| Standard label: | Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net |
| Name: | us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityNet |
| Documentation: | Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, net of reinsurance recoverables, as of the balance sheet date. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitLiabilityNet |
| Label | Role | Language |
| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net | http://www.xbrl.org/2003/role/label | en-US |
| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net, Ending Balance | http://www.xbrl.org/2003/role/periodEndLabel | en-US |
| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net, Beginning Balance | http://www.xbrl.org/2003/role/periodStartLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 20 55 15 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 80 50 1 (d)(3) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |