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Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | $ 19,908,000,000 | $ 15,916,000,000 | $ 21,395,000,000
Net investment gains (losses) | (2,824,000,000) | (1,260,000,000) | 1,543,000,000
Policyholder benefits and claims | (44,590,000,000) | (49,507,000,000) | (43,118,000,000)
Gain (Loss) on Derivative Instruments, Net, Pretax | (2,140,000,000) | (2,251,000,000) | (3,257,000,000)
Policyholder Account Balance, Interest Expense | (7,860,000,000) | (3,894,000,000) | (5,571,000,000)
Operating Expenses | 12,710,000,000 | 11,859,000,000 | 12,018,000,000
Other Comprehensive Income (Loss), before Tax | 4,259,000,000 | (25,956,000,000) | (3,282,000,000)
Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 1,000,000 | 1,000,000 | 6,000,000
Net investment gains (losses) | (28,000,000) | 43,000,000 | (6,000,000)
Policyholder benefits and claims | (26,000,000) | (54,000,000) | 45,000,000
Policyholder Account Balance, Interest Expense | (6,000,000) | (5,000,000) | (5,000,000)
Operating Expenses | 0 | 0 | 0
Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment income | 54,000,000 | 65,000,000 | 64,000,000
Net investment gains (losses) | 102,000,000 | 19,000,000 | 82,000,000
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 2,000,000 | 5,000,000 | 5,000,000
Other Comprehensive Income (Loss), before Tax | (1,811,000,000) | (85,000,000) | 137,000,000
Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment gains (losses) | 5,000,000 |  |
Other Comprehensive Income (Loss), before Tax | 246,000,000 | 132,000,000 | 139,000,000
Foreign Exchange Forward [Member] | Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax |  | 85,000,000 | 97,000,000
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment gains (losses) | 5,000,000 |  |
Other Comprehensive Income (Loss), before Tax | 226,000,000 |  |
Interest rate contracts | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment income | 50,000,000 | 59,000,000 | 56,000,000
Net investment gains (losses) | 90,000,000 | 41,000,000 | 84,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 0 | 4,000,000 | 3,000,000
Other Comprehensive Income (Loss), before Tax | (140,000,000) | (104,000,000) | (143,000,000)
Credit forwards [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment income | 0 | 0 | 0
Net investment gains (losses) | 1,000,000 | 0 | 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) | 0 | 0
Currency Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment income | 4,000,000 | 6,000,000 | 8,000,000
Net investment gains (losses) | 558,000,000 | (609,000,000) | (403,000,000)
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | 0 | 0 | 0
Operating Expenses | 2,000,000 | 1,000,000 | 2,000,000
Other Comprehensive Income (Loss), before Tax | (564,000,000) | 602,000,000 | 393,000,000
Derivative [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 0 | 0 | 0
Net investment gains (losses) | (20,000,000) | 46,000,000 | 0
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 | 3,000,000 | 9,000,000 | 6,000,000
Net investment gains (losses) | 0 | 0 | 0
Policyholder benefits and claims | 0 | 959,000,000 | 373,000,000
Policyholder Account Balance, Interest Expense | (29,000,000) | (254,000,000) | (83,000,000)
Operating Expenses | 0 | 0 | 0
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 39,000,000 | 109,000,000 | 50,000,000
Net investment gains (losses) | (41,000,000) | (220,000,000) | (191,000,000)
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | (20,000,000) | 0 | 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 | 3,000,000 | 9,000,000 | 6,000,000
Net investment gains (losses) | 0 | 0 | 0
Policyholder benefits and claims | (26,000,000) | 905,000,000 | (328,000,000)
Policyholder Account Balance, Interest Expense | (31,000,000) | (249,000,000) | (78,000,000)
Operating Expenses | 0 | 0 | 0
Fixed Maturity Securities | Currency Swap [Member] | Fair Value Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 38,000,000 | 110,000,000 | 44,000,000
Net investment gains (losses) | 33,000,000 | 217,000,000 | 185,000,000
Policyholder benefits and claims | 0 | 0 | 0
Policyholder Account Balance, Interest Expense | (24,000,000) | 0 | 0
Operating Expenses | 0 | 0 | 0
Foreign Currency Gain (Loss) [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 0 | 0 | 0
Net investment income | 0 | 0 | 0
Net investment gains (losses) | (547,000,000) | 587,000,000 | 401,000,000
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 | 20,000,000 | 47,000,000 | 42,000,000
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 | (14,000,000)
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | (1,215,000,000) | 1,784,000,000 | 500,000,000
Accumulated Other Comprehensive Income (Loss) | Interest rate swaps | Cash Flow Hedging [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Other Comprehensive Income (Loss), before Tax | 109,000,000 | (2,367,000,000) | (599,000,000)
Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 3,234,000,000 | 3,401,000,000 | 4,305,000,000
Net investment income | 52,000,000 | 50,000,000 | 54,000,000
Operating Expenses | 0 |  | 0
Not Designated as Hedging Instrument [Member] | Nonoperating Income (Expense) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Operating Expenses |  | 0 |
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 1,443,000,000 | 372,000,000 | 983,000,000
Net investment income | 0 | 2,000,000 | 0
Credit derivatives — purchased | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 17,000,000 | (75,000,000) | (9,000,000)
Net investment income | 0 | 0 | 0
Credit derivatives — written | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (135,000,000) | 92,000,000 | (41,000,000)
Net investment income | 0 | 0 | 0
Equity Market Risk [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 1,296,000,000 | (673,000,000) | 1,580,000,000
Net investment income | 52,000,000 | 45,000,000 | 56,000,000
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | (366,000,000) | (282,000,000) | (249,000,000)
Net investment income | 0 | 0 | 0
Interest Rate Risk [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, Gain (Loss) on Derivative, Net | 979,000,000 | 3,967,000,000 | 2,041,000,000
Net investment income | 0 | 3,000,000 | 2,000,000
Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 178,000,000 | 376,000,000 | 151,000,000
Net investment gains (losses) | 0 | 0 | 0
Policyholder benefits and claims | (4,000,000) | (112,000,000) | (166,000,000)
Gain (Loss) on Derivative Instruments, Net, Pretax | 1,055,000,000 | 1,029,000,000 | 993,000,000
Policyholder Account Balance, Interest Expense | (149,000,000) | (120,000,000) | (121,000,000)
Other Comprehensive Income (Loss), before Tax | 0 | 0 | 0
Net Embedded Derivatives |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Policyholder benefits and claims |  |  | 0
Gain (Loss) on Derivative Instruments, Net, Pretax | (36,000,000) | 121,000,000 | 55,000,000
Synthetic GICs [Member] | Not Designated as Hedging Instrument [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (Loss) on Derivative Instruments, Net, Pretax | 75,000,000 | 0 | 0
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net investment income | 179,000,000 | 490,000,000 | 167,000,000
Net investment gains (losses) | 79,000,000 | 62,000,000 | 76,000,000
Policyholder benefits and claims | 22,000,000 | (58,000,000) | (121,000,000)
Policyholder Account Balance, Interest Expense | 155,000,000 | 125,000,000 | 126,000,000
Operating Expenses | 2,000,000 | 5,000,000 | 5,000,000
Other Comprehensive Income (Loss), before Tax | $ (1,565,000,000) | $ 47,000,000 | $ 276,000,000

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