Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Gross amounts recognized
Federal funds sold and securities purchased under agreements to resell	$ 688	$ 2,451
Derivatives (included in other assets)	369	386
Total assets	1,057	2,837
Federal funds and other short-term borrowings	12,124	10,442
Derivatives (included in other liabilities)	353	451
Total liabilities	12,477	10,893
Gross amounts offset in the balance sheet
Federal funds sold and securities purchased under agreements to resell	0	(25)
Derivatives (included in other assets)	0	0
Total assets	0	(25)
Federal funds and other short-term borrowings	0	(25)
Derivatives (included in other liabilities)	0	0
Total liabilities	0	(25)
Net amounts presented in the balance sheet
Federal funds sold and securities purchased under agreements to resell	688	2,426
Derivatives (included in other assets)	369	386
Total assets	1,057	2,812
Federal funds and other short-term borrowings	12,124	10,417
Derivatives (included in other liabilities)	353	451
Total liabilities	12,477	10,868
Gross amounts not offset in the balance sheet, Financial Instruments
Federal funds sold and securities purchased under agreements to resell	0	0
Derivatives (included in other assets)	(23)	(10)
Total assets	(23)	(10)
Federal funds and other short-term borrowings	0	0
Derivatives (included in other liabilities)	(23)	(10)
Total liabilities	(23)	(10)
Gross amounts not offset in the balance sheet, Cash collateral received/ pledged
Federal funds sold and securities purchased under agreements to resell	0	0
Derivatives (included in other assets)	(326)	(367)
Total assets	(326)	(367)
Federal funds and other short-term borrowings	0	0
Derivatives (included in other liabilities)	0	0
Total liabilities	0	0
Net amount
Federal funds sold and securities purchased under agreements to resell	688	2,426
Derivatives (included in other assets)	20	9
Total assets	708	2,435
Federal funds and other short-term borrowings	12,124	10,417
Derivatives (included in other liabilities)	330	441
Total liabilities	$ 12,454	$ 10,858