Derivatives Derivatives (Effects on the Consolidated Statement of Operations and Comprehensive Income (Loss)) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	$ (15,916,000,000)	$ (21,395,000,000)	$ (17,117,000,000)
Net investment gains (losses)	(1,262,000,000)	1,529,000,000	(110,000,000)
Policyholder benefits and claims	(50,612,000,000)	(43,954,000,000)	(41,461,000,000)
Gain (Loss) on Derivative Instruments, Net, Pretax	(2,372,000,000)	(2,228,000,000)	1,349,000,000
Policyholder Account Balance, Interest Expense	(3,692,000,000)	(5,538,000,000)	(5,214,000,000)
Operating Expenses	12,034,000,000	12,586,000,000	13,150,000,000
Other Comprehensive Income (Loss), before Tax	(48,879,000,000)	(9,012,000,000)	6,262,000,000
Nonperformance Risk [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	18,000,000	(17,000,000)	(10,000,000)
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Net investment income	(1,000,000)	(6,000,000)	0
Net investment gains (losses)	43,000,000	(6,000,000)	(42,000,000)
Policyholder benefits and claims	(60,000,000)	(50,000,000)	39,000,000
Policyholder Account Balance, Interest Expense	(1,000,000)	0	0
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	(65,000,000)	(64,000,000)	(40,000,000)
Net investment gains (losses)	19,000,000	82,000,000	207,000,000
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	5,000,000	5,000,000	4,000,000
Other Comprehensive Income (Loss), before Tax	(85,000,000)	137,000,000	(286,000,000)
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	132,000,000	139,000,000	16,000,000
Foreign Exchange Forward [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax		97,000,000	36,000,000
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	85,000,000
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	(59,000,000)	(56,000,000)	(36,000,000)
Net investment gains (losses)	41,000,000	84,000,000	121,000,000
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	4,000,000	3,000,000	2,000,000
Other Comprehensive Income (Loss), before Tax	(104,000,000)	(143,000,000)	(159,000,000)
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)	0	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	0	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	(6,000,000)	(8,000,000)	(4,000,000)
Net investment gains (losses)	(609,000,000)	(403,000,000)	851,000,000
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	1,000,000	2,000,000	2,000,000
Other Comprehensive Income (Loss), before Tax	602,000,000	393,000,000	(857,000,000)
Derivative [Member] | Fair Value 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)	46,000,000	0	(47,000,000)
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]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Net investment income	(9,000,000)	(6,000,000)	(10,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	1,187,000,000	456,000,000	(360,000,000)
Policyholder Account Balance, Interest Expense	(26,000,000)	0	0
Operating Expenses	0	0	0
Derivative [Member] | Currency Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Net investment income	(109,000,000)	(50,000,000)	(46,000,000)
Net investment gains (losses)	(220,000,000)	(191,000,000)	98,000,000
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Fixed Maturity Securities | Interest rate swaps | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Net investment income	(9,000,000)	(6,000,000)	(12,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	1,127,000,000	406,000,000	399,000,000
Policyholder Account Balance, Interest Expense	(27,000,000)	0	0
Operating Expenses	0	0	0
Fixed Maturity Securities | Currency Swap [Member] | Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Net investment income	(110,000,000)	(44,000,000)	(44,000,000)
Net investment gains (losses)	217,000,000	185,000,000	(93,000,000)
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	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)	587,000,000	401,000,000	(765,000,000)
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	47,000,000	42,000,000	(20,000,000)
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	(14,000,000)	(102,000,000)
Accumulated Other Comprehensive Income (Loss) | Currency Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	1,784,000,000	500,000,000	(445,000,000)
Accumulated Other Comprehensive Income (Loss) | Interest rate swaps | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax	(2,367,000,000)	(599,000,000)	1,277,000,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	3,559,000,000	3,959,000,000	(533,000,000)
Net investment income	(50,000,000)	(54,000,000)	(34,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	158,000,000	(349,000,000)	151,000,000
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Foreign Exchange [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	368,000,000	986,000,000	323,000,000
Net investment income	(2,000,000)	0	0
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	(4,000,000)	(2,000,000)	(3,000,000)
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Credit derivatives — purchased | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(75,000,000)	(9,000,000)	28,000,000
Net investment income	0	0	0
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Credit derivatives — written | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	92,000,000	(41,000,000)	106,000,000
Net investment income	0	0	0
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	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	(423,000,000)	1,280,000,000	1,151,000,000
Net investment income	(45,000,000)	(56,000,000)	(28,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	250,000,000	(302,000,000)	203,000,000
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Foreign Currency Gain (Loss) [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(282,000,000)	(249,000,000)	8,000,000
Net investment income	0	0	0
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	0	0	0
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	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	3,879,000,000	1,992,000,000	(2,149,000,000)
Net investment income	(3,000,000)	(2,000,000)	(6,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	88,000,000	49,000,000	55,000,000
Policyholder Account Balance, Interest Expense	0	0	0
Operating Expenses	0	0	0
Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	(376,000,000)	(151,000,000)	(217,000,000)
Net investment gains (losses)	0	0	0
Policyholder benefits and claims	(150,000,000)	(213,000,000)	(190,000,000)
Gain (Loss) on Derivative Instruments, Net, Pretax	1,015,000,000	984,000,000	926,000,000
Policyholder Account Balance, Interest Expense	(145,000,000)	(159,000,000)	(152,000,000)
Operating Expenses	0	0	0
Other Comprehensive Income (Loss), before Tax	0	0	0
Net Embedded Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Policyholder benefits and claims	0	0	0
Gain (Loss) on Derivative Instruments, Net, Pretax	172,000,000	747,000,000	(110,000,000)
Effects of Derivatives on Consolidated Statements of Operations and Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	(490,000,000)	(167,000,000)	(223,000,000)
Net investment gains (losses)	62,000,000	76,000,000	165,000,000
Policyholder benefits and claims	(248,000,000)	186,000,000	0
Policyholder Account Balance, Interest Expense	144,000,000	159,000,000	152,000,000
Operating Expenses	5,000,000	5,000,000	4,000,000
Other Comprehensive Income (Loss), before Tax	$ 47,000,000	$ 276,000,000	$ (270,000,000)