Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Preferred stock outstanding	$ 265	$ 265
Preferred stock, shares outstanding (shares)	265	265
6.0% Non-Cumulative Preferred Stock, Series I
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)	265	265
Dividend rate	6.00%	6.00%
Preferred stock, redemption price per share (usd per share)	$ 1,000,000