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Debt (Tables)
9 Months Ended
Mar. 31, 2020
Debt Disclosure [Abstract]  
Schedule of long-term debt outstanding
Long-term debt outstanding as of March 31, 2020 and June 30, 2019 consisted of the following:
 
($ in millions)
 
March 31,
2020
 
June 30,
2019
Senior unsecured notes, 5.20% due July 2021 (face value of $250.0 million at March 31, 2020 and June 30, 2019)
 
$
252.8

 
$
251.2

Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at March 31, 2020 and June 30, 2019)
 
299.6

 
299.4

Total
 
552.4

 
550.6

Less: amounts due within one year
 

 

Long-term debt, net of current portion
 
$
552.4

 
$
550.6