Summary of Significant Accounting Policies - Summary of Rollforward of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Balance at Beginning of Year	$ 113.5	$ 115.7	$ 110.8
Provisions Charged to Earnings	20.3	21.8	23.0
Write-Offs	(17.8)	(19.1)	(12.0)
Translation Adjustments	8.1	(5.0)	(6.3)
Reclassifications and Other	4.0	0.1	0.2
Balance at End of Year	$ 128.1	$ 113.5	$ 115.7