Investments - Net Realized Capital Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	$ (25)	$ (182)
Available for Sale Securities, Gross Realized Gains (Losses), Proceeds on Sales	880	870
Debt Securities, Available-for-Sale, Realized Gain	12	10
Debt Securities, Available-for-Sale, Realized Loss	21	25
Embedded derivatives - fixed maturities
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	1	(2)
Stabilizer and Managed Custody Guarantees
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	0	3
Other derivatives, net
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	0	7
Standalone derivatives
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	3	(3)
Derivatives
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	(28)	52
Other investments
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	(25)	(182)
Mortgages [Member]
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	1	(1)
Fixed Maturities, Available-for-sale, Including Securities Pledged
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	(9)	(59)
Fixed Maturities, at Fair Value Using the Fair Value Option
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	11	(175)
Equity securities
Available-for-sale Securities Including Securities Pledged [Line Items]
Realized capital gains (losses)	$ (4)	$ (4)

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.3(a))
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

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