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ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES
 12 Months Ended
Dec. 31, 2014
Accounts Receivable, Net [Abstract]  
ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES
ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES

Allowance for doubtful accounts receivable consisted of the following:
 
December 31,
 
2014
 
2013
 
($ in millions)
Beginning balance
$
3.4

 
$
3.6

Provisions charged
0.2

 
—

Write-offs, net of recoveries
(0.6
)
 
(0.2
)
Ending balance
$
3.0

 
$
3.4