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Accumulated Other Comprehensive Income Loss - AOCI Rollforward (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | $ 15,327 |
Other comprehensive income (loss), net of tax | (148) | $ 587
Ending balance | 15,468 | 14,340
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (1,482) | (2,594)
OCI before reclassifications | (210) | 715
Amounts reclassified from AOCI | 7 | 27
OCI, before tax | (203) | 742
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 43 | (156)
Other comprehensive income (loss), net of tax | (160) | 586
Ending balance | (1,642) | (2,008)
AOCI, Gain (Loss), Debt Securities, Available-for-sale, with Allowance for Credit Loss, Parent |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (8) | (7)
OCI before reclassifications | 1 | (8)
Amounts reclassified from AOCI | 0 | 0
OCI, before tax | 1 | (8)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 0 | 2
Other comprehensive income (loss), net of tax | 1 | (6)
Ending balance | (7) | (13)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 21 | 40
OCI before reclassifications | 0 | 7
Amounts reclassified from AOCI | 0 | 3
OCI, before tax | 0 | 10
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 0 | (2)
Other comprehensive income (loss), net of tax | 0 | 8
Ending balance | 21 | 48
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 37 | 31
OCI before reclassifications | (1) | 3
Amounts reclassified from AOCI | 0 | 0
OCI, before tax | (1) | 3
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 0 | (1)
Other comprehensive income (loss), net of tax | (1) | 2
Ending balance | 36 | 33
AOCI, Liability for Future Policy Benefit, Parent |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | 25 | 35
OCI before reclassifications | 6 | (10)
Amounts reclassified from AOCI | 0 | 0
OCI, before tax | 6 | (10)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | (1) | 2
Other comprehensive income (loss), net of tax | 5 | (8)
Ending balance | 30 | 27
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (1,442) | (1,346)
OCI before reclassifications | 2 | 0
Amounts reclassified from AOCI | 7 | 6
OCI, before tax | 9 | 6
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | (2) | (1)
Other comprehensive income (loss), net of tax | 7 | 5
Ending balance | (1,435) | (1,341)
AOCI Attributable to Parent [Member] |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |
Beginning balance | (2,849) | (3,841)
OCI before reclassifications | (202) | 707
Amounts reclassified from AOCI | 14 | 36
OCI, before tax | (188) | 743
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent | 40 | (156)
Other comprehensive income (loss), net of tax | (148) | 587
Ending balance | $ (2,997) | $ (3,254)

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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