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Restructuring Charges and Asset Impairment Charges (Tables)
 12 Months Ended
Jun. 30, 2022
Restructuring and Related Activities [Abstract]  
Restructuring and related costs
The reserve balances and activity for restructuring charges at June 30, 2022 and 2021 were as follows:

 June 30,
($ in millions)20222021
Reserve balance beginning of year$1.4 $9.5 
Restructuring charges excluding non-cash impairments— 1.2 
Cash payments(1.4)(9.3)
Reserve balance end of year$— $1.4