Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 2,018.5	$ 1,291.9
Other Comprehensive Income before Reclassifications	5.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	1.0
Total Other Comprehensive Income, Net of Tax	6.0	20.0
Ending balance	2,005.3	2,157.8
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(377.9)	(338.8)
Ending balance	(373.2)	$ (322.9)
Derivatives Instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(11.3)
Ending balance	(11.7)
Pension and Postretirement Benefit Plans | Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(246.1)
Ending balance	(244.9)
Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(120.5)
Ending balance	(116.6)
Derivative Instruments Including Portion Attributable to NCI and Redeemable NCI
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income before Reclassifications	0.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	(0.5)
Total Other Comprehensive Income, Net of Tax	(0.5)
Pension and Postretirement Benefit Plan, Including Portion Attributable to NCI and Redeemable NCI | Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income before Reclassifications	0.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	1.5
Total Other Comprehensive Income, Net of Tax	1.5
Currency Translation Adjustment, Including Portion Attributable to NCI and Redeemable NCI
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other Comprehensive Income before Reclassifications	5.0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	0.0
Total Other Comprehensive Income, Net of Tax	5.0
AOCI Attributable to Noncontrolling Interest And Redeemable Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Total Other Comprehensive Income, Net of Tax	(1.3)
Derivative Instruments, Portion Attributable to NCI and Redeemable NCI
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Total Other Comprehensive Income, Net of Tax	0.1
Pension and Postretirement Benefit Plans, Portion Attributable to NCI and Redeemable NCI | Pension and Postretirement Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Total Other Comprehensive Income, Net of Tax	(0.3)
Currency Translation Adjustment, Portion Attributable to NCI and Redeemable NCI
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Total Other Comprehensive Income, Net of Tax	$ (1.1)