Accumulated Other Comprehensive Loss, net of tax Reclassifications from AOCI, net of tax (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income tax effect		$ (7.1)	$ 9.6	$ (2.4)
Total Reclassification from AOCI		28.6	21.1	8.7
Foreign Currency Translation Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		23.3	(0.9)	0.0
Available-for-sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		0.0	0.0	1.4
Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		2.0	1.9	1.7
Defined Benefit and Postretirement Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	$ 10.4	$ 10.5	$ 10.8

[1] These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 12 for further information