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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Currency Translation and Transactions (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Currency Translation and Transactions      
Unrealized translation gains (losses), net of tax $ (85) $ (427) $ 147
Net exchange gains (losses) on foreign currency transactions $ 57 $ (11) $ (12)