Derivative Instruments - Summary of Notional and Fair Value of Derivative Assets and Liabilities (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Derivative [Line Items]
Derivative assets, fair value	$ 5,114		$ 5,114		$ 3,309
Derivative liabilities, fair value	1,753		1,753		1,646
Total derivative liabilities	9,923		9,923		7,410
Derivative Asset, Including Embedded Derivatives	(539)		(539)		(2,963)
Derivatives designated as hedges
Derivative [Line Items]
Derivative assets, fair value	1,017		1,017		1,164
Derivative liabilities, fair value	$ 1,156		$ 1,156		$ 1,159
Derivatives designated as hedges | Foreign currency swaps
Derivative [Line Items]
Notional Amount	7,460		7,460		6,677
Derivative assets, fair value	$ 659		$ 659		$ 747
Derivative liabilities, fair value	$ 189		$ 189		$ 154
Derivatives designated as hedges | Interest rate swaps
Derivative [Line Items]
Notional Amount	10,031		10,031		9,332
Derivative assets, fair value	$ 25		$ 25		$ 9
Derivative liabilities, fair value	$ 168		$ 168		$ 150
Derivatives designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	6,432		6,432		6,283
Derivative assets, fair value	$ 331		$ 331		$ 406
Derivative liabilities, fair value	$ 80		$ 80		$ 52
Derivatives designated as hedges | Cross Currency Interest Rate Contract
Derivative [Line Items]
Notional Amount	4,468		4,468		4,468
Derivative assets, fair value	$ 0		$ 0		$ 0
Derivative liabilities, fair value	719		719		803
Derivatives not designated as hedges
Derivative [Line Items]
Total derivative liabilities	8,767		8,767		6,251
Derivative Asset, Including Embedded Derivatives	$ (1,556)		$ (1,556)		$ (4,127)
Derivatives not designated as hedges | Foreign currency swaps
Derivative [Line Items]
Notional Amount	3,981		3,981		3,563
Derivative assets, fair value	$ 290		$ 290		$ 251
Derivative liabilities, fair value	$ 109		$ 109		$ 112
Derivatives not designated as hedges | Interest rate swaps
Derivative [Line Items]
Notional Amount	1,013		1,013		488
Derivative assets, fair value	$ 90		$ 90		$ 74
Derivative liabilities, fair value	$ 0		$ 0		$ 0
Derivatives not designated as hedges | Equity options
Derivative [Line Items]
Notional Amount	69,779		69,779		65,089
Derivative assets, fair value	$ 3,326		$ 3,326		$ 1,374
Derivative liabilities, fair value	$ 97		$ 97		$ 114
Derivatives not designated as hedges | Futures
Derivative [Line Items]
Notional Amount	35		35		18
Derivative assets, fair value	$ 87		$ 87		$ 33
Derivative liabilities, fair value	$ 0		$ 0		$ 0
Derivatives not designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	19,833		19,833		16,376
Derivative assets, fair value	$ 299		$ 299		$ 413
Derivative liabilities, fair value	390		390		257
Derivatives not designated as hedges | Embedded derivatives | Funds withheld
Derivative [Line Items]
Embedded derivative assets, fair value	5,653		5,653		(6,272)
Embedded derivative liabilities, fair value	(28)		(28)		(77)
Derivatives not designated as hedges | Embedded derivatives | Interest sensitive contract liabilities
Derivative [Line Items]
Embedded derivative assets, fair value	0		0		0
Embedded derivative liabilities, fair value	$ 8,198		$ 8,198		$ 5,841
Derivatives not designated as hedges | Other swaps
Derivative [Line Items]
Notional Amount	231		231		89
Derivative assets, fair value	$ 5		$ 5		$ 0
Derivative liabilities, fair value	$ 1		$ 1		$ 4
Net Investment Hedging [Member] | Derivatives designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	227		227		216
Derivative assets, fair value	$ 2		$ 2		$ 2
Derivative liabilities, fair value	0		0		$ 0
Fair Value Hedging [Member] | Derivatives designated as hedges | Foreign currency swaps
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net, Recorded in Other Comprehensive Income	(57)	$ 65	57	$ 9
Fair Value Hedging [Member] | Derivatives designated as hedges | Foreign currency swaps | Investment related gains (losses)
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net	0	0	0	0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(43)	242	(102)	333
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	45	(252)	109	(347)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	2	(10)	7	(14)
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	0	0	0	0
Fair Value Hedging [Member] | Derivatives designated as hedges | Interest rate swaps | Investment related gains (losses)
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net	0	0	0	0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(120)	(5)	(18)	(77)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	120	18	16	93
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	0	13	(2)	16
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	0	0	0	0
Fair Value Hedging [Member] | Derivatives designated as hedges | Foreign currency forwards
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net, Recorded in Other Comprehensive Income	(61)	16	2	(57)
Fair Value Hedging [Member] | Derivatives designated as hedges | Foreign currency forwards | Investment related gains (losses)
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net	3	0	7	1
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(35)	201	(105)	328
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	37	(232)	110	(358)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	2	(31)	5	(30)
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	(42)	16	45	30
Fair Value Hedging [Member] | Derivatives designated as hedges | Cross Currency Interest Rate Contract | Investment related gains (losses)
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net	0	0	0	0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	7	(335)	85	(494)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(10)	298	(80)	495
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	(3)	(37)	5	1
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	0	0	0	0
Fair Value Hedging [Member] | Derivatives designated as hedges | Cross Currency Interest Rate Contract | Interest sensitive contract benefits
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net	0	0	0	0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	13	15	28	25
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(15)	(14)	(30)	(23)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	(2)	1	(2)	2
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	$ 0	$ 0	$ 0	$ 0