Debt (Tables)

6 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of long-term debt outstanding

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

($ in millions)	December 31, 2015		June 30, 2015
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 December 31, 2015 and June 30, 2015)	$	55.0	$	55.0
Senior unsecured notes, 5.20% due July 2021 (face value of $250.0 million at December 31, 2015 and June 30, 2015)	253.7		252.5
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at December 31, 2015 and June 30, 2015)	299.7		299.6
Total	608.4		607.1
Less: amounts due within one year	—		—
Long-term debt, net of current portion	$	608.4	$	607.1