Investments - Investment Related Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
AFS fixed maturity securities
Gross realized gains on investment activity	$ 217	$ 208	$ 320	$ 281
Gross realized losses on investment activity	(832)	(171)	(1,242)	(314)
Net realized investment gains (losses) on AFS securities	(615)	37	(922)	(33)
Debt Securities, Trading, Gain (Loss)	(161)	61	(368)	(8)
Net recognized investment gains (losses) on equity securities	(271)	8	(248)	25
Derivative gains (losses)	(3,932)	2,484	(6,973)	2,046
Provision for Loan, Lease, and Other Losses	(172)	2	(364)	60
Other gains	487	0	807	80
Gain (Loss) on Investments	(5,763)	2,592	(9,963)	2,170
Proceeds from Sale of Debt Securities, Available-for-sale	1,614	2,006	5,785	2,898
Gain (Loss) on Securities [Line Items]
Gain (Loss) on Investments	(5,763)	2,592	(9,963)	2,170
Debt Securities, Available-for-sale, Realized Gain (Loss)	(615)	37	(922)	(33)
Gross realized gains on investment activity	217	208	320	281
Debt Securities, Available-for-sale, Realized Loss	832	171	1,242	314
Debt Securities, Trading, Gain (Loss)	(161)	61	(368)	(8)
Net recognized investment gains (losses) on equity securities	(271)	8	(248)	25
Derivative gains (losses)	(3,932)	2,484	(6,973)	2,046
Provision for Loan, Lease, and Other Losses	172	(2)	364	(60)
Other gains	487	0	807	80
Mortgage loans
AFS fixed maturity securities
Gain (Loss) on Investments	(1,099)	0	(1,895)	0
Gain (Loss) on Securities [Line Items]
Gain (Loss) on Investments	$ (1,099)	$ 0	$ (1,895)	$ 0

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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).

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