Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions				12 Months Ended
	Nov. 01, 2021	Aug. 20, 2021	Jul. 22, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased				9.0
Purchase of treasury stock				$ 105.8	$ 172.7
Treasury stock acquired, Shares,				1.8	2.5
Treasury Stock Acquired, Average Cost Per Share				$ 60.24	$ 69.53
Common stock reissued				2.6	2.6
Preferred stock, par value				$ 1.00	$ 1.00	$ 1.00
Non-cumulative Perpetual Series D Preferred Stock [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock dividend			4.50%
Preferred stock, par value			$ 1.00
Preferred stock liquidation preference per depositary share			25
Preferred stock, liquidation preference per share			$ 25,000
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.
Underwritten registered public offering			$ 300.0
Non Cumulative Perpetual Series A Preferred Stock [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock dividend		6.25%
Preferred stock redemption price per depositary share		$ 25.00
Vining Sparks [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Common stock reissued	1.2