Significant Accounting and Reporting Policies Allowance for Doubtful Accounts (Tables)

9 Months Ended

Sep. 30, 2020

Allowance for Doubtful Accounts [Abstract]

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

The following is a rollforward of the allowance for doubtful accounts for the periods presented:

	Nine Months Ended September 30,
	2020		2019
Beginning Balance	$	19.0	$	13.5
Provision for losses on trade accounts receivable	11.4		7.9
Write-offs, net of recovered accounts	(5.1)		(2.6)
Ending balance	$	25.3	$	18.8