FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2017	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Interest rate swaps	$	—	$	8.7	$	—	$	8.7
Commodity contracts	—		7.4		—		7.4
Foreign exchange contracts	—		0.2		—		0.2
Liabilities
Interest rate swaps	$	—	$	23.9	$	—	$	23.9
Commodity contracts	—		2.6		—		2.6
Foreign exchange contracts	—		0.1		—		0.1
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 September 30, 2016
Assets
Interest rate swaps	$	—	$	2.5	$	—	$	2.5
Commodity contracts	—		0.9		—		0.9
Foreign exchange contracts	—		—		—		—
Liabilities
Interest rate swaps	$	—	$	2.5	$	—	$	2.5
Commodity contracts	—		3.9		—		3.9
Foreign exchange contracts	—		0.8		—		0.8

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 September 30, 2017	$	—	$	3,920.5	$	153.0	$	4,073.5	$	3,745.2
Balance at December 31, 2016	—		3,703.7		153.0		3,856.7		3,617.6
Balance at September 30, 2016	—		3,732.7		153.0		3,885.7		3,677.8