Stock Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock Repurchase
Common stock authorized for repurchase, maximum (in shares)	250.0
Common stock remaining number of shares authorized to repurchase	139.6
Stock repurchased (shares)			0.4
Stock repurchased during period (value)			$ 20.0
Weighted average price per share of common stock (in dollars per share)			$ 51.87
Payment of income tax obligation on employee equity awards	$ 1.2	$ 1.6	$ 6.2