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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Reserves deducted in the balance sheet from the assets to which they apply:      
Change in opening balance $ (6,091) $ (3,962) $ (4,411)
Cumulative effect of adoption of new accounting standards | Accounting Standards Update 2016-13      
Reserves deducted in the balance sheet from the assets to which they apply:      
Change in opening balance   4  
Allowance for doubtful accounts and customer deductions:      
Reserves deducted in the balance sheet from the assets to which they apply:      
Balance at Beginning of Period 63 32 29
Additions Charged to Costs and Expenses (5) 45 27
Additions Charged to Other Accounts 4 0 0
Deductions 22 14 24
Balance at End of Period 40 63 32
Deferred tax valuation allowance:      
Reserves deducted in the balance sheet from the assets to which they apply:      
Balance at Beginning of Period 107 49 45
Additions Charged to Costs and Expenses 61 32 11
Additions Charged to Other Accounts 1 28 0
Deductions 1 2 7
Balance at End of Period $ 168 $ 107 $ 49