Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Summary of Allowance for Doubtful Accounts and Revenue Adjustments [Table Text Block]

Allowance for Doubtful Accounts, Revenue Adjustments and Other for the Years Ended:	Balance at Beginning of Year		Charged to Expense/ Against Revenue		Write-Offs, Net of Recoveries			Balance at End of Year
December 31, 2017		13.4		29.3		(18.7	)		24.0
December 31, 2018		24.0		35.7		(23.9	)		35.8
December 31, 2019		35.8		34.2		(47.5	)		22.5