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Equity (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Investment income, net of related expenses |  |  |  |  |  |  |  |  |  | $ 3,138 | $ 2,575 | $ 2,520
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses) |  |  |  |  |  |  |  |  |  | (33) | 26 | 97
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax |  |  |  |  |  |  |  |  |  | (2) | 1 | 1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax |  |  |  |  |  |  |  |  |  | (27) | 2 | 23
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  | $ 57 | $ (34) | $ 482 | $ 186 | $ 169 | $ 285 | $ 195 | $ (96) | 691 | 553 | 1,132
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | (74) | (138) | (262)
Net Income (Loss) Attributable to Parent |  | $ 156 | $ (22) | $ 344 | $ 139 | $ 132 | $ 213 | $ 158 | $ (88) | 617 | 415 | $ 870
Amortization Of Unrealized Pension And Postretirement Benefits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax | [1] |  |  |  |  |  |  |  |  | 1 | (1) |
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax | [1] |  |  |  |  |  |  |  |  | (8) | (7) |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  |  |  |  |  |  |  |  |  | (7) | (6) |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | 1 | 1 |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  | (6) | (5) |
Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Other investment related gains (losses), net |  |  |  |  |  |  |  |  |  | 226 | (8) |
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses) | [2] |  |  |  |  |  |  |  |  | (44) | 54 |
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest |  |  |  |  |  |  |  |  |  | 175 | 42 |
Income Tax Expense (Benefit) |  |  |  |  |  |  |  |  |  | (38) | (12) |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  | 137 | 30 |
Amounts Reclassified From AOCI [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent |  |  |  |  |  |  |  |  |  | 131 | 25 |
Interest Rate Options [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [3] |  |  |  |  |  |  |  |  | (7) | (4) |
Currency Swap [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [3] |  |  |  |  |  |  |  |  | 0 | 0 |
Forward Contracts [Member] | Unrealized Gains Losses On Available For Sale Securities [Member] | Unrealized Appreciation Depreciation Of Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | [3] |  |  |  |  |  |  |  |  | $ 0 | $ 0 |
[1] | See Note 10 for information on employee benefit plans.
[2] | See Note 8 for information on deferred policy acquisition costs.
[3] | See Note 5 for information on cash flow hedges.

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