CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared (per share)	$ 0.08	$ 0.08
Net income	$ 43.0	$ 56.4
Other Comprehensive Income (Loss), Excluding Acquisition and Conversion Activity Net of Tax,	1.3	13.4
Stock Issued During Period, Value, Share-based Compensation, Gross and Treasury Stock, Acquired	(7.3)	(23.8)
Issuance of common stock under Employee Stock Purchase Plan	0.4	0.4
Stock Repurchased During Period, Value		(18.8)
Dividends	(19.5)	(20.1)
Equity compensation expense	4.4	5.3
Changes in non-controlling interests	$ (0.1)	$ (0.1)