Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	$ (162.6)
Other comprehensive income (loss) before reclassifications	14.0
Amounts reclassified out	0.6
Other comprehensive income (loss), net of tax	14.6	$ (51.1)
Balance, ending	(148.0)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(3.1)
Other comprehensive income (loss) before reclassifications	(1.0)
Amounts reclassified out	0.3
Other comprehensive income (loss), net of tax	(0.7)
Balance, ending	(3.8)
Unrealized Gains on Investment Securities [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	5.4
Other comprehensive income (loss) before reclassifications	0.0
Amounts reclassified out	0.0
Other comprehensive income (loss), net of tax	0.0
Balance, ending	5.4
Defined Benefit Pension and Other Postretirement Plans [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(39.6)
Other comprehensive income (loss) before reclassifications	0.1
Amounts reclassified out	0.3
Other comprehensive income (loss), net of tax	0.4
Balance, ending	(39.2)
Foreign Currency Translation [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(125.3)
Other comprehensive income (loss) before reclassifications	14.9
Amounts reclassified out	0.0
Other comprehensive income (loss), net of tax	14.9
Balance, ending	$ (110.4)