Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]
Pre-tax actuarial gain, recognized in AOCI	$ 10.1
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			(75.9)
Other comprehensive (loss) income before reclassifications			(0.8)
Amounts reclassified from AOCI			7.2
Other comprehensive income (loss), net of tax	21.9	17.0	6.4	(0.3)
Balance, ending	(69.5)		(69.5)
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			(2.3)
Amounts reclassified from AOCI			3.7
Other comprehensive income (loss), net of tax			1.4
Balance, ending	(7.6)		(7.6)
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 income (loss), net of tax			0
Balance, ending	0.8		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			6.1
Amounts reclassified from AOCI			3.5
Other comprehensive income (loss), net of tax			9.6
Balance, ending	(75.3)		(75.3)
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			(4.6)
Amounts reclassified from AOCI			0
Other comprehensive income (loss), net of tax			(4.6)
Balance, ending	$ 12.6		$ 12.6