Shares and Stockholders' Equity - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Preferred stock, issued (in shares)		40,000	40,000
Issuance of preferred stock, net of issuance costs		$ 0	$ 986,000,000	$ 0
Deferred compensation plan mark to market adjustment		$ 1,000,000	$ 13,000,000	$ (8,000,000)
9.250% Fixed Rate Reset Non-Cumulative Preferred Stock, Series C
Class of Stock [Line Items]
Preferred stock, issued (in shares)		20,000	20,000
Percent of non cumulative preferred stock	9.25%
Liquidation preference, value	$ 25,000
Preferred stock, liquidation preference (in shares)	20,000
Issuance of preferred stock, net of issuance costs	$ 493,000,000
Preferred stock, dividend rate	5.318%
9.000% Non-Cumulative Preferred Stock Series D
Class of Stock [Line Items]
Preferred stock, issued (in shares)		20,000	20,000
Issuance of preferred stock, net of issuance costs	$ 493,000,000
Series C Preferred Stock Depositary Shares
Class of Stock [Line Items]
Liquidation preference, value	25,500
Depositary shares, value	$ 1,020
Series C Preferred Stock Depositary Shares | 9.250% Fixed Rate Reset Non-Cumulative Preferred Stock, Series C
Class of Stock [Line Items]
Preferred stock, issued (in shares)	500,000
Liquidation preference, value	$ 25,000
Preferred stock, redemption percentage	102.00%
Depositary shares, value	$ 1,000
Series D Depositary Shares | 9.000% Non-Cumulative Preferred Stock Series D
Class of Stock [Line Items]
Preferred stock, issued (in shares)	20,000,000
Percent of non cumulative preferred stock	9.00%
Liquidation preference, value	$ 25,000
Preferred stock, liquidation preference (in shares)	20,000
Preferred stock, redemption percentage	102.00%
Depositary shares, value	$ 25,500	$ 25,000
Preferred stock, redemption price (in dollars per share)	$ 25.50	$ 25.00