Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			$ (32.4)
Other comprehensive loss before reclassifications			(3.9)
Amounts reclassified out			1.6
Other comprehensive (loss) income, net of tax	(0.9)	1.0	(2.3)	(15.5)
Balance, ending	(34.7)		(34.7)
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			(0.2)
Amounts reclassified out			0.9
Other comprehensive (loss) income, net of tax			0.7
Balance, ending	(5.3)		(5.3)
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 (loss) income, net of tax			0
Balance, ending	4.3		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			(0.4)
Amounts reclassified out			0.7
Other comprehensive (loss) income, net of tax			0.3
Balance, ending	(46.7)		(46.7)
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			(3.3)
Amounts reclassified out			0
Other comprehensive (loss) income, net of tax			(3.3)
Balance, ending	$ 13.0		$ 13.0