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Debt (Tables)
12 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt Outstanding
Long-term debt outstanding at June 30, 2022 and 2021 consisted of the following: 
 June 30,
($ in millions)20222021
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at June 30, 2021)
$— $299.5 
Senior unsecured notes, 6.375% due July 2028 (face value of $400.0 million at June 30, 2022 and 2021)
395.9 395.0 
Senior unsecured notes, 7.625% due March 2030 (face value of $300.0 million at June 30, 2022)
295.9 — 
Total691.8 694.5 
Less amounts due within one year— — 
Long-term debt, net of current portion$691.8 $694.5