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Accounting Policies - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Jul. 01, 2022
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Significant Accounting Policies [Line Items]        
Operating income   $ 21,518 $ 20,238  
Net income   $ 17,556 $ 20,505  
Income per basic share   $ 2.35 $ 2.73  
Income per diluted share   $ 2.35 $ 2.71  
Other receivables due from suppliers   $ 736   $ 1,000
Long-term accounts receivable, net of allowance for doubtful accounts   3,800   3,800
Financing receivables, net   3,900   $ 4,100
Service Life        
Significant Accounting Policies [Line Items]        
Operating income   1,100    
Net income   $ 859    
Income per basic share   $ 0.12    
Income per diluted share   $ 0.11    
Server Equipment | Service Life        
Significant Accounting Policies [Line Items]        
Estimated useful lives 6 years     4 years
Network Equipment | Service Life        
Significant Accounting Policies [Line Items]        
Estimated useful lives 6 years     4 years