Significant Accounting Policies and Practices - Schedule of Transactions Affecting Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Accounting Policies [Abstract]
Beginning Balance	$ 1.9	$ 1.0	$ 1.0
Provision for credit losses	5.6	$ 0.3	2.1
Write offs and other	(2.5)		(1.2)
Ending Balance	$ 5.0		$ 1.9