Derivative Instruments - Summary of Notional and Fair Value of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative [Line Items]
Derivative assets, fair value	$ 2,932		$ 2,932		$ 4,387
Derivative liabilities, fair value	1,223		1,223		472
Total derivative assets	(2,155)		(2,155)		(5,747)
Total derivative liabilities	6,674		6,674		15,424
Derivatives designated as hedges
Derivative [Line Items]
Derivative assets, fair value	1,140		1,140		470
Derivative liabilities, fair value	$ 796		$ 796		$ 236
Derivatives designated as hedges | Foreign currency swaps
Derivative [Line Items]
Notional Amount	6,617		6,617		6,371
Derivative assets, fair value	$ 678		$ 678		$ 281
Derivative liabilities, fair value	$ 109		$ 109		$ 56
Derivatives designated as hedges | Interest rate swaps
Derivative [Line Items]
Notional Amount	6,770		6,770		500
Derivative assets, fair value	$ 28		$ 28		$ 0
Derivative liabilities, fair value	$ 8		$ 8		$ 1
Derivatives designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	5,009		5,009		6,395
Derivative assets, fair value	$ 427		$ 427		$ 189
Derivative liabilities, fair value	$ 3		$ 3		$ 2
Derivatives designated as hedges | Cross Currency Interest Rate Contract
Derivative [Line Items]
Notional Amount	4,468		4,468		2,783
Derivative assets, fair value	$ 0		$ 0		$ 0
Derivative liabilities, fair value	676		676		173
Derivatives not designated as hedges
Derivative [Line Items]
Total derivative assets	3,295		3,295		(5,277)
Total derivative liabilities	$ 5,878		$ 5,878		$ 15,188
Derivatives not designated as hedges | Foreign currency swaps
Derivative [Line Items]
Notional Amount	2,928		2,928		2,592
Derivative assets, fair value	$ 149		$ 149		$ 57
Derivative liabilities, fair value	$ 90		$ 90		$ 19
Derivatives not designated as hedges | Interest rate swaps
Derivative [Line Items]
Notional Amount	461		461		483
Derivative assets, fair value	$ 69		$ 69		$ 78
Derivative liabilities, fair value	$ 1		$ 1		$ 1
Derivatives not designated as hedges | Equity options
Derivative [Line Items]
Notional Amount	60,234		60,234		57,890
Derivative assets, fair value	$ 1,076		$ 1,076		$ 3,629
Derivative liabilities, fair value	$ 105		$ 105		$ 115
Derivatives not designated as hedges | Futures
Derivative [Line Items]
Notional Amount	21		21		33
Derivative assets, fair value	$ 20		$ 20		$ 67
Derivative liabilities, fair value	$ 1		$ 1		$ 0
Derivatives not designated as hedges | Total return swaps
Derivative [Line Items]
Notional Amount	137		137		231
Derivative assets, fair value	$ 0		$ 0		$ 10
Derivative liabilities, fair value	$ 14		$ 14		$ 0
Derivatives not designated as hedges | Credit default swaps
Derivative [Line Items]
Notional Amount	10		10		10
Derivative assets, fair value	$ 0		$ 0		$ 0
Derivative liabilities, fair value	$ 1		$ 1		$ 3
Derivatives not designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	11,623		11,623		7,382
Derivative assets, fair value	$ 478		$ 478		$ 76
Derivative liabilities, fair value	215		215		98
Derivatives not designated as hedges | Embedded derivatives | Funds withheld
Derivative [Line Items]
Funds withheld at interest	(5,087)		(5,087)
Funds withheld liability (portion at fair value: 2022 – $0 and 2021 – $45)	0		0
Embedded derivative assets, fair value					1,360
Embedded derivative liabilities, fair value					45
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	$ 5,451		$ 5,451		$ 14,907
Net Investment Hedging [Member] | Derivatives designated as hedges | Foreign currency forwards
Derivative [Line Items]
Notional Amount	235		235		231
Derivative assets, fair value	$ 7		$ 7		$ 0
Derivative liabilities, fair value	0		0		$ 4
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	65	$ 0	9	$ 0
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
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	242		333
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(252)		(347)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	(10)		(14)
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	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
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(5)		(77)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	18		93
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	13		16
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	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	16	4	(57)	4
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	0	0	1	0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	201	(13)	328	205
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(232)	29	(358)	(188)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	(31)	16	(30)	17
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	16	0	30	0
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	(335)	5	(494)	(31)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	298	(9)	495	32
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	(37)	(4)	1	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	15	5	25	6
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(14)	(4)	(23)	(5)
Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)	1	1	2	1
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Amortization Approach	$ 0	$ 0	$ 0	$ 0