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OTHER CONTINGENCIES, GUARANTEES AND COMMITMENTS - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024
Loss Contingencies [Line Items] |  |
Liability for aggregate future remediation costs | $ 27 | $ 28
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Accounts payable and accrued liabilities, Other Liabilities, Noncurrent | Accounts payable and accrued liabilities, Other Liabilities, Noncurrent
Letter of credit | $ 18 | $ 18
Letter of credit, amount outstanding | 0 | 0
Alameda County, California Matter |  |
Loss Contingencies [Line Items] |  |
Liability for aggregate future remediation costs | $ 12 | 12
Remediation period (in years) | 30 years |
Maximum undiscounted costs | $ 28 |
Dickinson County, Michigan Matter |  |
Loss Contingencies [Line Items] |  |
Liability for aggregate future remediation costs | $ 10 | $ 10
Remediation period (in years) | 30 years |
Percentage of liability for aggregate remediation and associated costs, other than legal fees | 24.30% |

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