Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid- In Capital	Retained Earnings	Accumulated Other Comprehensive Income (loss)	Non Controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock	$ 0.6
Additional paid-in capital	983.9
Retained earnings	218.4
Accumulated other comprehensive loss, net	(58.4)
Noncontrolling interest	0.3
Beginning balance (in shares) at Dec. 31, 2020		61.9
Beginning balance at Dec. 31, 2020	1,144.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee stock compensation (in shares)		0.3
Employee stock compensation	8.9		$ 8.9
Deferred compensation	(5.6)		(0.5)	$ (5.1)
Proceeds from stock issuances under employee plans (in shares)		1.5
Proceeds from stock issuances under employee plans	129.3		129.3
Cash dividends declared	(38.6)			(38.6)
Repurchase and retirement of common shares (in shares)		(2.5)
Repurchase and retirement of common shares	(299.1)		(39.1)	(260.0)
Net income	134.2			134.1		$ 0.1
Contributions	1.2					1.2
Other comprehensive income (loss)	(14.1)				$ (14.1)
Ending balance (in shares) at Mar. 31, 2021		61.2
Ending balance at Mar. 31, 2021	1,061.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock	0.6
Additional paid-in capital	1,082.5
Retained earnings	48.8
Accumulated other comprehensive loss, net	(72.5)
Noncontrolling interest	1.6
Common stock	0.6
Additional paid-in capital	1,143.8
Retained earnings	157.3
Accumulated other comprehensive loss, net	(77.4)
Noncontrolling interest	2.0
Beginning balance (in shares) at Dec. 31, 2021		60.4
Beginning balance at Dec. 31, 2021	1,226.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Employee stock compensation (in shares)		0.4
Employee stock compensation	13.3		13.3
Deferred compensation	(0.2)		(0.7)	0.5
Proceeds from stock issuances under employee plans (in shares)		0.2
Proceeds from stock issuances under employee plans	13.9		13.9
Cash dividends declared	(37.9)			(37.9)
Repurchase and retirement of common shares (in shares)		(1.5)
Repurchase and retirement of common shares	(172.3)		$ (27.5)	(144.8)
Net income	69.9			$ 69.9		$ 0.0
Other comprehensive income (loss)	7.6				$ 7.6
Ending balance (in shares) at Mar. 31, 2022		59.5
Ending balance at Mar. 31, 2022	1,120.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock	0.6
Additional paid-in capital	1,142.8
Retained earnings	45.0
Accumulated other comprehensive loss, net	(69.8)
Noncontrolling interest	$ 2.0