Components of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		$ (45.9)	$ (34.7)	$ 0.2
Other comprehensive income before reclassifications		(20.2)	(23.2)	(37.6)
Amounts reclassified to consolidated statement of income	[1]	(0.1)	2.2	(0.6)
Tax benefit (expense)		2.4	9.8	3.3
Other comprehensive (loss) income		(17.9)	(11.2)	(34.9)
Ending balance		(63.8)	(45.9)	(34.7)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(38.5)	(16.4)	12.7
Other comprehensive income before reclassifications		(12.1)	(35.8)	(29.1)
Amounts reclassified to consolidated statement of income	[1]	0.0	0.0	0.0
Tax benefit (expense)		0.6	13.7	0.0
Other comprehensive (loss) income		(11.5)	(22.1)	(29.1)
Ending balance		(50.0)	(38.5)	(16.4)
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(11.5)	(17.7)	(13.0)
Other comprehensive income before reclassifications		(2.2)	3.0	(7.7)
Amounts reclassified to consolidated statement of income	[1]	0.0	5.2	0.8
Tax benefit (expense)		0.5	(2.0)	2.2
Other comprehensive (loss) income		(1.7)	6.2	(4.7)
Ending balance		(13.2)	(11.5)	(17.7)
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		4.1	(0.6)	0.5
Other comprehensive income before reclassifications		(5.9)	9.6	(0.8)
Amounts reclassified to consolidated statement of income	[1]	(0.1)	(3.0)	(1.4)
Tax benefit (expense)		1.3	(1.9)	1.1
Other comprehensive (loss) income		(4.7)	4.7	(1.1)
Ending balance		$ (0.6)	$ 4.1	$ (0.6)

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