XML 122 R55.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Supplementary Data Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts (Tables)
 12 Months Ended
Dec. 31, 2019
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts [Abstract]  
Valuation and Qualifying Accounts - Allowance for Uncollectible Accounts Receivable
Valuation and Qualifying Accounts – Allowance for Uncollectible Accounts Receivable
 
Years ended December 31,
 
2019
 
2018
 
2017
Balance at beginning of period
$
42.5

 
$
42.7

 
$
55.7

Charges to costs and expenses
10.1

 
6.5

 
9.5

Adjustments:
 
 
 
 
 
Acquisitions/(dispositions)
(0.3
)
 
2.2

 
(1.0
)
Uncollectible accounts written off
(11.9
)
 
(7.1
)
 
(25.5
)
Foreign currency translation adjustments
(0.2
)
 
(1.8
)
 
4.0

Balance at end of period
$
40.2

 
$
42.5

 
$
42.7