Significant Accounting Policies and Practices - Schedule of Transactions Affecting Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Accounting Policies [Abstract]
Beginning Balance	$ 1.9	$ 1.0	$ 1.0
Provision for credit losses	6.0	$ 0.5	2.1
Write offs and other	(2.7)		(1.2)
Ending Balance	$ 5.2		$ 1.9