Subsequent Events (Details) - USD ($)		12 Months Ended
	Feb. 06, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jan. 07, 2025
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock, net of issuance costs		$ 2,323,000,000	$ 0	$ 0
Fixed-to-floating rate senior notes | Parent Company and Non-banking Subsidiaries | 4.857% Notes due 2034
Subsequent Event [Line Items]
Interest rate on debt		4.857%
Fixed-to-floating rate senior notes | Parent Company and Non-banking Subsidiaries | 1.746% notes due 2026
Subsequent Event [Line Items]
Interest rate on debt		1.746%
Subsequent Event | Series K Preferred Stock
Subsequent Event [Line Items]
Shares issued (in shares)	750,000
Ownership Interest Per Depositary Share	1.00%
Liquidation preference per share (USD per share)	$ 100,000
Proceeds from issuance of preferred stock, net of issuance costs	$ 743,000,000
Subsequent Event | Series K Preferred Stock, Depository Share
Subsequent Event [Line Items]
Liquidation preference per share (USD per share)	$ 1,000
Subsequent Event | Fixed-to-floating rate senior notes | Parent Company and Non-banking Subsidiaries | 4.857% Notes due 2034
Subsequent Event [Line Items]
Debt redeemed					$ 500,000,000
Interest rate on debt					4.857%
Subsequent Event | Fixed-to-floating rate senior notes | Parent Company and Non-banking Subsidiaries | 1.746% notes due 2026
Subsequent Event [Line Items]
Debt redeemed	$ 300,000,000
Interest rate on debt	1.746%