Components of Changes in Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (34.7)		$ 0.2
Other comprehensive income (loss) before reclassifications	(18.5)		(1.9)
Amounts reclassified to consolidated statement of income	(1.7)	[1]	0.3	[1]
Tax benefit (expense)	(1.2)
Other comprehensive loss	(21.4)		(1.6)
Ending balance	(56.1)		(1.4)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(16.4)		12.7
Other comprehensive income (loss) before reclassifications	(24.3)		(1.6)
Amounts reclassified to consolidated statement of income	0	[1]	0	[1]
Tax benefit (expense)	0
Other comprehensive loss	(24.3)		(1.6)
Ending balance	(40.7)		11.1
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(17.7)		(13.0)
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified to consolidated statement of income	0	[1]	0	[1]
Tax benefit (expense)	0
Other comprehensive loss	0		0
Ending balance	(17.7)		(13.0)
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(0.6)		0.5
Other comprehensive income (loss) before reclassifications	5.8		(0.3)
Amounts reclassified to consolidated statement of income	(1.7)	[1]	0.3	[1]
Tax benefit (expense)	(1.2)
Other comprehensive loss	2.9		0
Ending balance	$ 2.3		$ 0.5

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