Product and Geographic Information - Schedule of Revenue from External Customers by Geographic Areas (Details) - Retirement Services - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total premiums and deposits, net of ceded | $ 66,438 | $ 46,434 |
| United States | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total premiums and deposits, net of ceded | 45,207 | 34,646 |
| Bermuda | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total premiums and deposits, net of ceded | $ 21,231 | $ 11,788 |