Components of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		$ (34.7)	$ 0.2	$ 2.5
Other comprehensive income before reclassifications		(23.2)	(37.6)	0.3
Amounts reclassified to consolidated statement of income	[1]	2.2	(0.6)	1.0
Tax benefit (expense)		9.8	3.3	(3.6)
Other comprehensive income (loss)		(11.2)	(34.9)	(2.3)
Ending balance		(45.9)	(34.7)	0.2
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(16.4)	12.7	22.8
Other comprehensive income before reclassifications		(35.8)	(29.1)	(10.1)
Amounts reclassified to consolidated statement of income	[1]	0.0	0.0	0.0
Tax benefit (expense)		13.7	0.0	0.0
Other comprehensive income (loss)		(22.1)	(29.1)	(10.1)
Ending balance		(38.5)	(16.4)	12.7
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(17.7)	(13.0)	(20.5)
Other comprehensive income before reclassifications		3.0	(7.7)	11.2
Amounts reclassified to consolidated statement of income	[1]	5.2	0.8	0.0
Tax benefit (expense)		(2.0)	2.2	(3.7)
Other comprehensive income (loss)		6.2	(4.7)	7.5
Ending balance		(11.5)	(17.7)	(13.0)
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(0.6)	0.5	0.2
Other comprehensive income before reclassifications		9.6	(0.8)	(0.8)
Amounts reclassified to consolidated statement of income	[1]	(3.0)	(1.4)	1.0
Tax benefit (expense)		(1.9)	1.1	0.1
Other comprehensive income (loss)		4.7	(1.1)	0.3
Ending balance		$ 4.1	$ (0.6)	$ 0.5

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