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Property and Equipment - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 10,700 $ 9,700 $ 7,700
Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Impairment charges related to leasehold improvements $ 186    
Building, Building Improvements and Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Committed for construction of new buildings, building improvements and leasehold improvements   $ 5,000