Debt (Tables)

9 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of long-term debt outstanding

Long-term debt outstanding as of March 31, 2017 and June 30, 2016 consisted of the following:

($ in millions)	March 31, 2017		June 30, 2016
Medium-term notes, Series B at 6.97% to 7.10% due from April 2018 to May 2018 (face value of $55.0 million at March 31, 2017 and June 30, 2016)	$	55.0	$	55.0
Senior unsecured notes, 5.20% due July 2021 (face value of $250.0 million at March 31, 2017 and June 30, 2016)	250.4		257.8
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at March 31, 2017 and June 30, 2016)	298.7		298.5
Total	604.1		611.3
Less: amounts due within one year	—		—
Long-term debt, net of current portion	$	604.1	$	611.3