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Debt (Tables)
9 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Schedule of long-term debt outstanding
Long-term debt outstanding as of March 31, 2022 and June 30, 2021 consisted of the following:
 
($ in millions)March 31,
2022
June 30,
2021
Senior unsecured notes, 4.45% due March 2023 (face value of $300.0 million at March 31, 2022 and June 30, 2021)
$299.7 $299.5 
Senior unsecured notes, 6.375% due July 2028 (face value of $400.0 million at March 31, 2022 and June 30, 2021)
395.6 395.0 
Senior unsecured notes, 7.625% due March 2030 (face value of $300.0 million at March 31, 2022)
295.6 — 
Total debt990.9 694.5 
Less: amounts due within one year300.0 — 
Long-term debt, net of current portion$690.9 $694.5