Components of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		$ (63.8)	$ (45.9)
Other comprehensive income (loss) before reclassifications		7.0	1.3
Amounts reclassified to consolidated statement of income	[1]	0.1	(0.5)
Tax benefit (expense)		0.2	2.4
Other comprehensive income (loss)		7.3	3.2
Ending balance		(56.5)	(42.7)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(50.0)	(38.5)
Other comprehensive income (loss) before reclassifications		7.9	9.9
Amounts reclassified to consolidated statement of income	[1]	0.0	0.0
Tax benefit (expense)		0.0	0.0
Other comprehensive income (loss)		7.9	9.9
Ending balance		(42.1)	(28.6)
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(13.2)	(11.5)
Other comprehensive income (loss) before reclassifications		0.0	0.0
Amounts reclassified to consolidated statement of income	[1]	0.0	0.0
Tax benefit (expense)		0.0	0.0
Other comprehensive income (loss)		0.0	0.0
Ending balance		(13.2)	(11.5)
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(0.6)	4.1
Other comprehensive income (loss) before reclassifications		(0.9)	(8.6)
Amounts reclassified to consolidated statement of income	[1]	0.1	(0.5)
Tax benefit (expense)		0.2	2.4
Other comprehensive income (loss)		(0.6)	(6.7)
Ending balance		$ (1.2)	$ (2.6)

[1] Amounts classified to cost of sales and selling, general and administrative expenses.