Fair Value Measurements (excluding Consolidated Investment Entities) - Level 3 Financial Instruments (Details) - Measured at fair value on a recurring basis - Level 3 - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Assets held in separate accounts
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	$ 349	$ 293	$ 316	$ 222
Total Realized/Unrealized Gains (Losses) Included in Net income	(9)	1	(35)	4
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	32	53	164	157
Issuances	0	0	0	0
Sales	(16)	(6)	(20)	(7)
Settlements	0	0	0	0
Transfers in to Level 3	0	0	6	0
Transfers out of Level 3	(17)	(30)	(92)	(65)
Fair Value, Assets, ending balance	339	311	339	311
Change In Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI			0
Change In Unrealized Gains (Losses) Included in OCI	0	0		0
Other derivatives
Derivatives Rollforward:
Fair Value, Derivatives, beginning balance				1
Total Realized/Unrealized Gains (Losses) Included in Net income				0
Total Realized/Unrealized Gains (Losses) Included in OCI				0
Purchases				0
Issuances				0
Sales				0
Settlements				(1)
Transfers in to Level 3				0
Transfers out of Level 3				0
Fair Value, Derivatives, ending balance		0		0
Change In Unrealized Gains (Losses) Included in Earnings				(1)
Change In Unrealized Gains (Losses) Included in OCI				0
Embedded derivative on reinsurance
Derivatives Rollforward:
Fair Value, Derivatives, beginning balance	(86)	(85)	(87)	0
Total Realized/Unrealized Gains (Losses) Included in Net income	(3)	(1)	(2)	3
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	0	0	0
Issuances	0	0	0	(89)
Sales	0	0	0	0
Settlements	0	0	0	0
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, Derivatives, ending balance	(89)	(86)	(89)	(86)
Change In Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Change In Unrealized Gains (Losses) Included in OCI	0	0	0	0
Cash and cash equivalents
Derivatives Rollforward:
Fair Value, Derivatives, beginning balance			0
Total Realized/Unrealized Gains (Losses) Included in Net income			0
Total Realized/Unrealized Gains (Losses) Included in OCI			0
Purchases			8
Issuances			0
Sales			0
Settlements			8
Transfers in to Level 3			0
Transfers out of Level 3			0
Fair Value, Derivatives, ending balance	0		0
Change In Unrealized Gains (Losses) Included in Earnings			0
Change In Unrealized Gains (Losses) Included in OCI			0
Guaranteed benefit derivatives
Derivatives Rollforward:
Fair Value, Derivatives, beginning balance	(29)	(44)	(48)	(84)
Total Realized/Unrealized Gains (Losses) Included in Net income	(5)	3	15	41
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	0	0	0
Issuances	0	(4)	(1)	(4)
Sales	0	0	0	0
Settlements	1	1	1	3
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, Derivatives, ending balance	(33)	(44)	(33)	(44)
Change In Unrealized Gains (Losses) Included in Earnings	0	0	0	0
Change In Unrealized Gains (Losses) Included in OCI		0	0	0
U.S. corporate public securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		23		93
Total Realized/Unrealized Gains (Losses) Included in Net income		0		1
Total Realized/Unrealized Gains (Losses) Included in OCI		1		1
Purchases		12		12
Issuances		0		0
Sales		0		(25)
Settlements		(1)		(1)
Transfers in to Level 3		0		0
Transfers out of Level 3		0		(46)
Fair Value, Assets, ending balance		35		35
Change In Unrealized Gains (Losses) Included in Earnings		0		0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		1		1
U.S. corporate public securities | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	19		16
Total Realized/Unrealized Gains (Losses) Included in Net income	0		0
Total Realized/Unrealized Gains (Losses) Included in OCI	(1)		(1)
Purchases	3		7
Issuances	0		0
Sales	0		0
Settlements	(1)		(1)
Transfers in to Level 3	0		0
Transfers out of Level 3	(5)		(6)
Fair Value, Assets, ending balance	15		15
Change In Unrealized Gains (Losses) Included in Earnings	0		0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	0		(1)
U.S. corporate private securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		2,011		1,900
Total Realized/Unrealized Gains (Losses) Included in Net income		10		50
Total Realized/Unrealized Gains (Losses) Included in OCI		(13)		(108)
Purchases		127		210
Issuances		0		0
Sales		(22)		(340)
Settlements		(142)		(198)
Transfers in to Level 3		0		545
Transfers out of Level 3		(37)		(125)
Fair Value, Assets, ending balance		1,934		1,934
Change In Unrealized Gains (Losses) Included in Earnings		0		(1)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		(11)		(107)
U.S. corporate private securities | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	1,780		1,910
Total Realized/Unrealized Gains (Losses) Included in Net income	(2)		(4)
Total Realized/Unrealized Gains (Losses) Included in OCI	(94)		(374)
Purchases	77		235
Issuances	0		0
Sales	0		0
Settlements	(40)		(159)
Transfers in to Level 3	22		145
Transfers out of Level 3	0		(10)
Fair Value, Assets, ending balance	1,743		1,743
Change In Unrealized Gains (Losses) Included in Earnings	(2)		(4)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	(95)		(373)
Foreign corporate public securities and foreign governments
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		10		0
Total Realized/Unrealized Gains (Losses) Included in Net income		0		0
Total Realized/Unrealized Gains (Losses) Included in OCI		0		0
Purchases		17		17
Issuances		0		0
Sales		0		0
Settlements		0		0
Transfers in to Level 3		0		0
Transfers out of Level 3		(10)		0
Fair Value, Assets, ending balance		17		17
Change In Unrealized Gains (Losses) Included in Earnings		0		0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		0		0
Foreign corporate public securities and foreign governments | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	4
Total Realized/Unrealized Gains (Losses) Included in Net income	0
Total Realized/Unrealized Gains (Losses) Included in OCI	0
Purchases	0
Issuances	0
Sales	0
Settlements	0
Transfers in to Level 3	0
Transfers out of Level 3	(4)
Fair Value, Assets, ending balance	0		0
Change In Unrealized Gains (Losses) Included in Earnings	0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	0
Foreign corporate private securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		352		457
Total Realized/Unrealized Gains (Losses) Included in Net income		(15)		(6)
Total Realized/Unrealized Gains (Losses) Included in OCI		21		19
Purchases		29		30
Issuances		0		0
Sales		0		(81)
Settlements		(6)		(38)
Transfers in to Level 3		0		0
Transfers out of Level 3		0		0
Fair Value, Assets, ending balance		381		381
Change In Unrealized Gains (Losses) Included in Earnings		1		3
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		21		16
Foreign corporate private securities | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	403		353
Total Realized/Unrealized Gains (Losses) Included in Net income	(2)		(23)
Total Realized/Unrealized Gains (Losses) Included in OCI	(11)		(42)
Purchases	22		115
Issuances	0		0
Sales	0		0
Settlements	(4)		(33)
Transfers in to Level 3	0		148
Transfers out of Level 3	(4)		(114)
Fair Value, Assets, ending balance	404		404
Change In Unrealized Gains (Losses) Included in Earnings	(2)		(6)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	(11)		(42)
Residential mortgage-backed securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		46		43
Total Realized/Unrealized Gains (Losses) Included in Net income		(4)		(11)
Total Realized/Unrealized Gains (Losses) Included in OCI		0		(1)
Purchases		16		30
Issuances		0		0
Sales		0		(7)
Settlements		0		0
Transfers in to Level 3		0		2
Transfers out of Level 3		(2)		0
Fair Value, Assets, ending balance		56		56
Change In Unrealized Gains (Losses) Included in Earnings		(4)		(11)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		(1)		(1)
Residential mortgage-backed securities | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	31		43
Total Realized/Unrealized Gains (Losses) Included in Net income	(4)		(19)
Total Realized/Unrealized Gains (Losses) Included in OCI	0		0
Purchases	2		4
Issuances	0		0
Sales	0		0
Settlements	0		0
Transfers in to Level 3	0		0
Transfers out of Level 3	(3)		(2)
Fair Value, Assets, ending balance	26		26
Change In Unrealized Gains (Losses) Included in Earnings	(4)		(19)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	0		0
Commercial mortgage-backed securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		2		0
Total Realized/Unrealized Gains (Losses) Included in Net income		0		0
Total Realized/Unrealized Gains (Losses) Included in OCI		0		0
Purchases		10		12
Issuances		0		0
Sales		0		0
Settlements		0		0
Transfers in to Level 3		0		0
Transfers out of Level 3		0		0
Fair Value, Assets, ending balance		12		12
Change In Unrealized Gains (Losses) Included in Earnings		0		0
Commercial mortgage-backed securities | Available-for-sale Securities
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI				0
Asset-backed Securities [Member]
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		78		61
Total Realized/Unrealized Gains (Losses) Included in Net income		0		1
Total Realized/Unrealized Gains (Losses) Included in OCI		(1)		(3)
Purchases		9		19
Issuances		0		0
Sales		0		(5)
Settlements		(22)		(45)
Transfers in to Level 3		0		22
Transfers out of Level 3		(14)		0
Fair Value, Assets, ending balance		50		50
Change In Unrealized Gains (Losses) Included in Earnings		0		0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		1		(1)
Asset-backed Securities [Member] | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	63		44
Total Realized/Unrealized Gains (Losses) Included in Net income	0		(1)
Total Realized/Unrealized Gains (Losses) Included in OCI	(2)		(6)
Purchases	21		52
Issuances	0		0
Sales	0		(10)
Settlements	(1)		(7)
Transfers in to Level 3	0		0
Transfers out of Level 3	(9)		0
Fair Value, Assets, ending balance	72		72
Change In Unrealized Gains (Losses) Included in Earnings	(1)		(1)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	(2)		(6)
Fixed maturities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		2,522		2,554
Total Realized/Unrealized Gains (Losses) Included in Net income		(9)		35
Total Realized/Unrealized Gains (Losses) Included in OCI		8		(92)
Purchases		220		330
Issuances		0		0
Sales		(22)		(458)
Settlements		(171)		(282)
Transfers in to Level 3		0		569
Transfers out of Level 3		(63)		(171)
Fair Value, Assets, ending balance		2,485		2,485
Change In Unrealized Gains (Losses) Included in Earnings		(3)		(9)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		11		(92)
Fixed maturities | Available-for-sale Securities
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	2,300		2,366
Total Realized/Unrealized Gains (Losses) Included in Net income	(8)		(47)
Total Realized/Unrealized Gains (Losses) Included in OCI	(108)		(423)
Purchases	125		413
Issuances	0		0
Sales	0		(10)
Settlements	(46)		(200)
Transfers in to Level 3	22		293
Transfers out of Level 3	(25)		(132)
Fair Value, Assets, ending balance	2,260		2,260
Change In Unrealized Gains (Losses) Included in Earnings	(9)		(30)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	(108)		(422)
Equity securities, at fair value
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance	203	249	203	172
Total Realized/Unrealized Gains (Losses) Included in Net income	(8)	1	(35)	14
Total Realized/Unrealized Gains (Losses) Included in OCI	0	0	0	0
Purchases	0	0	27	225
Issuances	0	0	0	0
Sales	0	0	0	(152)
Settlements	0	0	0	(9)
Transfers in to Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair Value, Assets, ending balance	195	250	195	250
Change In Unrealized Gains (Losses) Included in Earnings	(8)	1	(35)	(1)
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI	$ 0	0	$ 0	0
Fixed Maturities, Trading
Fixed Maturities and Equity Securities Rollforward:
Fair Value, Assets, beginning balance		45		0
Total Realized/Unrealized Gains (Losses) Included in Net income		0		0
Total Realized/Unrealized Gains (Losses) Included in OCI		0		0
Purchases		0		45
Issuances		0		0
Sales		0		0
Settlements		(40)		(40)
Transfers in to Level 3		0		0
Transfers out of Level 3		0		0
Fair Value, Assets, ending balance		5		5
Change In Unrealized Gains (Losses) Included in Earnings		0		0
Derivatives Rollforward:
Change In Unrealized Gains (Losses) Included in OCI		$ 0		$ 0