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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | $ 233 | $ (76) | $ 33
Annuities Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 241 | 149 | 139
Retirement Plan Services Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 49 | 24 | 23
Life Insurance Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 122 | (33) | 47
Group Protection Segment [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | (33) | 11 | 63
Other Operations [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | (106) | (82) | (92)
Excluded Realized Gain (Loss) [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | (86) | (151) | (167)
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) | (9)
Benefit Ratio Unlocking [Member] |  |  |
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated [Abstract] |  |  |
Income tax expense (benefit) | 52 | 51 | 74
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) | (17)
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) | $ (28)

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