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Fair Value - Fair Value Option (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ (215)	$ (1,143)	$ 136	$ (2,104)
Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(221)	(1,149)	75	(2,065)
Unpaid principal balance	41,122		41,122		$ 33,653
Mark to fair value	(3,045)		(3,045)		(2,842)
Fair value	38,077		38,077		30,811
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	(8)	(34)	(11)	(52)
Future policy benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(20)	0	(67)	0
Residential mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	399		399		472
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status	239		239		360
Unpaid principal balance	439		439		522
Fair value	399		399		472
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(40)		(40)		(50)
Residential mortgage loans | Loans Insured or Guaranteed by US Government Authorities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	160		160		221
Mortgage loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option, loans, 90 days or more past due	21		21		2
Fair Value, Option, Loans Held as Assets, Aggregate Amount in Nonaccrual Status	125		125		19
Unpaid principal balance	208		208		74
Fair value	146		146		19
Fair Value, Option, Loans Held as Assets, Aggregate Difference	(62)		(62)		$ (55)
Investment related gains (losses) | Trading securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	(32)	(161)	32	(368)
Net investment income | Investment funds
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	27	36	91	56
Future policy and other policy benefits | Future policy benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Total gains (losses)	$ 31	$ 131	$ 5	$ 273

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This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

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This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

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