ALLOWANCE FOR DOUBTFUL ACCOUNTS RECEIVABLES (Tables)

12 Months Ended

Dec. 31, 2017

Accounts Receivable, Net [Abstract]

Allowance for Doubtful Accounts Receivable

Allowance for doubtful accounts receivable consisted of the following:

	December 31,
	2017			2016
	($ in millions)
Beginning balance	$	10.1		$	6.4
Provisions charged	2.3			4.5
Write-offs, net of recoveries	(0.1		)	(0.8		)
Ending balance	$	12.3		$	10.1