Significant Accounting Policies and Practices - Schedule of Transactions Affecting Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Beginning Balance	$ 1.9	$ 1.0
Provision for credit losses	6.4	1.1	$ 1.5
Write offs and other	(3.2)	(0.2)
Ending Balance	$ 5.1	$ 1.9	$ 1.0