Accumulated Other Comprehensive Income (Loss) ("AOCI") Table 1 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	$ (1,545.5)
As of March 31, 2017	(1,470.2)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	(994.1)
Foreign currency translation adjustments	75.2
Unrealized gain (loss) on derivative and non-derivative financial instruments	0.0
Reclassification of derivative (gain) loss to income	0.0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	0.0
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0.0
Tax benefit (expense)	6.0
As of March 31, 2017	(912.9)
Gain (loss) on derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	21.2
Foreign currency translation adjustments	0.0
Unrealized gain (loss) on derivative and non-derivative financial instruments	(12.2)
Reclassification of derivative (gain) loss to income	0.0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	0.0
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0.0
Tax benefit (expense)	3.6
As of March 31, 2017	12.6
Pension and postretirement benefit adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	(502.7)
Foreign currency translation adjustments	0.0
Unrealized gain (loss) on derivative and non-derivative financial instruments	0.0
Reclassification of derivative (gain) loss to income	0.0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	2.3
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	0.0
Tax benefit (expense)	(0.7)
As of March 31, 2017	(501.1)
Equity method investments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	(69.9)
Foreign currency translation adjustments	0.0
Unrealized gain (loss) on derivative and non-derivative financial instruments	0.0
Reclassification of derivative (gain) loss to income	0.0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	0.0
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	1.5
Tax benefit (expense)	(0.4)
As of March 31, 2017	(68.8)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
As of December 31, 2016	(1,545.5)
Foreign currency translation adjustments	75.2
Unrealized gain (loss) on derivative and non-derivative financial instruments	(12.2)
Reclassification of derivative (gain) loss to income	0.0
Amortization of net prior service (benefit) cost and net actuarial (gain) loss to income	2.3
Ownership share of unconsolidated subsidiaries' other comprehensive income (loss)	1.5
Tax benefit (expense)	8.5
As of March 31, 2017	$ (1,470.2)