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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2021
Mar. 31, 2021
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Income Taxes [Line Items]            
Provision (benefit) for income taxes     $ 16,950 $ 10,978 $ 9,831  
Income taxes paid, net of refunds     23,100 16,000 13,400  
Gross unrecognized tax benefits related to uncertain tax positions     17,120 15,593 14,550 $ 13,792
Gross unrecognized tax benefits related to uncertain tax positions, if recognized would affect our effective tax rates     14,400 13,300 12,500  
Accrued interest expense related to uncertain tax positions net of federal income tax benefits     5,200 4,300 4,300  
Interest expense related to uncertain tax positions, net of income tax benefits     $ 918 $ 36 $ 274  
Regional Operating Centers            
Income Taxes [Line Items]            
Foreign earnings, taxed at rates lower than U.S. rate as a percentage of foreign income before tax     81.00% 71.00% 82.00%  
Federal            
Income Taxes [Line Items]            
Operating loss carryforwards     $ 509      
Capital loss carryforwards     $ 456      
Capital loss carryforwards expiration year     2025      
State            
Income Taxes [Line Items]            
Operating loss carryforwards     $ 1,200      
Foreign Country            
Income Taxes [Line Items]            
Operating loss carryforwards     $ 2,300      
Transfer of Intangible Properties            
Income Taxes [Line Items]            
Provision (benefit) for income taxes $ (3,300)          
Earliest Tax Year            
Income Taxes [Line Items]            
Tax years impacted   1996        
Earliest Tax Year | Federal and State            
Income Taxes [Line Items]            
Operating loss carryforwards expiration year     2024      
Latest Tax Year            
Income Taxes [Line Items]            
Tax years impacted   2016        
Latest Tax Year | Federal and State            
Income Taxes [Line Items]            
Operating loss carryforwards expiration year     2043      
India Supreme Court            
Income Taxes [Line Items]            
Provision (benefit) for income taxes   $ (620)