Fair Value Measurements (Tables)

6 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Schedule of fair value of assets and liabilities measured on a recurring basis

The following tables present the Company’s assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy:

December 31, 2017	Fair Value Measurements Using Input Type
($ in millions)	Level 2
Assets:
Marketable securities:
Municipal auction rate securities	$	3.5
Derivative financial instruments	31.7
Total assets	$	35.2
Liabilities:
Derivative financial instruments	$	4.1

June 30, 2017	Fair Value Measurements Using Input Type
($ in millions)	Level 2
Assets:
Marketable securities:
Municipal auction rate securities	$	3.4
Derivative financial instruments	14.5
Total assets	$	17.9
Liabilities:
Derivative financial instruments	$	19.1

Schedule of carrying amounts and estimated fair values of financial instruments not recorded at fair value in the financial statements

The carrying amounts and estimated fair values of the Company’s financial instruments not recorded at fair value in the financial statements were as follows:

	December 31, 2017				June 30, 2017
($ in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current portion	$	603.3	$	622.0	$	605.0	$	622.5
Company-owned life insurance	$	16.0	$	16.0	$	15.9	$	15.9