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Allowance for Doubtful Accounts (Detail) - Allowance for doubtful accounts - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance, beginning of period $ 434 $ 397 $ 361
Charged to costs and other 560 153 134
Write-offs (178) (116) (98)
Balance, end of period 816 434 397
Accounts receivable, net of allowance for doubtful accounts      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance, beginning of period 411 377  
Balance, end of period 788 411 377
Other Long-term Assets      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance, beginning of period 23 20  
Balance, end of period $ 28 $ 23 $ 20