Stockholders' Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss)
December 31, 2015				$ (872.7)
Other comprehensive income (loss) before reclassifications, net of tax				71.4
Reclassification adjustment for net losses (gains) included in net income, net of tax				56.1
Other comprehensive income (loss), net of tax		$ 17.3	$ (125.6)	127.5	$ (173.3)
September 30, 2016		(745.2)		(745.2)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss)
December 31, 2015				(494.2)
Other comprehensive income (loss) before reclassifications, net of tax				54.6
Other comprehensive income (loss), net of tax	[1]			54.6
September 30, 2016		(439.6)		(439.6)
Hedging
Accumulated Other Comprehensive Income (Loss)
December 31, 2015				(87.1)
Other comprehensive income (loss) before reclassifications, net of tax				16.8
Reclassification adjustment for net losses (gains) included in net income, net of tax				41.7
Other comprehensive income (loss), net of tax	[2]			58.5
September 30, 2016		(28.6)		(28.6)
Defined Pension and Other Post-retirement Benefits
Accumulated Other Comprehensive Income (Loss)
December 31, 2015				(291.4)
Reclassification adjustment for net losses (gains) included in net income, net of tax				14.4
Other comprehensive income (loss), net of tax	[3]			14.4
September 30, 2016		$ (277.0)		$ (277.0)

[1] Net of income tax (expense) benefit of $0.3 and nil for the three months ended September 30, 2016 and 2015, respectively, and $0.7 and $6.8 for the nine months ended September 30, 2016 and 2015, respectively.

[2] Net of income tax (expense) benefit of $(4.9) and $5.5 for the three months ended September 30, 2016 and 2015, respectively, and $(16.0) and $1.9 for the nine months ended September 30, 2016 and 2015, respectively.

[3] Net of income tax (expense) benefit of $(2.6) and $(3.1) for the three months ended September 30, 2016 and 2015, respectively, and $(6.5) and $(8.1) for the nine months ended September 30, 2016 and 2015, respectively.