Derivative Instruments - Credit Derivatives (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Maximum payout/Notional amount
Protection sold	$ (539,647)	$ (573,984)
Protection purchased with identical underlyings	589,158	609,365
Net protection (sold)/purchased	49,511	35,381
Other protection purchased	26,264	23,664
Total credit derivatives
Maximum payout/Notional amount
Protection sold	(539,647)	(573,984)
Protection purchased with identical underlyings	589,158	609,365
Net protection (sold)/purchased	49,511	35,381
Other protection purchased	14,561	13,416
Credit default swaps
Maximum payout/Notional amount
Protection sold	(495,229)	(533,900)
Protection purchased with identical underlyings	512,123	552,021
Net protection (sold)/purchased	16,894	18,121
Other protection purchased	3,151	2,786
Other credit derivatives
Maximum payout/Notional amount
Protection sold	(44,418)	(40,084)
Protection purchased with identical underlyings	77,035	57,344
Net protection (sold)/purchased	32,617	17,260
Other protection purchased	11,410	10,630
Credit-related notes
Maximum payout/Notional amount
Protection sold	0	0
Protection purchased with identical underlyings	0	0
Net protection (sold)/purchased	0	0
Other protection purchased	$ 11,703	$ 10,248