Revenue from Contracts with Customers - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period	$ 49.3	$ 50.9
Provision charged to expense	0.6	2.2
Write-offs, net of recoveries	(0.3)	(3.0)
Foreign currency translation and other	0.3	(0.2)
Balance at end of the period	$ 49.9	$ 49.9