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Debt - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended
Dec. 31, 2023
Jun. 30, 2023
Debt Instrument [Line Items]    
Long-term debt fair value $ 46,600 $ 46,200
Short-term debt $ 27,041 $ 0
Commercial Paper    
Debt Instrument [Line Items]    
Short term debt, weighted average interest rate 5.50%  
Commercial Paper | Maximum    
Debt Instrument [Line Items]    
Short term borrowings maturity 216 days  
Commercial Paper | Minimum    
Debt Instrument [Line Items]    
Short term borrowings maturity 33 days