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Future Contract Benefit (Summary of Reconciliation of Future Contract Benefits) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | $ 38,826 | $ 41,425
Traditional Life [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 3,509 | 4,150
Payout Annuities [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 2,004 | 2,512
Ul and Other [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 14,818 | 12,556
Group Protection Segment [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 5,462 | 5,936
Others [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 9,782 | 12,746
Other Operations [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 3,251 | 3,525
Protective [Member] | Others [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | 5,400 | 6,900
Swiss Re [Member] | Others [Member] |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |
Future contract benefits | $ 2,300 | $ 3,100

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