Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	$ (32.4)
Other comprehensive loss before reclassifications	(2.2)
Amounts reclassified out	0.8
Other comprehensive income (loss), net of tax	(1.4)	(16.6)
Balance, ending	(33.8)
Losses on Cash Flow Hedges [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(6.0)
Other comprehensive loss before reclassifications	(0.3)
Amounts reclassified out	0.5
Other comprehensive income (loss), net of tax	0.2
Balance, ending	(5.8)
Unrealized Gains on Investment Securities [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	4.3
Other comprehensive loss before reclassifications	0
Amounts reclassified out	0
Other comprehensive income (loss), net of tax	0
Balance, ending	4.3
Defined Benefit Pension and Other Postretirement Plans [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(47.0)
Other comprehensive loss before reclassifications	(0.1)
Amounts reclassified out	0.3
Other comprehensive income (loss), net of tax	0.2
Balance, ending	(46.8)
Foreign Currency Translation [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	16.3
Other comprehensive loss before reclassifications	(1.8)
Amounts reclassified out	0
Other comprehensive income (loss), net of tax	(1.8)
Balance, ending	$ 14.5