Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended								9 Months Ended
	Sep. 30, 2019		Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018		Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019		Sep. 30, 2018
Beginning Balance	$ (286.2)			$ (303.7)	$ (273.5)			$ (196.3)	$ (303.7)		$ (196.3)
Adoption of accounting standard								33.6
Other comprehensive (loss) income before reclassifications (1)									(81.2)		(69.9)
Amounts reclassified from AOCI	3.0				(1.0)				7.8		3.7
Net current-period other comprehensive (loss) income									(73.4)		(95.2)
Balance at March 31	(377.1)		$ (286.2)		(291.5)		$ (273.5)		(377.1)		(291.5)
Translation adjustment
Beginning Balance	(173.3)			(191.5)	(187.5)			(116.8)	(191.5)		(116.8)
Other comprehensive (loss) income before reclassifications (1)	(90.7)	[1],[2]			(18.6)	[3]			(72.5)	[1]	(80.2)
Amounts reclassified from AOCI	0.0				0.0				0.0		0.0
Net current-period other comprehensive (loss) income	(90.7)				(18.6)				(72.5)		(89.3)
Balance at March 31	(264.0)		(173.3)		(206.1)		(187.5)		(264.0)		(206.1)
Foreign Currency Hedges
Beginning Balance	(1.8)			(1.9)	(0.2)			(5.1)	(1.9)		(5.1)
Other comprehensive (loss) income before reclassifications (1)	(0.2)				2.1				(0.1)		8.0
Amounts reclassified from AOCI	0.0				0.0				0.0		0.0
Net current-period other comprehensive (loss) income	(0.2)				2.1				(0.1)		7.0
Balance at March 31	(2.0)		(1.8)		1.9		(0.2)		(2.0)		1.9
Interest Rate Hedges
Beginning Balance	5.9			10.6	13.3			8.1	10.6		8.1
Other comprehensive (loss) income before reclassifications (1)	(3.0)				(0.5)				(8.7)		2.3
Amounts reclassified from AOCI	0.8				1.0				1.8		2.1
Net current-period other comprehensive (loss) income	(2.2)				0.5				(6.9)		5.7
Balance at March 31	3.7		5.9		13.8		13.3		3.7		13.8
Pension and Other Post-retirement Benefits
Beginning Balance	(117.2)			(121.0)	(99.2)			(82.6)	(121.0)		(82.6)
Other comprehensive (loss) income before reclassifications (1)	0.0				0.0				0.0		0.0
Amounts reclassified from AOCI	2.2				(2.0)				6.0		1.6
Net current-period other comprehensive (loss) income	2.2				(2.0)				6.0		(18.6)
Balance at March 31	(115.0)		(117.2)		(101.2)		(99.2)		(115.0)		(101.2)
Other
Beginning Balance	0.2			0.1	0.1			0.1	0.1		0.1
Other comprehensive (loss) income before reclassifications (1)	0.0				0.0				0.1		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				0.1		0.0
Balance at March 31	0.2		0.2		0.1		0.1		0.2		0.1
AOCI Attributable to Parent
Beginning Balance				(303.7)					(303.7)
Net current-period other comprehensive (loss) income	(90.9)		$ 18.6	$ (1.1)	(18.0)		$ (68.0)	$ (9.2)
AOCI Attributable to Parent | Accounting Standards Update 2018-02
Adoption of accounting standard	0.0				0.0				0.0		(29.0)
Translation adjustment
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	$ (1.0)				$ (1.1)				$ (0.8)		(2.6)
Accumulated Other Comprehensive Loss [Member] | Accounting Standards Update 2018-02
Adoption of accounting standard											(29.0)
Accumulated Other Comprehensive Loss [Member] | Translation adjustment | Accounting Standards Update 2018-02
Adoption of accounting standard											(9.1)
Accumulated Other Comprehensive Loss [Member] | Foreign Currency Hedges | Accounting Standards Update 2018-02
Adoption of accounting standard											(1.0)
Accumulated Other Comprehensive Loss [Member] | Pension and Other Post-retirement Benefits | Accounting Standards Update 2018-02
Adoption of accounting standard											(20.2)
Accumulated Other Comprehensive Loss [Member] | Other | Accounting Standards Update 2018-02
Adoption of accounting standard											0.0
Accumulated Other Comprehensive Loss [Member] | Accumulated Net Gain (Loss) from Interest Rate Hedge [Member] | Accounting Standards Update 2018-02
Adoption of accounting standard											$ 1.3

[1] ⁽¹⁾ Other comprehensive income (loss) before reclassifications within the translation component excludes $(0.8) of translation attributable to noncontrolling interests.

[2] ⁽¹⁾ Other comprehensive income (loss) before reclassifications within the translation component excludes $(1.0) of translation attributable to noncontrolling interests.

[3] ⁽¹⁾ Other comprehensive income (loss) before reclassifications within the translation component excludes $(1.1) of translation attributable to noncontrolling interests.