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RISK MANAGEMENT ACTIVITIES AND FAIR VALUE MEASUREMENTS - Gains And Losses On Derivatives In Net Investment Hedges Recognized in OCI (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Amount of gain (loss) excluded from effectiveness testing, which was recognized in earnings $ 226 $ 229
Gain/(loss) recognized in AOCI (1,050) 255
Foreign currency contracts    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Amount of Gain/(Loss) Recognized in OCI on Derivatives $ (1,040) $ 163