FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2019

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 June 30, 2019	Level 1		Level 2		Level 3		Total
Assets	($ in millions)
Interest rate swaps	$	—	$	1.7	$	—	$	1.7
Commodity contracts	—		0.7		—		0.7
Foreign exchange contracts	—		0.1		—		0.1
Total assets	$	—	$	2.5	$	—	$	2.5
Liabilities
Interest rate swaps	$	—	$	9.0	$	—	$	9.0
Commodity contracts	—		20.0		—		20.0
Foreign exchange contracts	—		0.7		—		0.7
Total liabilities	$	—	$	29.7	$	—	$	29.7
Balance at December 31, 2018
Assets
Interest rate swaps	$	—	$	5.3	$	—	$	5.3
Commodity contracts	—		0.7		—		0.7
Foreign exchange contracts	—		0.4		—		0.4
Total assets	$	—	$	6.4	$	—	$	6.4
Liabilities
Interest rate swaps	$	—	$	33.7	$	—	$	33.7
Commodity contracts	—		3.4		—		3.4
Foreign exchange contracts	—		0.5		—		0.5
Total liabilities	$	—	$	37.6	$	—	$	37.6
Balance at June 30, 2018
Assets
Interest rate swaps	$	—	$	11.2	$	—	$	11.2
Commodity contracts	—		4.3		—		4.3
Foreign exchange contracts	—		1.2		—		1.2
Total assets	$	—	$	16.7	$	—	$	16.7
Liabilities
Interest rate swaps	$	—	$	44.1	$	—	$	44.1
Commodity contracts	—		0.9		—		0.9
Foreign exchange contracts	—		0.5		—		0.5
Total liabilities	$	—	$	45.5	$	—	$	45.5

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 June 30, 2019	$	—	$	3,262.6	$	153.0	$	3,415.6	$	3,233.7
Balance at December 31, 2018	—		3,137.2		153.0		3,290.2		3,230.3
Balance at June 30, 2018	—		3,521.6		153.0		3,674.6		3,513.5