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Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2018
Allowance for Doubtful Accounts [Abstract]  
Allowance for Doubtful Trade Accounts Receivable
The allowance for doubtful trade accounts receivable for the years ended December 31, 2018, 2017 and 2016 consisted of the following.

  
2018
  
2017
  
2016
 
Balance at beginning of the period
 
$
18.7
  
$
18.7
  
$
19.3
 
Provision charged to expense
  
1.8
   
3.5
   
2.7
 
Write-offs, net of recoveries
  
(2.2
)
  
(4.8
)
  
(2.4
)
Charged to other accounts(1)
  
(0.9
)
  
1.3
   
(0.9
)
Balance at end of the period
 
$
17.4
  
$
18.7
  
$
18.7
 


(1)
Primarily includes the effect of foreign currency translation adjustments for the Company's subsidiaries with functional currencies other than the USD.