Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 22.8
Foreign currency translation	0.4
Provision for credit losses	23.0	$ 9.5	$ 4.7
Write-offs charged against the allowance	(9.1)
Ending balance	$ 37.1	$ 22.8