Equity - Schedule of Stock by Class (Details) - $ / shares	May 13, 2019	Jun. 20, 2014	Mar. 25, 2014	Jan. 17, 2013	Dec. 31, 2019	Dec. 31, 2018
5.875% Non-Cumulative Preferred Stock, Series A
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				2,400,000	2,400,000	2,400,000
Dividend rate (as a percent)				5.875%
Liquidation preference (in dollars per share)				$ 25.00
6.000% Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series C
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)		3,000,000			3,000,000	3,000,000
Dividend rate (as a percent)		6.00%
Liquidation preference (in dollars per share)		$ 25.00
5.700% Non-Cumulative Preferred Stock, Series D
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	4,000,000				4,000,000	4,000,000
Dividend rate (as a percent)	5.70%		6.875%
Liquidation preference (in dollars per share)	$ 25.00			$ 25.00