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Allowance for Credit Losses Valuation and Qualifying Accounts Schedule (Tables)
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
The following table summarizes the Company’s allowances for doubtful accounts:
 
2018
 
2017
 
2016
Balance at January 1
$
71.7

 
$
50.4

 
$
31.7

Charged to costs and expenses
22.8

 
54.9

 
22.9

Charged to other accounts (1)
(4.1
)
 
1.4

 
1.7

Deductions (2)
(32.2
)
 
(35.0
)
 
(5.9
)
Balance at December 31
$
58.2

 
$
71.7

 
$
50.4