Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	$0.001 Par Value Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2019		53,000,000.0		1,200,000
Beginning balance at Dec. 31, 2019	$ 1,088.5	$ 0.1	$ 716.1	$ (39.6)	$ (9.9)	$ 421.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	305.1					305.1
Other comprehensive loss, net of tax	(15.4)				(15.4)
Share-based compensation activity (in shares)		1,300,000
Share-based compensation activity	68.8		68.8
Ending balance (in shares) at Dec. 31, 2020		54,300,000		1,200,000
Ending balance at Dec. 31, 2020	1,447.0	$ 0.1	784.9	$ (39.6)	(25.3)	726.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	230.9					230.9
Other comprehensive loss, net of tax	9.2				9.2
Share-based compensation activity (in shares)		800,000
Share-based compensation activity	$ 44.5		44.5
Repurchases of stock (in shares)	(2,600,000)			(2,600,000)
Repurchases of common stock	$ (112.6)			$ (112.6)
Ending balance (in shares) at Dec. 31, 2021	55,100,000	55,100,000		3,800,000
Ending balance at Dec. 31, 2021	$ 1,619.0	$ 0.1	829.4	$ (152.2)	(16.1)	957.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(223.8)					(223.8)
Other comprehensive loss, net of tax	19.2				19.2
Share-based compensation activity (in shares)		600,000
Share-based compensation activity	$ 44.1		44.1
Repurchases of stock (in shares)	(1,800,000)			(1,800,000)
Repurchases of common stock	$ (75.5)			$ (75.5)
Ending balance (in shares) at Dec. 31, 2022	55,700,000	55,700,000		5,600,000
Ending balance at Dec. 31, 2022	$ 1,383.0	$ 0.1	$ 873.5	$ (227.7)	$ 3.1	$ 734.0