Stockholders' Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax		$ (872.7)	$ (683.7)	$ (340.7)
Other comprehensive income (loss) before reclassifications, net of tax		(268.2)	(370.4)
Reclassification adjustment for net (gains) losses included in net income, net of tax		79.2	27.4
Other comprehensive income (loss), net of tax		(189.0)	(343.0)	55.3
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax		(494.2)	(311.9)	(204.3)
Other comprehensive income (loss) before reclassifications, net of tax		(182.3)	(107.6)
Other comprehensive income (loss), net of tax	[1]	(182.3)	(107.6)
Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax		(87.1)	(77.3)	31.9
Other comprehensive income (loss) before reclassifications, net of tax		(64.9)	(108.4)
Reclassification adjustment for net (gains) losses included in net income, net of tax		55.1	(0.8)
Other comprehensive income (loss), net of tax	[2]	(9.8)	(109.2)
Defined Pension and Other Post-retirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), net of tax		(291.4)	(294.5)	$ (168.3)
Other comprehensive income (loss) before reclassifications, net of tax		(21.0)	(154.4)
Reclassification adjustment for net (gains) losses included in net income, net of tax		24.1	28.2
Other comprehensive income (loss), net of tax	[3]	$ 3.1	$ (126.2)

[1] Net of income tax (expense) benefit of $7.9, $7.2 and $(1.6) for the years ended December 31, 2015, 2014 and 2013, respectively.

[2] Net of income tax benefit of $3.3, $25.7 and $1.0 for the years ended December 31, 2015, 2014 and 2013, respectively.

[3] Net of income tax (expense) benefit of $(4.1), $56.9 and $(81.8) for the years ended December 31, 2015, 2014 and 2013, respectively.