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Business and Basis of Presentation (Market Risk Benefit, Activity) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability | $ 3,486 | $ 5,064 | $ 9,231 | $ 19,852 |
As Previously Reported |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  |  | $ 18,879
AIR to be reclassified to MRB, prior to transition, excluding amounts related to unrealized investment gains and losses |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 964 |
Total liability prior to transition |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 19,843 |
Change in reserve basis to MRB framework |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 220 |
MRB after transition, at current NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 20,063 |
Less: Reinsured MRB |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 211 |
MRB after transition, at contract inception NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 21,651 |
Cumulative change in NPR |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 1,588 |
Retirement Strategies | Individual Variable |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability | $ 3,422 | $ 4,963 | $ 9,061 | 19,473 |
Retirement Strategies | Individual Variable | As Previously Reported |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  |  | 18,731
Retirement Strategies | Individual Variable | AIR to be reclassified to MRB, prior to transition, excluding amounts related to unrealized investment gains and losses |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 824 |
Retirement Strategies | Individual Variable | Total liability prior to transition |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 19,555 |
Retirement Strategies | Individual Variable | Change in reserve basis to MRB framework |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 122 |
Retirement Strategies | Individual Variable | MRB after transition, at current NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 19,677 |
Retirement Strategies | Individual Variable | Less: Reinsured MRB |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 204 |
Retirement Strategies | Individual Variable | MRB after transition, at contract inception NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 21,259 |
Retirement Strategies | Individual Variable | Cumulative change in NPR |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 1,582 |
Other businesses |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 379 |
Other businesses | As Previously Reported |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  |  | $ 148
Other businesses | AIR to be reclassified to MRB, prior to transition, excluding amounts related to unrealized investment gains and losses |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 140 |
Other businesses | Total liability prior to transition |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 288 |
Other businesses | Change in reserve basis to MRB framework |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 98 |
Other businesses | MRB after transition, at current NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 386 |
Other businesses | Less: Reinsured MRB |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 7 |
Other businesses | MRB after transition, at contract inception NPR value |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | 392 |
Other businesses | Cumulative change in NPR |  |  |  |  |
Market Risk Benefit [Roll Forward] |  |  |  |  |
Net Liability |  |  |  | $ 6 |

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