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Share Repurchases (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Share Repurchase Program 2021            
Share Repurchases [Line Items]            
Shares of common stock repurchased 20,000,000 17,000,000     37,000,000  
Value of common stock repurchased $ 4,600 $ 4,600     $ 9,200  
Share Repurchase Program 2019            
Share Repurchases [Line Items]            
Shares of common stock repurchased       21,000,000    
Value of common stock repurchased       $ 6,200    
Share Repurchase Program 2019 and 2021            
Share Repurchases [Line Items]            
Shares of common stock repurchased     20,000,000     41,000,000
Value of common stock repurchased     $ 6,233     $ 12,433