Derivative Instruments - Credit Derivatives, Protection Sold, Notional and Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	$ (222,797)	$ (121,400)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(385,186)	(333,349)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(125,068)	(34,269)
Total notional amount	(733,051)	(489,018)
Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	7,366	6,125
Fair value of payables	(2,920)	(2,727)
Net fair value	4,446	3,398
Investment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(180,831)	(89,981)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(300,486)	(263,834)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(101,657)	(29,470)
Total notional amount	(582,974)	(383,285)
Investment-grade | Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	4,886	3,659
Fair value of payables	(1,709)	(1,144)
Net fair value	3,177	2,515
Noninvestment-grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(41,966)	(31,419)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(84,700)	(69,515)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(23,411)	(4,799)
Total notional amount	(150,077)	(105,733)
Noninvestment-grade | Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	2,480	2,466
Fair value of payables	(1,211)	(1,583)
Net fair value	$ 1,269	$ 883