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Debt (Tables)
3 Months Ended
Sep. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Outstanding
Long-term debt outstanding as of September 30, 2023 and June 30, 2023 consisted of the following:
($ in millions)September 30,
2023
June 30,
2023
Senior unsecured notes, 6.375% due July 2028 (face value of $400.0 million at September 30, 2023 and June 30, 2023)
$396.7 $396.5 
Senior unsecured notes, 7.625% due March 2030 (face value of $300.0 million at September 30, 2023 and June 30, 2023)
296.6 296.5 
Total debt693.3 693.0 
Less: amounts due within one year— — 
Long-term debt, net of current portion$693.3 $693.0