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Debt (Tables)
12 Months Ended
Jun. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Outstanding
Long-term debt outstanding at June 30, 2023 and 2022 consisted of the following: 
 June 30,
($ in millions)20232022
Senior unsecured notes, 6.375% due July 2028 (face value of $400.0 million at June 30, 2023 and 2022)
$396.5 $395.9 
Senior unsecured notes, 7.625% due March 2030 (face value of $300.0 million at June 30, 2023 and 2022)
296.5 295.9 
Total693.0 691.8 
Less: amounts due within one year— — 
Long-term debt, net of current portion$693.0 $691.8