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 |