Reinsurance - GMIB Reinsurers (Details) - GMIB - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2022 |
Dec. 31, 2021 |
|
| Berkshire | Secured | GMIB Assets | Collateralization risk | ||
| Ceded Credit Risk [Line Items] | ||
| Concentration percentage | 100.00% | |
| Liberty Re (Bermuda) Ltd. | Secured | GMIB Assets | Collateralization risk | ||
| Ceded Credit Risk [Line Items] | ||
| Concentration percentage | 100.00% | |
| Other Contract [Member] | ||
| Ceded Credit Risk [Line Items] | ||
| GMIB recoverables | $ 546 | $ 601 |
| Other Contract [Member] | Berkshire | ||
| Ceded Credit Risk [Line Items] | ||
| GMIB recoverables | 257 | 283 |
| Other Contract [Member] | Sun Life Assurance Company of Canada | ||
| Ceded Credit Risk [Line Items] | ||
| GMIB recoverables | 151 | 167 |
| Other Contract [Member] | Liberty Re (Bermuda) Ltd. | ||
| Ceded Credit Risk [Line Items] | ||
| GMIB recoverables | $ 138 | $ 151 |