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Components of Other Income (Expense), Net (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Other Income And Expenses [Abstract]      
Interest and dividends income $ 2,680 $ 2,762 $ 2,214
Interest expense (2,591) (2,686) (2,733)
Net recognized gains on investments 32 648 2,399
Net gains (losses) on derivatives 187 144 (187)
Net losses on foreign currency remeasurements (191) (82) (218)
Other, net (40) (57) (59)
Total $ 77 $ 729 $ 1,416