FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Interest rate swaps	$	—	$	11.4	$	—	$	11.4
Commodity contracts	—		6.3		—		6.3
Foreign exchange contracts	—		0.2		—		0.2
Liabilities
Interest rate swaps	$	—	$	29.7	$	—	$	29.7
Commodity contracts	—		0.2		—		0.2
Foreign exchange contracts	—		0.3		—		0.3
Balance at December 31, 2016
Assets
Interest rate swaps	$	—	$	9.6	$	—	$	9.6
Commodity contracts	—		11.5		—		11.5
Foreign exchange contracts	—		0.1		—		0.1
Liabilities
Interest rate swaps	$	—	$	28.6	$	—	$	28.6
Foreign exchange contracts	—		1.2		—		1.2
Balance at March 31, 2016
Assets
Interest rate swaps	$	—	$	0.5	$	—	$	0.5
Liabilities
Interest rate swaps	$	—	$	0.9	$	—	$	0.9
Commodity contracts	—		6.7		—		6.7
Foreign exchange contracts	—		1.5		—		1.5

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, 2017	$	—	$	3,759.2	$	153.0	$	3,912.2	$	3,612.6
Balance at December 31, 2016	—		3,703.7		153.0		3,856.7		3,617.6
Balance at March 31, 2016	—		3,778.5		153.0		3,931.5		3,833.0