Allowance for Doubtful Accounts

6 Months Ended

Jun. 30, 2021

Receivables [Abstract]

Allowance For Doubtful Accounts

6. ALLOWANCE FOR DOUBTFUL ACCOUNTS

The allowance for doubtful accounts consisted of the following (in millions):

	June 30,
	2021			2020
Balance at beginning of year	$	3.0		$	3.1
Provision charged to expense		0.2			0.1
Write-offs, less recoveries		(1.0	)		(0.3	)
Balance at end of period	$	2.2		$	2.9