Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2017		Jun. 30, 2016
Document Period End Date					Jun. 30, 2017
Beginning Balance	$ (296.4)		$ (288.3)		$ (341.3)		$ (318.1)
Other comprehensive (loss) income before reclassifications (1)	83.3		17.9		132.4		46.9
Amounts reclassified from AOCI	0.8		1.0		(3.4)		1.8
Net current-period other comprehensive (loss) income	84.1		18.9		129.0		48.7
Balance at June 30	(212.3)		(269.4)		(212.3)		(269.4)
Translation adjustment
Beginning Balance	(201.9)		(183.0)		(251.2)		(215.6)
Other comprehensive (loss) income before reclassifications (1)	78.2	[1]	21.8	[2]	127.5	[3]	54.4	[4]
Amounts reclassified from AOCI	0.0		0.0		0.0		0.0
Net current-period other comprehensive (loss) income	78.2		21.8		127.5		54.4
Balance at June 30	(123.7)		(161.2)		(123.7)		(161.2)
Foreign Currency Hedges
Beginning Balance	(7.9)		1.4		(5.7)		5.0
Other comprehensive (loss) income before reclassifications (1)	5.6		(3.9)		3.4		(7.5)
Amounts reclassified from AOCI	0.0		0.0		0.0		0.0
Net current-period other comprehensive (loss) income	5.6		(3.9)		3.4		(7.5)
Balance at June 30	(2.3)		(2.5)		(2.3)		(2.5)
Interest Rate Hedges
Beginning Balance	6.3		(0.2)		4.6		(0.1)
Other comprehensive (loss) income before reclassifications (1)	(0.5)		0.0		1.5		0.0
Amounts reclassified from AOCI	(0.1)		0.0		(0.4)		(0.1)
Net current-period other comprehensive (loss) income	(0.6)		0.0		1.1		(0.1)
Balance at June 30	5.7		(0.2)		5.7		(0.2)
Pension and Other Post-retirement Benefits
Beginning Balance	(93.2)		(106.9)		(89.3)		(107.8)
Other comprehensive (loss) income before reclassifications (1)	0.0		0.0		0.0		0.0
Amounts reclassified from AOCI	0.9		1.0		(3.0)		1.9
Net current-period other comprehensive (loss) income	0.9		1.0		(3.0)		1.9
Balance at June 30	(92.3)		(105.9)		(92.3)		(105.9)
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 June 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		$ (0.8)		$ 1.7		$ (0.6)

[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 $(0.8) of translation attributable to noncontrolling interests.

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

[4] Other comprehensive income (loss) before reclassifications within the translation component excludes $(0.6) of translation attributable to noncontrolling interests.