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Revenue Classified by Major Geographic Areas (Detail) - USD ($)
$ in Millions
 3 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues $ 37,154 $ 33,055
United States    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues [1] 19,025 17,270
Other Countries    
Revenues From External Customers And Long Lived Assets [Line Items]    
Revenues $ 18,129 $ 15,785
[1] Includes billings to OEMs and certain multinational organizations because of the nature of these businesses and the impracticability of determining the geographic source of the revenue.