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Restructuring Charges and Asset Impairment Charges (Tables)
12 Months Ended
Jun. 30, 2023
Restructuring and Related Activities [Abstract]  
Summary of Restructuring Charges
The reserve balances and activity for restructuring charges at June 30, 2023 and 2022 were as follows:

 June 30,
($ in millions)20232022
Reserve balance beginning of year$— $1.4 
Cash payments— (1.4)
Reserve balance end of year$— $—