Accounts Receivable and Allowance for Credit Losses (Tables)

6 Months Ended

Jun. 30, 2020

Receivables [Abstract]

Schedule of Allowance for Credit Losses

Movements in the allowance for credit losses are as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Beginning balance	$	4.7	$	2.1	$	2.8	$	1.1
Cumulative effect of ASC 326 adoption	—		—		1.1		—
Provision (recoveries)	0.5		0.2		1.3		1.2
Write-offs	—		(0.2)		—		(0.2)
Ending balance	$	5.2	$	2.1	$	5.2	$	2.1