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Segment Information (Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated Net Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | $ (584) | $ 233 | $ (76)
Annuities Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 207 | 241 | 149
Retirement Plan Services Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 35 | 49 | 24
Life Insurance Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | (546) | 122 | (33)
Group Protection Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 27 | (33) | 11
Other Operations [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | (117) | (106) | (82)
Excluded Realized Gain (Loss) [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 28 | (86) | (151)
Gain (Loss) On Early Extinguishment Of Debt [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) |  | (2) | (3)
Benefit Ratio Unlocking [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | $ (218) | 52 | 51
Net Impact From the Tax Cuts And Jobs Act [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) |  |  | (37)
Acquisition And Integration Costs Related To Mergers And Acquisitions [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) |  | $ (4) | $ (5)

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