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Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | $ 21,273,000,000 | $ 19,908,000,000 | $ 15,916,000,000
Net investment gains (losses) | (1,184,000,000) | (2,824,000,000) | (1,260,000,000)
Net derivative gains (losses) | (1,623,000,000) | (2,140,000,000) | (2,251,000,000)
Policyholder benefits and claims | (44,728,000,000) | (44,590,000,000) | (49,507,000,000)
Policyholder Account Balance, Interest Expense | 8,339,000,000 | 7,860,000,000 | 3,894,000,000
Operating Expenses | 13,017,000,000 | 12,710,000,000 | 11,859,000,000
Other Comprehensive Income (Loss), before Tax | (2,293,000,000) | 4,259,000,000 | (25,956,000,000)
Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 1,000,000 | 1,000,000 | 1,000,000
Net investment gains (losses) | (18,000,000) | (28,000,000) | 43,000,000
Policyholder benefits and claims | (26,000,000) | (26,000,000) | 54,000,000
Policyholder Account Balance, Interest Expense | 5,000,000 | 6,000,000 | 5,000,000
Operating Expenses | 0 | 0 | 0
Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 37,000,000 | 54,000,000 | 65,000,000
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment gains (losses) | (9,000,000) | 102,000,000 | 19,000,000
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 1,000,000 | 2,000,000 | 5,000,000
Other Comprehensive Income (Loss), before Tax | 191,000,000 | (1,811,000,000) | (85,000,000)
Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment gains (losses) | 0 | 5,000,000 | 0
Other Comprehensive Income (Loss), before Tax | 426,000,000 | 246,000,000 | 132,000,000
Foreign Exchange Forward [Member] | Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax |  | 226,000,000 | 85,000,000
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment gains (losses) | 0 | 5,000,000 | 0
Other Comprehensive Income (Loss), before Tax | 395,000,000 |  |
Interest rate contracts | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 33,000,000 | 50,000,000 | 59,000,000
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment gains (losses) | (5,000,000) | 90,000,000 | 41,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 0 | 0 | 4,000,000
Other Comprehensive Income (Loss), before Tax | (28,000,000) | (140,000,000) | (104,000,000)
Credit forwards [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment gains (losses) | 1,000,000 | 1,000,000 | 0
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 0 | 0 | 0
Other Comprehensive Income (Loss), before Tax | (1,000,000) | (1,000,000) | 0
Currency Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 4,000,000 | 4,000,000 | 6,000,000
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment gains (losses) | (794,000,000) | 558,000,000 | (609,000,000)
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 1,000,000 | 2,000,000 | 1,000,000
Other Comprehensive Income (Loss), before Tax | 789,000,000 | (564,000,000) | 602,000,000
Derivative [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Net investment gains (losses) | (6,000,000) | (20,000,000) | 46,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 0 | 0 | 0
Derivative [Member] | Interest rate swaps | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 3,000,000 | 9,000,000
Net investment gains (losses) | 0 | 0 | 0
Policyholder benefits and claims | 176,000,000 | 0 | 959,000,000
Policyholder Account Balance, Interest Expense | 59,000,000 | 29,000,000 | 254,000,000
Operating Expenses | 0 | 0 | 0
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 2,000,000 | 39,000,000 | 109,000,000
Net investment gains (losses) | (44,000,000) | (41,000,000) | (220,000,000)
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 90,000,000 | 20,000,000 | 0
Operating Expenses | 0 | 0 | 0
Fixed Maturity Securities | Interest rate swaps | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 3,000,000 | 9,000,000
Net investment gains (losses) | 0 | 0 | 0
Policyholder benefits and claims | 150,000,000 | (26,000,000) | (905,000,000)
Policyholder Account Balance, Interest Expense | 54,000,000 | 31,000,000 | 249,000,000
Operating Expenses | 0 | 0 | 0
Fixed Maturity Securities | Currency Swap [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 1,000,000 | 38,000,000 | 110,000,000
Net investment gains (losses) | 32,000,000 | 33,000,000 | 217,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 90,000,000 | 24,000,000 | 0
Operating Expenses | 0 | 0 | 0
Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment gains (losses) | 789,000,000 | (547,000,000) | 587,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 0 | 0 | 0
Other Comprehensive Income (Loss), before Tax | 0 | 0 | 0
Non-derivative [Domain] [Member] | Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | 31,000,000 | 20,000,000 | 47,000,000
Accumulated Other Comprehensive Income (Loss) | Credit forwards [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | 0 | 0 | 0
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | (95,000,000) | (1,215,000,000) | 1,784,000,000
Accumulated Other Comprehensive Income (Loss) | Interest rate swaps | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | (474,000,000) | 109,000,000 | (2,367,000,000)
Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 56,000,000 | 52,000,000 | 50,000,000
Derivative, Gain (Loss) on Derivative, Net | 2,414,000,000 | 3,234,000,000 | 3,401,000,000
Operating Expenses | 0 |  | 0
Not Designated as Hedging Instrument [Member] | Nonoperating Income (Expense) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Operating Expenses |  | 0 |
Interest Rate Risk [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 3,000,000
Derivative, Gain (Loss) on Derivative, Net | 794,000,000 | 979,000,000 | 3,967,000,000
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 2,000,000
Derivative, Gain (Loss) on Derivative, Net | 1,328,000,000 | 1,443,000,000 | 372,000,000
Credit derivatives — purchased | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | (3,000,000) | 17,000,000 | (75,000,000)
Credit derivatives — written | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | (47,000,000) | (135,000,000) | 92,000,000
Equity Market Risk [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 56,000,000 | 52,000,000 | 45,000,000
Derivative, Gain (Loss) on Derivative, Net | 519,000,000 | 1,296,000,000 | (673,000,000)
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Derivative, Gain (Loss) on Derivative, Net | (177,000,000) | (366,000,000) | (282,000,000)
Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 196,000,000 | 178,000,000 | 376,000,000
Net investment gains (losses) | 0 | 0 | 0
Net derivative gains (losses) | 629,000,000 | 1,055,000,000 | 1,029,000,000
Policyholder benefits and claims | 11,000,000 | (4,000,000) | (112,000,000)
Policyholder Account Balance, Interest Expense | 180,000,000 | 149,000,000 | 120,000,000
Other Comprehensive Income (Loss), before Tax | 0 | 0 | 0
Synthetic GICs [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative gains (losses) | 76,000,000 | 75,000,000 | 0
Net Embedded Derivatives |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative gains (losses) | 110,000,000 | (36,000,000) | 121,000,000
Embedded derivatives - other |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net derivative gains (losses) | (24,000,000) |  |
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 178,000,000 | 179,000,000 | 490,000,000
Net investment gains (losses) | (27,000,000) | 79,000,000 | 62,000,000
Net derivative gains (losses) |  | (2,140,000,000) |
Policyholder benefits and claims | 37,000,000 | 22,000,000 | (58,000,000)
Policyholder Account Balance, Interest Expense | (185,000,000) | (155,000,000) | (125,000,000)
Operating Expenses | 1,000,000 | 2,000,000 | 5,000,000
Other Comprehensive Income (Loss), before Tax | $ 617,000,000 | $ (1,565,000,000) | $ 47,000,000

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