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Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Income Tax Expense (Benefit) |  | $ (56) | $ (91) | $ (181) | $ (247)
Net income |  | 156 | 287 | 569 | 744
Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Investment related gains (losses), net |  | (68) | (36) | (356) | (132)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |  | (85) | (41) | (389) | (140)
Income Tax Expense (Benefit) |  | 18 | 13 | 79 | 36
Net income |  | (67) | (28) | (310) | (104)
Amortization Of Unrealized Pension And Postretirement Benefits [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Prior service cost | [1] | 0 | 0 | 1 | 1
Actuarial gains/(losses) | [1] | (1) | (1) | (2) | (2)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest |  | (1) | (1) | (1) | (1)
Income Tax Expense (Benefit) |  | 0 | 0 | 0 | 0
Net income |  | (1) | (1) | (1) | (1)
Amounts Reclassified From AOCI [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Net income |  | (68) | (29) | (311) | (105)
Currency Swap [Member] | Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [2] | (20) | (8) | (42) | (15)
Interest Rate Options [Member] | Unrealized Appreciation Depreciation Of Investments [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] |  |  |  |  |
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [2] | $ 3 | $ 3 | $ 9 | $ 7
[1] | This AOCI component is included in the computation of the net periodic pension cost. See Note 14 – “Employee Benefit Plans” for additional details.
[2] | See Note 11 – “Derivative Instruments” for additional information on cash flow hedges.

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