Securities Financing Activities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Offsetting Liabilities [Line Items]
Short-term Debt	$ 25,687	$ 5,292
Securities Sold under Agreements to Repurchase
Offsetting Liabilities [Line Items]
Short-term Debt	2,193	2,435
Securities Sold under Agreements to Repurchase | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	883	1,158
Securities Sold under Agreements to Repurchase | State and Municipal
Offsetting Liabilities [Line Items]
Short-term Debt	244	0
Securities Sold under Agreements to Repurchase | GSE
Offsetting Liabilities [Line Items]
Short-term Debt	52	78
Securities Sold under Agreements to Repurchase | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	663	861
Securities Sold under Agreements to Repurchase | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	351	338
Securities Sold under Agreements to Repurchase | Overnight and Continuous
Offsetting Liabilities [Line Items]
Short-term Debt	1,898	1,735
Securities Sold under Agreements to Repurchase | Overnight and Continuous | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	873	749
Securities Sold under Agreements to Repurchase | Overnight and Continuous | State and Municipal
Offsetting Liabilities [Line Items]
Short-term Debt	244	0
Securities Sold under Agreements to Repurchase | Overnight and Continuous | GSE
Offsetting Liabilities [Line Items]
Short-term Debt	46	53
Securities Sold under Agreements to Repurchase | Overnight and Continuous | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	593	720
Securities Sold under Agreements to Repurchase | Overnight and Continuous | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	142	213
Securities Sold under Agreements to Repurchase | Up to 30 days
Offsetting Liabilities [Line Items]
Short-term Debt	295	700
Securities Sold under Agreements to Repurchase | Up to 30 days | U.S. Treasury
Offsetting Liabilities [Line Items]
Short-term Debt	10	409
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	6	25
Securities Sold under Agreements to Repurchase | Up to 30 days | Agency MBS - residential
Offsetting Liabilities [Line Items]
Short-term Debt	70	141
Securities Sold under Agreements to Repurchase | Up to 30 days | Corporate and other debt securities
Offsetting Liabilities [Line Items]
Short-term Debt	$ 209	$ 125