Derivatives and Hedging Activities (Tables)

12 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of fair value and location of outstanding derivative contracts recorded in consolidated balance sheets

The fair value and location of outstanding derivative contracts recorded in the accompanying consolidated balance sheets were as follows as of June 30, 2018 and 2017:

June 30, 2018 ($ in millions)	Interest Rate Swaps		Foreign Currency Contracts		Commodity Contracts		Total Derivatives
Asset Derivatives:
Derivatives designated as hedging instruments:
Other current assets	$	0.1	$	0.4	$	15.3	$	15.8
Other assets	—		—		19.4		19.4
Total asset derivatives	$	0.1	$	0.4	$	34.7	$	35.2
Liability Derivatives:
Derivatives designated as hedging instruments:
Accrued liabilities	$	—	$	0.1	$	—	$	0.1
Other liabilities	2.9		—		0.4		3.3
Total liability derivatives	$	2.9	$	0.1	$	0.4	$	3.4

June 30, 2017 ($ in millions)	Interest Rate Swaps		Foreign Currency Contracts		Commodity Contracts		Total Derivatives
Asset Derivatives:
Derivatives designated as hedging instruments:
Other current assets	$	0.6	$	0.2	$	6.4	$	7.2
Other assets	1.6		—		5.7		7.3
Total asset derivatives	$	2.2	$	0.2	$	12.1	$	14.5
Liability Derivatives:
Derivatives designated as hedging instruments:
Accrued liabilities	$	—	$	1.0	$	12.1	$	13.1
Other liabilities	—		—		6.0		6.0
Total liability derivatives	$	—	$	1.0	$	18.1	$	19.1

Summary of the gains (losses) related to cash flow hedges

The following is a summary of the gains (losses) related to cash flow hedges recognized during the years ended June 30, 2018, 2017 and 2016:

	Amount of Gain (Loss) Recognized in AOCI on Derivatives  (Effective Portion) Years Ended June 30,
($ in millions)	2018			2017			2016
Derivatives in Cash Flow Hedging Relationship:
Commodity contracts	$	41.4		$	9.4		$	(34.0	)
Foreign exchange contracts	(0.4		)	(0.1		)	0.7
Total	$	41.0		$	9.3		$	(33.3	)

	Location of Gain (Loss)   Reclassified from AOCI  into Income	Amount of Gain (Loss) Reclassified from AOCI into Income  (Effective Portion) Years Ended June 30,
($ in millions)	(Effective Portion)	2018			2017			2016
Derivatives in Cash Flow Hedging Relationship:
Commodity contracts	Cost of sales	$	3.8		$	(22.8	)	$	(44.6	)
Foreign exchange contracts	Net sales	(1.0		)	0.5			0.2
Forward interest rate swaps	Interest expense	0.4			0.4			0.4
Total		$	3.2		$	(21.9	)	$	(44.0	)

	Location of (Loss) Gain   Reclassified from AOCI  into Income	Amount of (Loss) Gain Reclassified from AOCI into Income  (Ineffective Portion) Years Ended June 30,
($ in millions)	(Ineffective Portion)	2018			2017		2016
Derivatives in Cash Flow Hedging Relationship:
Commodity contracts	Cost of sales	$	(2.0	)	$	2.0	$	1.5

Schedule of changes in AOCI associated with derivative hedging activities

The changes in AOCI associated with derivative hedging activities during the years ended June 30, 2018, 2017 and 2016 were as follows:

($ in millions)	2018			2017			2016
Balance, beginning	$	(2.3	)	$	(21.8	)	$	(28.5	)
Current period changes in fair value, net of tax	26.9			5.8			(20.8		)
Reclassification to earnings, net of tax	(0.8		)	13.7			27.5
Balance, ending	$	23.8		$	(2.3	)	$	(21.8	)