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Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended			12 Months Ended			24 Months Ended
	Feb. 28, 2022	Oct. 31, 2020	Oct. 31, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020
Class of Stock [Line Items]
Dividends paid				$ 22.4	$ 21.7	$ 20.9
Cash dividends per share (in dollars per share)				$ 1.08	$ 1.04	$ 1.00
Stock repurchase program, period in force		2 years	2 years
Authorized amount (up to)			$ 50.0
Shares repurchases (in shares)					0.1	0.2	0.3
Repurchase of common stock				$ 0.0	$ 5.3	$ 15.0	$ 20.3
Stock repurchase program, remaining authorized repurchase amount		$ 50.0
Subsequent Event
Class of Stock [Line Items]
Cash dividend declared (in dollars per share)	$ 0.28

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