Condensed Consolidated Statements of Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interest [Member]
Beginning Balance at Dec. 31, 2017	$ 794.3	$ 0.3	$ 320.4	$ (93.3)	$ 605.0	$ (38.5)	$ 0.4
Net income	22.2				22.2
Changes in cumulative translation adjustment, net of tax	6.4					6.4
Changes in unrealized gains on derivative instruments, net of tax	0.9					0.9
Treasury stock reissued	1.1		(0.1)	1.2
Treasury stock repurchased	(1.1)			(1.1)
Stock option compensation	0.8		0.8
Amortization of prior service credit, net of tax	(0.2)					(0.2)
Amortization of actuarial net losses, net of tax	0.4					0.4
Ending Balance at Mar. 31, 2018	$ 824.8	$ 0.3	$ 321.1	$ (93.2)	$ 627.2	$ (31.0)	$ 0.4