Accumulated Other Comprehensive (Loss) Income, Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018		Dec. 31, 2018		Dec. 31, 2017
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive (loss) income before reclassifications	[1]			$ (10.4)		$ (20.7)
Amounts reclassified from accumulated other comprehensive (loss) income	[1]			6.7		6.8
Total other comprehensive loss, net of tax		$ (5.7)	$ (60.1)	(3.7)	[1]	(13.9)	[1]
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]			(247.0)		(199.8)
Ending balance	[1]	(258.9)	(213.4)	(258.9)		(213.4)
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2018-02 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard								$ (8.2)	[1]	$ 0.0
Accumulated Other Comprehensive Income (Loss) [Member] | ASU 2017-12 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard								0.0		0.3	[1]
Foreign Currency Translation Adjustments, Net [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]			(190.6)		(129.6)
Other comprehensive (loss) income before reclassifications	[1]			(6.5)		(33.1)
Amounts reclassified from accumulated other comprehensive (loss) income	[1]			0.0		0.0
Total other comprehensive loss, net of tax	[1]			(6.5)		(33.1)
Ending balance	[1]	(198.6)	(162.7)	(198.6)		(162.7)
Foreign Currency Translation Adjustments, Net [Member] | ASU 2018-02 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]							(1.5)
Foreign Currency Translation Adjustments, Net [Member] | ASU 2017-12 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]									0.0
Unrealized (Losses) Gains on Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]			(11.4)		(29.8)
Other comprehensive (loss) income before reclassifications	[1]			(4.4)		10.1
Amounts reclassified from accumulated other comprehensive (loss) income	[1]			5.8		6.0
Total other comprehensive loss, net of tax	[1]			1.4		16.1
Ending balance	[1]	(16.7)	(13.4)	(16.7)		(13.4)
Unrealized (Losses) Gains on Cash Flow Hedges [Member] | ASU 2018-02 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]							(6.7)
Unrealized (Losses) Gains on Cash Flow Hedges [Member] | ASU 2017-12 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]									0.3
Pension and Postretirement Benefit Plans [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	[1]			(45.0)		(40.4)
Other comprehensive (loss) income before reclassifications	[1]			0.5		2.3
Amounts reclassified from accumulated other comprehensive (loss) income	[1]			0.9		0.8
Total other comprehensive loss, net of tax	[1]			1.4		3.1
Ending balance	[1]	$ (43.6)	$ (37.3)	$ (43.6)		$ (37.3)
Pension and Postretirement Benefit Plans [Member] | ASU 2018-02 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]							$ 0.0
Pension and Postretirement Benefit Plans [Member] | ASU 2017-12 [Member]
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Cumulative effect adjustment upon adoption of new accounting standard	[1]									$ 0.0

[1] All amounts are net of tax. Amounts in parentheses indicate debits.