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ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Tables)
 12 Months Ended
Dec. 31, 2018
Accounts Receivable, Net [Abstract]  
Allowance for Doubtful Accounts Receivable
Allowance for doubtful accounts receivable consisted of the following:
 
December 31,
 
2018
 
2017
 
($ in millions)
Beginning balance
$
12.3

 
$
10.1

Provisions charged
1.7

 
1.8

Write-offs, net of recoveries
(0.7
)
 
(0.1
)
Foreign currency translation adjustments
(0.4
)
 
0.5

Ending balance
$
12.9

 
$
12.3