FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value, by Balance Sheet Grouping [Table Text Block]

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

Balance at December 31, 2015	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets	($ in millions)
Interest rate swaps	$	—	$	1.1	$	—	$	1.1
Foreign exchange contracts	—		0.1		—		0.1
Liabilities
Interest rate swaps	—		1.6		—		1.6
Commodity forward contracts	—		11.6		—		11.6
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

Activity summary of financial instruments measured 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:

	December 31,
	2015		2014
	($ in millions)
Beginning balance	$	—	$	26.7
Settlements	—		(26.7		)
Ending balance	$	—	$	—

Fair Value Of Debt Table [Table Text Block]

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

	Fair Value Measurements
	Level 1		Level 2		Level 3		Total		Amount recorded on balance sheets
	($ in millions)
Balance at December 31, 2015	$	—	$	3,826.9	$	153.0	$	3,979.9	$	3,881.7
Balance at December 31, 2014	—		531.9		153.0		684.9		675.1