Revenue from Contracts with Customers - Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period	$ 49.2	$ 50.9
Provision charged to expense	1.3	1.6
Write-offs, net of recoveries	(1.7)	(2.7)
Foreign currency translation and other	0.5	(0.5)
Balance at end of the period	$ 49.3	$ 49.3