Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			$ (119.2)
Other comprehensive income (loss) before reclassifications			(68.1)
Amounts reclassified out			32.9
Other comprehensive income (loss), net of tax	$ 5.8	$ (36.6)	(35.2)	$ (38.9)
Balance, ending	(154.4)		(154.4)
Gains (Losses) on Cash Flow Hedges [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			(4.3)
Other comprehensive income (loss) before reclassifications			1.3
Amounts reclassified out			0.2
Other comprehensive income (loss), net of tax			1.5
Balance, ending	(2.8)		(2.8)
Unrealized Gains on Investment Securities [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			4.7
Other comprehensive income (loss) before reclassifications			0.0
Amounts reclassified out			0.0
Other comprehensive income (loss), net of tax			0.0
Balance, ending	4.7		4.7
Defined Benefit Pension and Other Postretirement Plans [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			(64.6)
Other comprehensive income (loss) before reclassifications			(11.4)
Amounts reclassified out			32.7
Other comprehensive income (loss), net of tax			21.3
Balance, ending	(43.3)		(43.3)
Foreign Currency Translation [Member]
Changes in the Components of Accumulated Other Comprehensive Loss, Net of Tax [Roll Forward]
Balance, beginning			(55.0)
Other comprehensive income (loss) before reclassifications			(58.0)
Amounts reclassified out			0.0
Other comprehensive income (loss), net of tax			(58.0)
Balance, ending	$ (113.0)		$ (113.0)