Debt (Tables)

9 Months Ended

Mar. 31, 2018

Debt Disclosure [Abstract]

Schedule of long-term debt outstanding

Long-term debt outstanding as of March 31, 2018 and June 30, 2017 consisted of the following:

($ in millions)	March 31, 2018		June 30, 2017
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, 2018 and June 30, 2017)	$	55.0	$	55.0
Senior unsecured notes, 5.20% due July 2021 (face value of $250.0 million at March 31, 2018 and June 30, 2017)	247.3		251.2
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at March 31, 2018 and June 30, 2017)	299.0		298.8
Total	601.3		605.0
Less: amounts due within one year	55.0		55.0
Long-term debt, net of current portion	$	546.3	$	550.0