Derivative Instruments - Credit Derivatives, Protection Sold, Notional and Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	$ (150,008)	$ (121,400)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(336,761)	(333,349)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(86,954)	(34,269)
Total notional amount	(573,723)	(489,018)
Fair value of receivables	6,855	6,125
Fair value of payables	(2,840)	(2,727)
Net fair value	4,015	3,398
Investment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(116,655)	(89,981)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(261,889)	(263,834)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(69,109)	(29,470)
Total notional amount	(447,653)	(383,285)
Fair value of receivables	4,436	3,659
Fair value of payables	(1,140)	(1,144)
Net fair value	3,296	2,515
Noninvestment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(33,353)	(31,419)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(74,872)	(69,515)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(17,845)	(4,799)
Total notional amount	(126,070)	(105,733)
Fair value of receivables	2,419	2,466
Fair value of payables	(1,700)	(1,583)
Net fair value	$ 719	$ 883