Subsequent Events (Details) $ / shares in Units, $ in Millions			6 Months Ended
	Jul. 22, 2021 USD ($) $ / shares	Nov. 11, 2020	Jun. 30, 2021 Event $ / shares	Jul. 21, 2021 $ / shares	Dec. 31, 2020 $ / shares	Jun. 30, 2020 $ / shares
Subsequent Event [Line Items]
Number of types of subsequent events | Event			2
Preferred stock, par value			$ 1		$ 1	$ 1.00
Stock Dividend		50.00%
Non-Cumulative Perpetual Preferred Stock, Series D [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Issuance of preferred stock | $	$ 300.0
Preferred stock, par value	$ 1.00
Preferred stock, liquidation preference per share	25,000
Preferred stock liquidation preference per depositary share	$ 25
Stock Dividend	4.50%
Preferred stock, redemption terms	The Company may redeem the Series D preferred stock at its option, subject to regulatory approval, on or after August 15, 2026.
Non-Cumulative Perpetual Preferred Stock, Series A [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Preferred Stock, Redemption price per depositary share				$ 25.00