Securities Financing Activities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Offsetting Liabilities [Line Items]
Short-term Debt	$ 23,678	$ 23,422
Securities Sold under Agreements to Repurchase
Offsetting Liabilities [Line Items]
Short-term Debt	2,122	2,128
Securities Sold under Agreements to Repurchase | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	641	318
Securities Sold under Agreements to Repurchase | State and Municipal
Offsetting Liabilities [Line Items]
Short-term Debt	297	272
Securities Sold under Agreements to Repurchase | GSE
Offsetting Liabilities [Line Items]
Short-term Debt	23	74
Securities Sold under Agreements to Repurchase | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	672	1,045
Securities Sold under Agreements to Repurchase | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	489	419
Securities Sold under Agreements to Repurchase | Overnight and Continuous
Offsetting Liabilities [Line Items]
Short-term Debt	1,802	2,052
Securities Sold under Agreements to Repurchase | Overnight and Continuous | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	631	318
Securities Sold under Agreements to Repurchase | Overnight and Continuous | State and Municipal
Offsetting Liabilities [Line Items]
Short-term Debt	297	272
Securities Sold under Agreements to Repurchase | Overnight and Continuous | GSE
Offsetting Liabilities [Line Items]
Short-term Debt	23	74
Securities Sold under Agreements to Repurchase | Overnight and Continuous | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	666	1,019
Securities Sold under Agreements to Repurchase | Overnight and Continuous | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	185	369
Securities Sold under Agreements to Repurchase | Up to 30 days
Offsetting Liabilities [Line Items]
Short-term Debt	320	76
Securities Sold under Agreements to Repurchase | Up to 30 days | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	10	0
Securities Sold under Agreements to Repurchase | Up to 30 days | State and Municipal
Offsetting Liabilities [Line Items]
Short-term Debt	0	0
Securities Sold under Agreements to Repurchase | Up to 30 days | GSE
Offsetting Liabilities [Line Items]
Short-term Debt	0	0
Securities Sold under Agreements to Repurchase | Up to 30 days | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	6	26
Securities Sold under Agreements to Repurchase | Up to 30 days | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	$ 304	$ 50