Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Beginning Balance	$ (420.5)	$ (434.4)	$ (412.9)	$ (375.3)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(25.7)	(7.3)	(36.3)	(80.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	2.2	1.7	5.2	16.1
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(23.5)	(5.6)	(31.1)	(64.7)
Ending Balance	(444.0)	(440.0)	(444.0)	(440.0)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	0.1		(0.6)	1.4
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	2.6	2.1	6.4	11.2
Translation adjustment
Beginning Balance	(270.8)	(284.3)	(256.7)	(231.5)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(28.3)	(9.9)	(42.4)	(62.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(28.3)	(9.9)	(42.4)	(62.7)
Ending Balance	(299.1)	(294.2)	(299.1)	(294.2)
Foreign Currency Hedges
Beginning Balance	(2.3)	(0.4)	(2.6)	(2.6)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.6	(0.4)	0.9	1.8
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.6	(0.4)	0.9	1.8
Ending Balance	(1.7)	(0.8)	(1.7)	(0.8)
Interest Rate Hedges
Beginning Balance	(2.8)	(11.6)	(6.1)	5.2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2.0	3.0	6.1	(19.1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(0.4)	(0.4)	(1.2)	4.9
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1.6	2.6	4.9	(14.2)
Ending Balance	(1.2)	(9.0)	(1.2)	(9.0)
Pension and Other Post-retirement Benefits
Beginning Balance	(143.1)	(137.5)	(146.9)	(146.6)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.0	0.0	0.0	0.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(2.6)	(2.1)	6.4	11.2
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	2.6	2.1	6.4	11.2
Ending Balance	(140.5)	(135.4)	(140.5)	(135.4)
Other
Beginning Balance	(1.5)	(0.6)	(0.6)	0.2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0.0	0.0	(0.9)	(0.8)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0.0	0.0	(0.9)	(0.8)
Ending Balance	$ (1.5)	$ (0.6)	$ (1.5)	$ (0.6)