| Standard label: | Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield |
| Name: | us-gaap:LongDurationContractsAssumptionsByProductAndGuaranteeEstimatedAverageInvestmentYield |
| Documentation: | Estimated average rate of return on investments which is included in the calculation of the amount of the specified guaranteed benefit obligation as of the balance sheet date. |
| Object type: | cm:Concept |
| Data type: | Percent (num:percentItemType) |
| Period type: | As Of (instant) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LongDurationContractsAssumptionsByProductAndGuaranteeEstimatedAverageInvestmentYield |
| Label | Role | Language |
| Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 944 20 55 15 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 30 50 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 40 50 6 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 40 50 7 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 40 50 8 | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| FASB Accounting Standards Codification 944 80 50 1 (c) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |