FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Table of financial instruments measured at fair value

The following table summarizes the assets and liabilities measured at fair value in the condensed balance sheets:

	Fair Value Measurements
Balance at March 31, 2015	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Interest rate swaps	$	—	$	2.9	$	—	$	2.9
Liabilities
Interest rate swaps	$	—	$	3.8	$	—	$	3.8
Commodity forward contracts	—		8.8		—		8.8
Balance at December 31, 2014
Assets
Interest rate swaps	$	—	$	3.5	$	—	$	3.5
Liabilities
Interest rate swaps	$	—	$	4.5	$	—	$	4.5
Commodity forward contracts	—		8.6		—		8.6
Balance at March 31, 2014
Assets
Interest rate swaps	$	—	$	5.3	$	—	$	5.3
Liabilities
Interest rate swaps	$	—	$	6.6	$	—	$	6.6
Commodity forward contracts	—		3.4		—		3.4

Activity summary of financial instruments measure at fair value using level 3 inputs

The following table summarizes the activity for our earn out liability measured at fair value using Level 3 inputs:

	March 31,
	2015		2014
	($ in millions)
Balance at beginning of year	$	—	$	26.7
Settlements	—		(26.7		)
Balance at end of period	$	—	$	—

Fair value of debt table

The following table summarizes the fair value measurements of debt and the actual debt recorded on our condensed balance sheets:

	Fair Value Measurements								Amount recorded on balance sheets
	Level 1		Level 2		Level 3		Total
	($ in millions)
Balance at March 31, 2015	$	—	$	538.7	$	153.0	$	691.7	$	673.3
Balance at December 31, 2014	—		531.9		153.0		684.9		675.1
Balance at March 31, 2014	—		558.5		153.0		711.5		690.1