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Components of Other Income (Expense), Net (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Other Income And Expenses [Abstract]        
Interest and dividends income $ 545 $ 688 $ 1,115 $ 1,412
Interest expense (571) (654) (1,160) (1,291)
Net recognized gains on investments 359 162 484 105
Net gains (losses) on derivatives (5) 41 (2) 87
Net gains (losses) on foreign currency remeasurements 42 (24) 181 (82)
Other, net 70 (19) 70 (37)
Total $ 440 $ 194 $ 688 $ 194