Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Unrecognized Net Defined Benefit Plan Costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) reclassification adjustment from AOCI	$ (2.4)	$ (7.3)
Benefit for income taxes	0.6	1.9
Amortization of net actuarial (losses), before tax	(2.9)	(8.6)
Net prior service credit arising during period, before tax	0.4	1.3
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency gains (losses)	42.4	19.4
Foreign currency transaction and translation gain (loss) arising during period related to intra-entity transactions of a long-term investment nature, net of tax	(0.4)	(3.3)
Foreign currency transaction and translation gain (loss) related to net investment hedges, before reclassification and tax	(25.2)	(41.4)
Foreign currency translation, tax benefit (provision) related to net investment hedges	$ 6.0	$ 9.8