491", "r492" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock": { "auth_ref": [ "r256" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets.", "label": "Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block]", "terseLabel": "Summary of Amortization Expenses of Intangible Assets" } } }, "localname": "ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIntangibleAssetsNetTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentDomain": { "auth_ref": [ "r176", "r180", "r181", "r182", "r183", "r184", "r185", "r186", "r187", "r188", "r189", "r190", "r191", "r193", "r194", "r195", "r196", "r197", "r198", "r199", "r200", "r201", "r203", "r209", "r273", "r274", "r668" ], "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": "Segment [Domain]", "terseLabel": "Segments" } } }, "localname": "SegmentDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SegmentReportingAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Segment Reporting [Abstract]" } } }, "localname": "SegmentReportingAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingDisclosureTextBlock": { "auth_ref": [ "r176", "r178", "r179", "r189", "r192", "r197", "r201", "r202", "r203", "r204", "r205", "r208", "r209", "r210" ], "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]", "terseLabel": "Segment Reporting" } } }, "localname": "SegmentReportingDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSegmentReporting" ], "xbrltype": "textBlockItemType" }, "us-gaap_SellingAndMarketingExpense": { "auth_ref": [], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS": { "order": 10140.0, "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", "negatedLabel": "Sales and marketing expenses (including share-based compensation expenses of RMB674 ,RMB14,278 and RMB-14 for the years ended December 31, 2019, 2020 and 2021, respectively)", "negatedTerseLabel": "Sales and marketing expenses" } } }, "localname": "SellingAndMarketingExpense", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "monetaryItemType" }, "us-gaap_SellingAndMarketingExpenseMember": { "auth_ref": [ "r96" ], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing selling and marketing expense.", "label": "Selling And Marketing Expense [Member]", "terseLabel": "Selling and Marketing Expense" } } }, "localname": "SellingAndMarketingExpenseMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanScheduleOfShareBasedCompensationExpenseRecognizedDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock": { "auth_ref": [ "r423" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for inclusion of significant items in the selling, general and administrative (or similar) expense report caption.", "label": "Selling General And Administrative Expenses Policy [Text Block]", "terseLabel": "Sales and marketing expenses" } } }, "localname": "SellingGeneralAndAdministrativeExpensesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r120" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS": { "order": 10220.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noncash expense for share-based payment arrangement.", "label": "Share Based Compensation", "terseLabel": "Share-based compensation" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": { "auth_ref": [ "r401" ], "lang": { "en-us": { "role": { "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value", "terseLabel": "Weighted average grant date fair value, Forfeited" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": { "auth_ref": [ "r400" ], "lang": { "en-us": { "role": { "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value", "periodEndLabel": "Weighted average grant date fair value, Outstanding ending balance", "periodStartLabel": "Weighted average grant date fair value, Outstanding beginning balance" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": { "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": "Share Based Compensation Arrangement By Share Based Payment Award [Line Items]", "terseLabel": "Share Based Compensation Arrangement By Share Based Payment Award [Line Items]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized": { "auth_ref": [ "r393" ], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized for issuance under share-based payment arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized", "terseLabel": "Number of shares approved for grant" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod": { "auth_ref": [ "r399" ], "lang": { "en-us": { "role": { "documentation": "The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period", "negatedLabel": "Number of shares, Forfeited" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Gross number of share options (or share units) granted during the period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross", "terseLabel": "Number of shares granted" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue": { "auth_ref": [ "r409" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value", "periodEndLabel": "Aggregated intrinsic value, Outstanding ending balance", "periodStartLabel": "Aggregated intrinsic value, Outstanding beginning balance" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber": { "auth_ref": [ "r398", "r409" ], "lang": { "en-us": { "role": { "documentation": "Number of options outstanding, including both vested and non-vested options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number", "periodEndLabel": "Number of shares, Outstanding ending balance", "periodStartLabel": "Number of shares, Outstanding beginning balance" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice": { "auth_ref": [ "r397" ], "lang": { "en-us": { "role": { "documentation": "Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price", "periodEndLabel": "Weighted-average exercise price, Outstanding ending balance", "periodStartLabel": "Weighted-average exercise price, Outstanding beginning balance" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r390", "r394" ], "lang": { "en-us": { "role": { "documentation": "Award under share-based payment arrangement.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]", "terseLabel": "Award Type" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price", "terseLabel": "Weighted-average exercise price, Forfeited" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2": { "auth_ref": [ "r404" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2", "terseLabel": "Weighted-average remaining contractual term, Outstanding" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanSummaryOfOptionActivitiesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of options vested.", "label": "Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares", "terseLabel": "Shares vested upon grant" } } }, "localname": "SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShortTermInvestments": { "auth_ref": [ "r31", "r629", "r630", "r647" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10370.0, "parentTag": "us-gaap_AssetsCurrent", "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", "totalLabel": "Total" } } }, "localname": "ShortTermInvestments", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShortTermInvestmentsScheduleOfShortTermInvestmentDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_SignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r130", "r141" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Text Block]", "terseLabel": "Significant Accounting Policies" } } }, "localname": "SignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit": { "auth_ref": [ "r433" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.", "label": "Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit", "terseLabel": "Uncertain tax positions" } } }, "localname": "SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StateAdministrationOfTaxationChinaMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Designated tax department of the government of China.", "label": "State Administration Of Taxation China [Member]", "terseLabel": "China" } } }, "localname": "StateAdministrationOfTaxationChinaMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_StatementBusinessSegmentsAxis": { "auth_ref": [ "r6", "r176", "r180", "r181", "r182", "r183", "r184", "r185", "r186", "r187", "r188", "r189", "r190", "r191", "r193", "r194", "r195", "r196", "r197", "r198", "r199", "r200", "r201", "r203", "r209", "r252", "r269", "r273", "r274", "r668" ], "lang": { "en-us": { "role": { "documentation": "Information by business segments.", "label": "Statement Business Segments [Axis]", "terseLabel": "Segments" } } }, "localname": "StatementBusinessSegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureRevenuesAndDeferredRevenueScheduleOfDisaggregatedRevenuesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r36", "r37", "r38", "r134", "r137", "r158", "r159", "r160", "r162", "r164", "r170", "r171", "r172", "r227", "r283", "r287", "r288", "r289", "r292", "r293", "r320", "r321", "r324", "r325", "r327", "r523", "r731" ], "lang": { "en-us": { "role": { "documentation": "Information by the different classes of stock of the entity.", "label": "Statement Class Of Stock [Axis]", "terseLabel": "Class of Stock" } } }, "localname": "StatementClassOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsParentheticalDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r2", "r67", "r85", "r86", "r87", "r142", "r143", "r144", "r147", "r154", "r156", "r169", "r235", "r327", "r334", "r414", "r415", "r416", "r449", "r450", "r507", "r534", "r535", "r536", "r537", "r538", "r539", "r676", "r677", "r678", "r746" ], "lang": { "en-us": { "role": { "documentation": "Information by component of equity.", "label": "Statement Equity Components [Axis]", "terseLabel": "Treasury Stock" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureShareIncentivePlanAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Cash Flows [Abstract]" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Income And Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Stockholders Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [ "r142", "r143", "r144", "r169", "r615" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyConsolidatedStatementsOfComprehensiveLossIncomeDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfCashFlowsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyStatementsOfOperationsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DocumentDocumentAndEntityInformation", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONSParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation": { "auth_ref": [ "r37", "r38", "r327", "r334" ], "lang": { "en-us": { "role": { "documentation": "Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).", "label": "Stock Issued During Period Shares Share Based Compensation", "terseLabel": "Share-based compensation, shares" } } }, "localname": "StockIssuedDuringPeriodSharesShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchaseProgramAuthorizedAmount1": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of stock repurchase plan authorized.", "label": "Stock Repurchase Program Authorized Amount1", "terseLabel": "Authorized amount under share repurchase program" } } }, "localname": "StockRepurchaseProgramAuthorizedAmount1", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockRepurchasedDuringPeriodShares": { "auth_ref": [ "r37", "r38", "r327", "r334" ], "lang": { "en-us": { "role": { "documentation": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Stock Repurchased During Period Shares", "negatedLabel": "Share repurchase, shares", "verboseLabel": "Number of shares repurchased" } } }, "localname": "StockRepurchasedDuringPeriodShares", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedDuringPeriodValue": { "auth_ref": [ "r37", "r38", "r327", "r334" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Stock Repurchased During Period Value", "negatedLabel": "Share repurchase" } } }, "localname": "StockRepurchasedDuringPeriodValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r38", "r42", "r43", "r137", "r212", "r227", "r523", "r576" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10040.0, "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", "totalLabel": "Total Sunlands Technology Group shareholders\u2019 deficit" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest": { "auth_ref": [ "r2", "r3", "r86", "r137", "r142", "r143", "r144", "r147", "r154", "r227", "r235", "r334", "r414", "r415", "r416", "r449", "r450", "r463", "r464", "r493", "r507", "r523", "r534", "r535", "r539", "r677", "r678", "r746" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10030.0, "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": "Balances", "periodStartLabel": "Balances", "totalLabel": "TOTAL SHAREHOLDERS\u2019 DEFICIT" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]", "terseLabel": "SHAREHOLDERS\u2019 DEFICIT" } } }, "localname": "StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "stringItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Supplemental Cash Flow Information [Abstract]", "terseLabel": "Supplemental disclosure of cash flow information:" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCASHFLOWS" ], "xbrltype": "stringItemType" }, "us-gaap_TaxPeriodAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information about the period subject to enacted tax laws.", "label": "Tax Period [Axis]", "terseLabel": "Tax Period" } } }, "localname": "TaxPeriodAxis", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_TaxPeriodDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Identified tax period.", "label": "Tax Period [Domain]", "terseLabel": "Tax Period" } } }, "localname": "TaxPeriodDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TaxYear2016Member": { "auth_ref": [ "r434" ], "lang": { "en-us": { "role": { "documentation": "Identified as tax year 2016.", "label": "Tax Year2016 [Member]", "terseLabel": "2016" } } }, "localname": "TaxYear2016Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TaxYear2021Member": { "auth_ref": [ "r434" ], "lang": { "en-us": { "role": { "documentation": "Identified as tax year 2021.", "label": "Tax Year2021 [Member]", "terseLabel": "2021" } } }, "localname": "TaxYear2021Member", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": { "auth_ref": [ "r218", "r219", "r221", "r222", "r223", "r311", "r326", "r498", "r578", "r579", "r580", "r581", "r582", "r583", "r584", "r585", "r586", "r587", "r588", "r589", "r590", "r591", "r593", "r594", "r595", "r596", "r597", "r598", "r599", "r600", "r601", "r602", "r603", "r604", "r605", "r606", "r607", "r608", "r731", "r732", "r733", "r734", "r735", "r736", "r737" ], "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": "Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]", "terseLabel": "Financial Instruments" } } }, "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFairValueMeasurementScheduleOfAssetsMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockCommonValue": { "auth_ref": [ "r70", "r338", "r339" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS": { "order": 10090.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.", "label": "Treasury Stock Common Value", "negatedLabel": "Treasury stock" } } }, "localname": "TreasuryStockCommonValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETS" ], "xbrltype": "monetaryItemType" }, "us-gaap_TreasuryStockMember": { "auth_ref": [ "r66", "r338" ], "lang": { "en-us": { "role": { "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.", "label": "Treasury Stock [Member]", "terseLabel": "Treasury Stock" } } }, "localname": "TreasuryStockMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSDEFICIT" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockValue": { "auth_ref": [ "r66", "r338", "r339" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails": { "order": 10050.0, "parentTag": "us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.", "label": "Treasury Stock Value", "negatedLabel": "Treasury stock", "terseLabel": "Stock Repurchased During Period, Value" } } }, "localname": "TreasuryStockValue", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureFinancialStatementScheduleICondensedFinancialInformationOfParentCompanyBalanceSheetsDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrdinarySharesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TypeOfAdoptionMember": { "auth_ref": [ "r0", "r1", "r2", "r3", "r4", "r146", "r147", "r148", "r149", "r157", "r213", "r214", "r232", "r233", "r234", "r235", "r236", "r237", "r282", "r410", "r411", "r412", "r413", "r414", "r415", "r416", "r417", "r447", "r448", "r449", "r450", "r499", "r500", "r501", "r502", "r503", "r504", "r505", "r506", "r507", "r508", "r509", "r524", "r525", "r527", "r528", "r529", "r530", "r531", "r532", "r569", "r617", "r618", "r619", "r674", "r675", "r676", "r677", "r678", "r679", "r680", "r681", "r682", "r683", "r684", "r685", "r742", "r743", "r744", "r745", "r746" ], "lang": { "en-us": { "role": { "documentation": "Amendment to accounting standards.", "label": "Type Of Adoption [Member]", "terseLabel": "Accounting Standards Update" } } }, "localname": "TypeOfAdoptionMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ValueAddedTaxReceivable": { "auth_ref": [ "r72" ], "calculation": { "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails": { "order": 10040.0, "parentTag": "us-gaap_PrepaidExpenseAndOtherAssetsCurrent", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount as of the balance sheet date of value added taxes due either from customers arising from sales on credit terms, or as previously overpaid to tax authorities.", "label": "Value Added Tax Receivable", "terseLabel": "Prepaid and input VAT" } } }, "localname": "ValueAddedTaxReceivable", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsSummaryOfPrepaidExpensesAndOtherCurrentAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss": { "auth_ref": [ "r490" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of income (loss) from operations derived by the reporting entity during the period from the Variable Interest Entity (VIE).", "label": "Variable Interest Entity Activity Between V I E And Entity Operating Income Or Loss", "terseLabel": "Net income/(loss)" } } }, "localname": "VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_VariableInterestEntityActivityBetweenVIEAndEntityRevenues": { "auth_ref": [ "r490" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of income between the reporting entity and the Variable Interest Entity (VIE).", "label": "Variable Interest Entity Activity Between V I E And Entity Revenues", "terseLabel": "Net revenues" } } }, "localname": "VariableInterestEntityActivityBetweenVIEAndEntityRevenues", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "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/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableInterestEntityPrimaryBeneficiaryMember": { "auth_ref": [ "r469", "r470", "r479", "r480", "r481" ], "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": "VIEs" } } }, "localname": "VariableInterestEntityPrimaryBeneficiaryMember", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.sunlands.com/20211231/taxonomy/role/DisclosureSignificantAccountingPoliciesSummaryFinancialInformationOfViesAndTheirSubsidiariesDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDBALANCESHEETSParenthetical" ], "xbrltype": "domainItemType" }, "us-gaap_VariableInterestEntityVIEActivitiesOfVIE": { "auth_ref": [ "r472", "r482", "r486", "r488", "r489" ], "lang": { "en-us": { "role": { "documentation": "Description of the transactions or business conducted by the Variable Interest Entity (VIE), including how the VIE is financed.", "label": "Variable Interest Entity V I E Activities Of V I E", "terseLabel": "Principal activities" } } }, "localname": "VariableInterestEntityVIEActivitiesOfVIE", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureOrganizationAndBasisOfPresentationSummaryOfMajorSubsidiariesViesAndViesSubsidiariesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableLeaseCost": { "auth_ref": [ "r561", "r566" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.", "label": "Variable Lease Cost", "terseLabel": "Variable lease cost" } } }, "localname": "VariableLeaseCost", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureLeasesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).", "label": "Weighted Average Number Of Share Outstanding Basic And Diluted", "terseLabel": "Basic and diluted" } } }, "localname": "WeightedAverageNumberOfShareOutstandingBasicAndDiluted", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Weighted Average Number Of Shares Outstanding [Abstract]", "terseLabel": "Weighted average shares used in calculating net (loss)/income per ordinary share:", "verboseLabel": "Denominator:" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingAbstract", "nsuri": "http://fasb.org/us-gaap/2021-01-31", "presentation": [ "http://www.sunlands.com/20211231/taxonomy/role/DisclosureNetLossIncomePerShareScheduleOfCalculationOfNetLossPerShareDetails", "http://www.sunlands.com/20211231/taxonomy/role/StatementCONSOLIDATEDSTATEMENTSOFOPERATIONS" ], "xbrltype": "stringItemType" } }, "unitCount": 16 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "105", "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "105", "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765" }, "r100": { "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=123367319&loc=SL114868664-224227" }, "r101": { "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=123367319&loc=SL114868664-224227" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227" }, "r103": { "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=123367319&loc=SL114868664-224227" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3367-108585" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3000-108585" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "21D", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=SL94080555-108585" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3521-108585" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)(3)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123570139&loc=d3e3044-108585" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4273-108586" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=123431023&loc=SL98516268-108586" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)(6)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18726-107790" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=123372394&loc=d3e18823-107790" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(d))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(e)(3)(ii))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r137": { "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" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r139": { "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" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765" }, "r140": { "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" }, "r141": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21914-107793" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21930-107793" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124436220&loc=d3e21711-107793" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(2)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(3)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(4)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 11.M.Q2)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=122038215&loc=d3e31137-122693" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1252-109256" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1278-109256" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6801-107765" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "55", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e2626-109256" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=SL5780133-109256" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=125511455&loc=d3e1337-109256" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537" }, "r168": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6911-107765" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=125520817&loc=d3e70229-108054" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055" }, "r172": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "275", "URI": "http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592" }, "r174": { "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" }, "r175": { "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" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=124098289&loc=d3e6935-107765" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(j)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(24))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8813-108599" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "26", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "31", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "105", "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(25))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "34", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "42", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 201.5-02(26))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "280", "URI": "http://asc.fasb.org/topic&trid=2134510" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=124259787&loc=d3e4647-111522" }, "r212": { "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=122038336&loc=d3e74512-122707" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=124402435&loc=SL124402458-218513" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=124402435&loc=SL124402458-218513" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=124260329&loc=d3e26626-111562" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "8A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=124260329&loc=SL6284422-111562" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=123581744&loc=d3e27232-111563" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=123581744&loc=SL120269820-111563" }, "r22": { "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" }, "r220": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "321", "URI": "http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "321", "URI": "http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "321", "URI": "http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714" }, "r224": { "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" }, "r225": { "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" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(b)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r227": { "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" }, "r228": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "323", "URI": "http://asc.fasb.org/topic&trid=2196965" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL120254519-210437" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(10))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL120320025-210437" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL120320025-210437" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(3)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(4)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=122640432&loc=SL121648383-210437" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(11))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124269663&loc=SL82922895-210455" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455" }, "r247": { "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" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "340", "URI": "http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "340", "URI": "http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316" }, "r25": { "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" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Topic": "340", "URI": "http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "340", "URI": "http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320" }, "r252": { "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" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r257": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(2)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(3)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r261": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "350", "URI": "http://asc.fasb.org/topic&trid=2144416" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226317&loc=d3e202-110218" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=123364984&loc=d3e1205-110223" }, "r264": { "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" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r268": { "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" }, "r269": { "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" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.CC)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742" }, "r271": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "360", "URI": "http://asc.fasb.org/topic&trid=2155823" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r273": { "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" }, "r274": { "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" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "440", "URI": "http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "440", "URI": "http://asc.fasb.org/extlink&oid=123406679&loc=d3e25336-109308" }, "r277": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r278": { "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" }, "r279": { "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" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(15))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123465755&loc=SL6230698-112601" }, "r282": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S65", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359872&loc=SL124427846-239511" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(4)(i))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(4)(ii))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(4)(iii)(A))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(4)(iii))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(4)(iv))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-01(a)(5))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-02(a)(4)(i))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(16))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-02(a)(4)(iii)(A))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-02(a)(4)(iii)(B))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-02(a)(4)(iv))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.13-02(a)(5))", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r295": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(f)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "105", "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695" }, "r30": { "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" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "1D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "1D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "1D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "1E", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "1E", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "1E", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "1F", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "1F", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "1F", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611" }, "r31": { "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" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "1F", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "1I", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "69B", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "69C", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "69E", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495743-112612" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "69F", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=123466577&loc=SL123495745-112612" }, "r316": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "470", "URI": "http://asc.fasb.org/topic&trid=2208564" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(CFRR 211.02)", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21553-112644" }, "r32": { "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" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21484-112644" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(23))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21488-112644" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21506-112644" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21521-112644" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=123467817&loc=d3e21538-112644" }, "r334": { "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" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 4.F)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.F)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(1)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(2)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130561-203045" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130563-203045" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130563-203045" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130564-203045" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130566-203045" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130566-203045" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130566-203045" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130566-203045" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045" }, "r361": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "27", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130611-203046-203046" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r367": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r368": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r369": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=123410239&loc=SL49130690-203046-203046" }, "r372": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r373": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "710", "URI": "http://asc.fasb.org/topic&trid=2127225" }, "r374": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "712", "URI": "http://asc.fasb.org/topic&trid=2197446" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920" }, "r376": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920" }, "r377": { "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=123447040&loc=d3e1928-114920" }, "r378": { "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=123447040&loc=d3e1928-114920" }, "r379": { "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=123447040&loc=d3e1928-114920" }, "r38": { "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" }, "r380": { "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=123447040&loc=d3e1928-114920" }, "r381": { "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=123447040&loc=d3e1928-114920" }, "r382": { "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=123447040&loc=d3e1928-114920" }, "r383": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921" }, "r384": { "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" }, "r385": { "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" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(f)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947" }, "r387": { "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" }, "r388": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r389": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=123468992&loc=d3e4534-113899" }, "r39": { "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" }, "r390": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r391": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r392": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r393": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r394": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r395": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(f(1))", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r396": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r397": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r398": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r399": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "105", "URI": "http://asc.fasb.org/extlink&oid=124434974&loc=SL124442142-165695" }, "r40": { "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" }, "r400": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r401": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r402": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r403": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r404": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r405": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r406": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r407": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r408": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r409": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r41": { "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" }, "r410": { "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" }, "r411": { "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" }, "r412": { "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" }, "r413": { "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" }, "r414": { "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" }, "r415": { "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" }, "r416": { "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" }, "r417": { "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" }, "r418": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.F)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809" }, "r419": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=122142933&loc=d3e11149-113907" }, "r42": { "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" }, "r420": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=122142933&loc=d3e11178-113907" }, "r421": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "718", "URI": "http://asc.fasb.org/topic&trid=2228938" }, "r422": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6419918&loc=d3e35281-107843" }, "r423": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "35", "Subparagraph": "(a)", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848" }, "r424": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "35", "Subparagraph": "(b)", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848" }, "r425": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "730", "URI": "http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373" }, "r426": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e32247-109318" }, "r427": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e32280-109318" }, "r428": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e31917-109318" }, "r429": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123427490&loc=d3e31931-109318" }, "r43": { "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" }, "r430": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32672-109319" }, "r431": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319" }, "r432": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319" }, "r433": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319" }, "r434": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319" }, "r435": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319" }, "r436": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32840-109319" }, "r437": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319" }, "r438": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319" }, "r439": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319" }, "r44": { "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" }, "r440": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319" }, "r441": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32847-109319" }, "r442": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319" }, "r443": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319" }, "r444": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319" }, "r445": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32632-109319" }, "r446": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319" }, "r447": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277" }, "r448": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277" }, "r449": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)(2)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(7))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r450": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)(3)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123459177&loc=SL121830611-158277" }, "r451": { "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=122134291&loc=d3e330036-122817" }, "r452": { "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=122134291&loc=d3e330036-122817" }, "r453": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.Fact.4)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817" }, "r454": { "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=122134291&loc=d3e330215-122817" }, "r455": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=123586238&loc=d3e38679-109324" }, "r456": { "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" }, "r457": { "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" }, "r458": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r459": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463" }, "r46": { "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" }, "r460": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463" }, "r461": { "Name": "Accounting Standards Codification", "Paragraph": "38", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=123410050&loc=d3e5504-128473" }, "r462": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=d3e5283-111683" }, "r463": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4568447-111683" }, "r464": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4568740-111683" }, "r465": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4569616-111683" }, "r466": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4569643-111683" }, "r467": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4613674-111683" }, "r468": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123454820&loc=SL4569655-111683" }, "r469": { "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" }, "r47": { "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" }, "r470": { "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" }, "r471": { "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" }, "r472": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c,d)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6228967-111685" }, "r473": { "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" }, "r474": { "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" }, "r475": { "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" }, "r476": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r477": { "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" }, "r478": { "Name": "Accounting Standards Codification", "Paragraph": "2AA", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "a", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6759068-111685" }, "r479": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685" }, "r48": { "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" }, "r480": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685" }, "r481": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685" }, "r482": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5728-111685" }, "r483": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5728-111685" }, "r484": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5728-111685" }, "r485": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685" }, "r486": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685" }, "r487": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685" }, "r488": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685" }, "r489": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "b", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r490": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "d", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685" }, "r491": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685" }, "r492": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=123419778&loc=SL6228884-111685" }, "r493": { "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" }, "r494": { "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" }, "r495": { "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" }, "r496": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "810", "URI": "http://asc.fasb.org/topic&trid=2197479" }, "r497": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121483254&loc=SL120254523-199619" }, "r498": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(f)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123477628&loc=d3e90205-114008" }, "r499": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(a)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-04(Schedule I))", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=120391182&loc=d3e5864-122674" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r500": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(a)(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r501": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(a)(3)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r502": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(b)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r503": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(b)(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r504": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(c)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r505": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r506": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(e)(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r507": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(e)(3)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r508": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(e)(4)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r509": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(f)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=123482062&loc=SL123482106-238011" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r510": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r511": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r512": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r513": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)(1)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r514": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r515": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258" }, "r516": { "Name": "Accounting Standards Codification", "Paragraph": "2C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=SL7498348-110258" }, "r517": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258" }, "r518": { "Name": "Accounting Standards Codification", "Paragraph": "6A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258" }, "r519": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "60", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=7493716&loc=d3e21868-110260" }, "r52": { "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" }, "r520": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13279-108611" }, "r521": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611" }, "r522": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611" }, "r523": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612" }, "r524": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL120254526-165497" }, "r525": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL120254526-165497" }, "r526": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL120254526-165497" }, "r527": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497" }, "r528": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497" }, "r529": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497" }, "r53": { "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" }, "r530": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL121967933-165497" }, "r531": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL122642865-165497" }, "r532": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=123597120&loc=SL122642865-165497" }, "r533": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=123444420&loc=d3e33268-110906" }, "r534": { "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" }, "r535": { "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" }, "r536": { "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" }, "r537": { "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" }, "r538": { "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" }, "r539": { "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" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a),20,24)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r540": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32618-110901" }, "r541": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521" }, "r542": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "830", "URI": "http://asc.fasb.org/topic&trid=2175825" }, "r543": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r544": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=124435984&loc=d3e28541-108399" }, "r545": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399" }, "r546": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399" }, "r547": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629" }, "r548": { "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" }, "r549": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=123415192&loc=d3e39927-112707" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(b),22(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r550": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=123406913&loc=d3e41499-112717" }, "r551": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123341672&loc=SL77916155-209984" }, "r552": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(j)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123341672&loc=SL77916155-209984" }, "r553": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123341672&loc=SL77916155-209984" }, "r554": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123341672&loc=SL120154346-209984" }, "r555": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977" }, "r556": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977" }, "r557": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123391704&loc=SL77918643-209977" }, "r558": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918666-209980" }, "r559": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980" }, "r56": { "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" }, "r560": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980" }, "r561": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980" }, "r562": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980" }, "r563": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980" }, "r564": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980" }, "r565": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980" }, "r566": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971" }, "r567": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r568": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "25", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=123408481&loc=SL77919140-209958" }, "r569": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "848", "URI": "http://asc.fasb.org/extlink&oid=122150657&loc=SL122150809-237846" }, "r57": { "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" }, "r570": { "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" }, "r571": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864" }, "r572": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=124437977&loc=d3e55792-112764" }, "r573": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=124433192&loc=d3e56071-112765" }, "r574": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765" }, "r575": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=124433192&loc=SL2890621-112765" }, "r576": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "852", "URI": "http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766" }, "r577": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "855", "URI": "http://asc.fasb.org/extlink&oid=6842918&loc=SL6314020-165662" }, "r578": { "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" }, "r579": { "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" }, "r58": { "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" }, "r580": { "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" }, "r581": { "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" }, "r582": { "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" }, "r583": { "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" }, "r584": { "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" }, "r585": { "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" }, "r586": { "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" }, "r587": { "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" }, "r588": { "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" }, "r589": { "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" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.21)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r590": { "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" }, "r591": { "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" }, "r592": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL6224234-111729" }, "r593": { "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" }, "r594": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746" }, "r595": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746" }, "r596": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746" }, "r597": { "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=125521744&loc=d3e122625-111746" }, "r598": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r599": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r6": { "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" }, "r60": { "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" }, "r600": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r601": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(4)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r602": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(5)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r603": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(6)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r604": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(7)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r605": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(b)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r606": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r607": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r608": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=125521744&loc=d3e122739-111746" }, "r609": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "910", "URI": "http://asc.fasb.org/extlink&oid=123353855&loc=SL119991595-234733" }, "r61": { "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" }, "r610": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Subparagraph": "(b)", "Topic": "912", "URI": "http://asc.fasb.org/extlink&oid=123371682&loc=d3e55415-109406" }, "r611": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "730", "Topic": "912", "URI": "http://asc.fasb.org/extlink&oid=6472174&loc=d3e58812-109433" }, "r612": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "350", "Subparagraph": "(a)", "Topic": "920", "URI": "http://asc.fasb.org/extlink&oid=120155617&loc=SL120155628-234783" }, "r613": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "350", "Subparagraph": "(b)", "Topic": "920", "URI": "http://asc.fasb.org/extlink&oid=120155617&loc=SL120155628-234783" }, "r614": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "350", "Subparagraph": "(a)", "Topic": "920", "URI": "http://asc.fasb.org/extlink&oid=120155617&loc=SL120155638-234783" }, "r615": { "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" }, "r616": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "926", "URI": "http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959" }, "r617": { "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" }, "r618": { "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" }, "r619": { "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" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.24)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r620": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "928", "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004" }, "r621": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "20", "Topic": "940", "URI": "http://asc.fasb.org/extlink&oid=123384075&loc=d3e41242-110953" }, "r622": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "940", "URI": "http://asc.fasb.org/subtopic&trid=2176304" }, "r623": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(1)(a))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r624": { "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" }, "r625": { "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" }, "r626": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r627": { "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" }, "r628": { "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" }, "r629": { "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" }, "r63": { "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" }, "r630": { "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" }, "r631": { "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" }, "r632": { "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" }, "r633": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(13)(g))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r634": { "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" }, "r635": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r636": { "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" }, "r637": { "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" }, "r638": { "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" }, "r639": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.9)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.28,29)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r640": { "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" }, "r641": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/subtopic&trid=2209399" }, "r642": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=124429447&loc=SL124453093-239630" }, "r643": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "(c)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823" }, "r644": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "(d)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823" }, "r645": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823" }, "r646": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(15)(b)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r647": { "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" }, "r648": { "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" }, "r649": { "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" }, "r65": { "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" }, "r650": { "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" }, "r651": { "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" }, "r652": { "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" }, "r653": { "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" }, "r654": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r655": { "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" }, "r656": { "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" }, "r657": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r658": { "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" }, "r659": { "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" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29,30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r660": { "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" }, "r661": { "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" }, "r662": { "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" }, "r663": { "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" }, "r664": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6481654&loc=d3e11214-158414" }, "r665": { "Name": "Accounting Standards Codification", "Paragraph": "2B", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124505477&loc=SL117422543-158416" }, "r666": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124505477&loc=d3e11332-158416" }, "r667": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124505477&loc=d3e11332-158416" }, "r668": { "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" }, "r669": { "Name": "Accounting Standards Codification", "Paragraph": "7A", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(d)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439" }, "r67": { "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" }, "r670": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117783719-158441" }, "r671": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117783719-158441" }, "r672": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(c)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117783719-158441" }, "r673": { "Name": "Accounting Standards Codification", "Paragraph": "29F", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124504033&loc=SL117819544-158441" }, "r674": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r675": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r676": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(e)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r677": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(f)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r678": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(f)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r679": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.3(a)(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r680": { "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=124501264&loc=SL117420844-207641" }, "r681": { "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=124501264&loc=SL117420844-207641" }, "r682": { "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=124501264&loc=SL117420844-207641" }, "r683": { "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=124501264&loc=SL117420844-207641" }, "r684": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(h)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r685": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(h)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641" }, "r686": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "825", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=123600520&loc=SL75241803-196195" }, "r687": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.6-04(16))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401414&loc=d3e603758-122996" }, "r688": { "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=122147990&loc=d3e611197-123010" }, "r689": { "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=122147990&loc=d3e611197-123010" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.3(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r690": { "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=122147990&loc=d3e611197-123010" }, "r691": { "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=122147990&loc=d3e611197-123010" }, "r692": { "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=122147990&loc=d3e611197-123010" }, "r693": { "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=122147990&loc=d3e611197-123010" }, "r694": { "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=122147990&loc=d3e611197-123010" }, "r695": { "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=122147990&loc=d3e611197-123010" }, "r696": { "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=122147990&loc=d3e611197-123010" }, "r697": { "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=122147990&loc=SL120429264-123010" }, "r698": { "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=122147990&loc=SL120429264-123010" }, "r699": { "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=122147990&loc=d3e611379-123010" }, "r7": { "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" }, "r70": { "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" }, "r700": { "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=122147990&loc=d3e611379-123010" }, "r701": { "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=122147990&loc=d3e611379-123010" }, "r702": { "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=122147990&loc=d3e611379-123010" }, "r703": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "946", "URI": "http://asc.fasb.org/subtopic&trid=2324412" }, "r704": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "310", "Subparagraph": "(SX 210.12-29(Footnote 4))", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014" }, "r705": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "310", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=123364037&loc=d3e3115-115594" }, "r706": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "440", "Subparagraph": "(a)", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491277&loc=d3e6429-115629" }, "r707": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Subparagraph": "(d)", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916" }, "r708": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916" }, "r709": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916" }, "r71": { "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" }, "r710": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column B))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r711": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column C))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r712": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column D))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r713": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column E))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r714": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column F))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r715": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column G))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r716": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column H))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r717": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Column I))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r718": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Footnote 2))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r719": { "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" }, "r72": { "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" }, "r720": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "310", "Subparagraph": "(c)", "Topic": "976", "URI": "http://asc.fasb.org/extlink&oid=6497875&loc=d3e22274-108663" }, "r721": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "310", "Subparagraph": "(b)", "Topic": "978", "URI": "http://asc.fasb.org/extlink&oid=123360121&loc=d3e27327-108691" }, "r722": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "985", "URI": "http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756" }, "r723": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12" }, "r724": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r725": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r726": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r727": { "Name": "Form 10-K", "Number": "249", "Publisher": "SEC", "Section": "310" }, "r728": { "Name": "Form 20-F", "Number": "249", "Publisher": "SEC", "Section": "220", "Subsection": "f" }, "r729": { "Name": "Form 40-F", "Number": "249", "Publisher": "SEC", "Section": "240", "Subsection": "f" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.9)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r730": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1" }, "r731": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(a)", "Publisher": "SEC", "Section": "1402" }, "r732": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(b)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(1)" }, "r733": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(b)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(2)" }, "r734": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(b)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(3)" }, "r735": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(c)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(2)(i)" }, "r736": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(c)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(2)(ii)" }, "r737": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(c)", "Publisher": "SEC", "Section": "1402", "Subparagraph": "(2)(iii)" }, "r738": { "Name": "Regulation S-K (SK)", "Number": "229", "Paragraph": "(b)", "Publisher": "SEC", "Section": "1403" }, "r739": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580" }, "r740": { "Name": "Securities Act", "Number": "230", "Publisher": "SEC", "Section": "405" }, "r741": { "Name": "Securities Act", "Number": "7A", "Publisher": "SEC", "Section": "B", "Subsection": "2" }, "r742": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "848" }, "r743": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "848" }, "r744": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "848" }, "r745": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)(3)(iii)(01)", "Topic": "848" }, "r746": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)(3)(iii)(03)", "Topic": "848" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669646-108580" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e681-108580" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580" }, "r8": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/subtopic&trid=2122178" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669619-108580" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=SL7669625-108580" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124509347&loc=d3e557-108580" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL116659661-227067" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(210.5-03(11))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227" }, "r89": { "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=123367319&loc=SL114868664-224227" }, "r9": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "205", "URI": "http://asc.fasb.org/topic&trid=2122149" }, "r90": { "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=123367319&loc=SL114868664-224227" }, "r91": { "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=123367319&loc=SL114868664-224227" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227" }, "r93": { "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=123367319&loc=SL114868664-224227" }, "r94": { "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=123367319&loc=SL114868664-224227" }, "r95": { "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=123367319&loc=SL114868664-224227" }, "r96": { "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=123367319&loc=SL114868664-224227" }, "r97": { "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=123367319&loc=SL114868664-224227" }, "r98": { "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=123367319&loc=SL114868664-224227" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.1,2)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227" } }, "version": "2.1" }