Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016
Beginning Balance	$ (212.3)		$ (269.4)		$ (341.3)		$ (318.1)
Other comprehensive (loss) income before reclassifications (1)	12.0		(4.7)		144.4		42.2
Amounts reclassified from AOCI	1.0		(0.1)		(2.4)		1.7
Net current-period other comprehensive (loss) income	13.0		(4.8)		142.0		43.9
Balance at September 30	(199.3)		(274.2)		(199.3)		(274.2)
Translation adjustment
Beginning Balance	(123.7)		(161.2)		(251.2)		(215.6)
Other comprehensive (loss) income before reclassifications (1)	14.1	[1]	(4.3)	[2]	141.6	[3]	50.1	[4]
Amounts reclassified from AOCI	0.0		0.0		0.0		0.0
Net current-period other comprehensive (loss) income	14.1		(4.3)		141.6		50.1
Balance at September 30	(109.6)		(165.5)		(109.6)		(165.5)
Foreign Currency Hedges
Beginning Balance	(2.3)		(2.5)		(5.7)		5.0
Other comprehensive (loss) income before reclassifications (1)	(2.4)		(0.4)		1.0		(7.9)
Amounts reclassified from AOCI	0.0		0.0		0.0		0.0
Net current-period other comprehensive (loss) income	(2.4)		(0.4)		1.0		(7.9)
Balance at September 30	(4.7)		(2.9)		(4.7)		(2.9)
Interest Rate Hedges
Beginning Balance	5.7		(0.2)		4.6		(0.1)
Other comprehensive (loss) income before reclassifications (1)	0.3		0.0		1.8		0.0
Amounts reclassified from AOCI	0.0		0.0		(0.4)		(0.1)
Net current-period other comprehensive (loss) income	0.3		0.0		1.4		(0.1)
Balance at September 30	6.0		(0.2)		6.0		(0.2)
Pension and Other Post-retirement Benefits
Beginning Balance	(92.3)		(105.9)		(89.3)		(107.8)
Other comprehensive (loss) income before reclassifications (1)	0.0		0.0		0.0		0.0
Amounts reclassified from AOCI	1.0		(0.1)		(2.0)		1.8
Net current-period other comprehensive (loss) income	1.0		(0.1)		(2.0)		1.8
Balance at September 30	(91.3)		(106.0)		(91.3)		(106.0)
Other
Beginning Balance	0.3		0.4		0.3		0.4
Other comprehensive (loss) income before reclassifications (1)	0.0		0.0		0.0		0.0
Amounts reclassified from AOCI	0.0		0.0		0.0		0.0
Net current-period other comprehensive (loss) income	0.0		0.0		0.0		0.0
Balance at September 30	0.3		0.4		0.3		0.4
Translation adjustment
Other comprehensive (loss) income, translation adjustment, net of tax, attributable to noncontrolling interests	$ 1.7		$ 0.1		$ 3.4		$ (0.5)

[1] (1)Other comprehensive income (loss) before reclassifications within the translation component excludes $1.7 of translation attributable to noncontrolling interests.

[2] (1)Other comprehensive income (loss) before reclassifications within the translation component excludes $0.1 of translation attributable to noncontrolling interests.

[3] (1)Other comprehensive income (loss) before reclassifications within the translation component excludes $3.4 of translation attributable to noncontrolling interests.

[4] Other comprehensive income (loss) before reclassifications within the translation component excludes $(0.5) of translation attributable to noncontrolling interests.