Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Unrecognized Net Defined Benefit Plan Costs
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) reclassification adjustment from AOCI	$ (2.6)	$ (5.2)
Benefit for income taxes	0.7	1.4
Amortization of net actuarial (losses), before tax	(3.0)	(6.0)
Net prior service credit arising during period, before tax	0.4	0.8
Accumulated Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency gains (losses)	29.1	(22.6)
Foreign currency transaction and translation gain (loss) arising during period related to intra-entity transactions of a long-term investment nature, net of tax	0.5	0.9
Foreign currency (losses) gains of net investment hedges included in accumulated other comprehensive loss	(5.2)	18.3
Foreign currency translation, tax benefit (provision) related to net investment hedges	$ 1.3	$ (4.3)