Pledged Assets and Collateral, Offsetting - Securities Financing Activities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	$ 78,912	$ 89,066
Collateral received with the right to sell or repledge	128,000	124,400
Resale, securities borrowing and similar arrangements
Gross amounts recognized	107,586	103,140
Gross amounts offset in consolidated balance sheet	(28,674)	(14,074)
Net amounts in consolidated balance sheet	78,912	89,066
Collateral not recognized in consolidated balance sheet	(78,303)	(88,330)
Net amount	609	736
Repurchase and securities lending agreements
Gross amounts recognized	53,805	35,043
Gross amounts offset in consolidated balance sheet	(28,674)	(14,074)
Net amounts in consolidated balance sheet	25,131	20,969
Collateral pledged but not netted in consolidated balance sheet	(24,837)	(20,820)
Net amount	294	149
Collateral sold or repledged	35,300	28,800
Collateral pledged, fair value	54,900	35,900
Fed funds sold and securities purchased under resale agreements [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	55,800	66,200
Resale, securities borrowing and similar arrangements
Net amounts in consolidated balance sheet	55,800	66,200
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	23,100	22,900
Resale, securities borrowing and similar arrangements
Net amounts in consolidated balance sheet	$ 23,100	$ 22,900