Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	$ (75.9)
Other comprehensive (loss) income before reclassifications	(18.9)
Amounts reclassified from AOCI	2.3
Other comprehensive (loss) income, net of tax	(16.6)	13.0
Balance, ending	(92.5)
Losses on Cash Flow Hedges [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(9.0)
Other comprehensive (loss) income before reclassifications	(1.3)
Amounts reclassified from AOCI	1.0
Other comprehensive (loss) income, net of tax	(0.3)
Balance, ending	(9.3)
Unrealized Gains on Investment Securities [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	0.8
Other comprehensive (loss) income before reclassifications	0
Amounts reclassified from AOCI	0
Other comprehensive (loss) income, net of tax	0
Balance, ending	0.8
Defined Benefit Pension and Other Postretirement Plans [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	(84.9)
Other comprehensive (loss) income before reclassifications	0.8
Amounts reclassified from AOCI	1.3
Other comprehensive (loss) income, net of tax	2.1
Balance, ending	(82.8)
Foreign Currency Translation [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning	17.2
Other comprehensive (loss) income before reclassifications	(18.4)
Amounts reclassified from AOCI	0
Other comprehensive (loss) income, net of tax	(18.4)
Balance, ending	$ (1.2)