Annual report [Section 13 and 15(d), not S-K Item 405]

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounting for Non-qualified Deferred Compensation Plan (Details)

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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounting for Non-qualified Deferred Compensation Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]      
Non-qualified deferred compensation plan payout period 15 years    
Income Statement Location: us-gaap:SellingGeneralAndAdministrativeExpense      
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]      
Executive deferred compensation program, compensation expense $ 60.0 $ 41.5 $ 37.2
Net gains on Deferred Savings Plan assets $ 59.4 $ 40.7 $ 36.6