Accrued Liabilities (Tables)

6 Months Ended

Dec. 31, 2017

Accrued Liabilities, Current [Abstract]

Schedule of accrued liabilities

Accrued liabilities consisted of the following as of December 31, 2017 and June 30, 2017:

($ in millions)	December 31, 2017		June 30, 2017
Accrued compensation and benefits	$	52.6	$	59.1
Accrued postretirement benefits	15.5		15.5
Accrued interest expense	11.2		11.2
Deferred revenue	10.7		9.8
Derivative financial instruments	2.9		13.1
Other	25.5		31.2
Total accrued liabilities	$	118.4	$	139.9