Debt (Tables)

9 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Schedule of long-term debt outstanding

Long-term debt outstanding as of March 31, 2015 and June 30, 2014 consisted of the following:

($ in millions)	March 31, 2015		June 30, 2014
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, 2015 and June 30, 2014)	$	55.0	$	55.0
Senior unsecured notes, 5.20% due July 2021 (face value of $250.0 million at March 31, 2015 and June 30, 2014)	255.2		249.7
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at March 31, 2015 and June 30, 2014)	299.6		299.6
Total	609.8		604.3
Less: amounts due within one year	—		—
Long-term debt, net of current portion	$	609.8	$	604.3