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Shareholders' Equity - Progression of the components of accumulated other comprehensive income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | $ (543) |  |
Other comprehensive income (loss), pretax | 283 | $ (839) | $ (1,460)
Other comprehensive income (loss), tax | (59) | 177 | 306
Other comprehensive income (loss) | 224 | (662) | (1,154)
AOCI ending balance | (319) | (543) |
Net unrealized gains (losses) on securities: |  |  |
Unrealized holding gains (losses) on securities arising during the period, pretax | 224 | (821) | (275)
Unrealized holding gains (losses) on securities arising during the period, tax | (48) | 174 | 57
Unrealized holding gains (losses) on securities arising during the period, after tax | (176) | 647 | 218
Reclassification adjustment for realized (gains) losses included in net earnings, pretax | 43 | 18 | (22)
Reclassification adjustment for realized (gains) losses included in net earnings, tax | (9) | (4) | 5
Reclassification adjustment for realized (gains) losses included in net earnings, after tax | 34 | 14 | (17)
Reclassification adjustment for unrealized gains (losses) on securities of subsidiaries sold, pretax |  |  | (1,119)
Reclassification adjustment for unrealized gains (losses) on securities of subsidiaries sold, tax |  |  | 235
Reclassification adjustment for unrealized gains (losses) on securities of subsidiaries sold, after tax | 0 | 0 | (884)
Total net unrealized gains (losses) on securities, pretax | 267 | (803) | (1,416)
Total net unrealized gains (losses) on securities, tax | (57) | 170 | 297
Total net unrealized gains (losses) on securities | 210 | (633) | (1,119)
Reclassification of Cash Flow Hedge Gain (Loss) [Abstract] |  |  |
Unrealized holding gains (losses) on cash flow hedges arising during the period, pretax | (11) | (37) | (1)
Unrealized holding gains (losses) on cash flow hedges arising during the period, tax | 2 | 8 | 0
Unrealized holding gains (losses) on cash flow hedges arising during the period, after tax | (9) | (29) | (1)
Reclassification adjustment for investment income included in net earnings from discontinued operations, pretax | 26 | 0 | (14)
Reclassification adjustment for investment income included in net earnings from discontinued operations, tax | (5) | 0 | 3
Reclassification adjustment for investment income included in net earnings from discontinued operations, after tax | 21 | 0 | (11)
Reclassification for unrealized gains on cash flow hedges of subsidiaries sold, pretax |  |  | (37)
Reclassification for unrealized gains on cash flow hedges of subsidiaries sold, tax |  |  | 8
Reclassification for unrealized gains on cash flow hedges of subsidiaries sold, after tax | 0 | 0 | (29)
Total net unrealized gains (losses) on cash flow hedges, pretax | 15 | (37) | (52)
Total net unrealized gains (losses) on cash flow hedges, tax | (3) | 8 | 11
Total net unrealized gains (losses) on cash flow hedges | 12 | (29) | (41)
Foreign currency translation adjustments, pretax | 2 | (1) | (2)
Foreign currency translation adjustments, tax | 1 | (1) | 0
Foreign currency translation adjustments | 3 | (2) | (2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent [Abstract] |  |  |
Unrealized holding gains (losses) on pension and OPRP arising during the period, pretax |  |  | (1)
Unrealized holding gains (losses) on pension and OPRP arising during the period, tax |  |  | 0
Unrealized holding gains (losses) on pension and OPRP arising during the period, after tax | (1) | 2 | (1)
Reclassification adjustment for pension settlement loss included in other expense in net earnings, pretax |  |  | 11
Reclassification adjustment for pension settlement loss included in other expense in net earnings, tax |  |  | (2)
Reclassification adjustment for pension settlement loss included in net earnings | 0 | 0 | 9
Total pension and OPRP adjustments, pretax | (1) | 2 | 10
Total pension and OPRP adjustments, tax | 0 | 0 | (2)
Total pension and OPRP adjustments | (1) | 2 | 8
Accumulated net investment gain (loss) attributable to parent |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | (497) | 136 | 1,255
AOCI ending balance | (287) | (497) | 136
Accumulated net gain (loss) on cash flow hedges attributable to parent |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | (29) | 0 | 41
AOCI ending balance | (17) | (29) | 0
Accumulated foreign currency adjustment attributable to parent |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | (20) | (18) | (16)
AOCI ending balance | (17) | (20) | (18)
Accumulated defined benefit plans adjustment attributable to parent |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | 3 | 1 | (7)
AOCI ending balance | 2 | 3 | 1
AOCI attributable to parent |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |
AOCI beginning balance | (543) | 119 | 1,273
Other comprehensive income (loss) | 224 | (662) | (1,154)
AOCI ending balance | $ (319) | $ (543) | $ 119

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