Reclassifications out of Accumulated Other Comprehensive Income - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	$ 18.3	$ (38.1)	$ 8.5
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(4.6)	(62.5)	88.3
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(14.6)	5.5	17.1
Other Comprehensive Income (Loss), Net of Tax	(37.5)	(18.9)	96.9
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax - Beginning Balance	(213.9)	(252.0)	(243.5)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(61.5)	41.9	(20.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	5.6	(8.4)	5.5
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	12.5	6.0	8.2
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax	(2.6)	(1.4)	(2.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(46.0)	38.1	(8.5)
Accumulated Other Comprehensive Income (Loss), Net of Tax - Ending Balance	(259.9)	(213.9)	(252.0)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax - Beginning Balance	(96.6)	(34.1)	(122.4)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(4.6)	(62.7)	88.3
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0.0	0.0	0.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0.0	0.2	0.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax	0.0	0.0	0.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(4.6)	(62.5)	88.3
Accumulated Other Comprehensive Income (Loss), Net of Tax - Ending Balance	(101.2)	(96.6)	(34.1)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax - Beginning Balance	(1.1)	(6.6)	(23.7)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax	(19.0)	5.4	12.0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	6.3	(0.2)	(0.2)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	(1.7)	(0.4)	5.3
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(0.2)	0.7	0.0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	(14.6)	5.5	17.1
Accumulated Other Comprehensive Income (Loss), Net of Tax - Ending Balance	(15.7)	(1.1)	(6.6)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax - Beginning Balance	(311.6)	(292.7)	(389.6)
Other Comprehensive Income (Loss) Arising During Period, Total, Before Tax	(85.1)	(15.4)	80.2
Other Comprehensive Income (Loss), Defined Benefit Plans, before Reclassification Adjustments, Tax	11.9	(8.6)	5.3
Other Comprehensive Income (Loss), Reclassification Adjustments, Total, Before Tax	10.8	5.8	13.5
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Defined Benefit Plans, Tax	(2.8)	(0.7)	(2.1)
Other Comprehensive Income (Loss), Net of Tax	(65.2)	(18.9)	96.9
Accumulated Other Comprehensive Income (Loss), Net of Tax - Ending Balance	$ (376.8)	$ (311.6)	$ (292.7)