| Standard label: | Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments |
| Name: | us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsOtherLiabilityAdjustments |
| Documentation: | Net amount of other increases or decreases to the liability for guaranteed minimum benefits on long-duration contracts occurring during the period. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LiabilitiesForGuaranteesOnLongDurationContractsOtherLiabilityAdjustments |
| Label | Role | Language |
| Liabilities for Guarantees on Long-Duration Contracts, Other Liability Adjustments | http://www.xbrl.org/2003/role/label | 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 |