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Income Taxes - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 31, 2021
May 31, 2020
May 31, 2019
May 31, 2018
Income Tax Contingency [Line Items]        
Total gross unrecognized tax benefits, excluding related interest and penalties $ 896 $ 771 $ 808 $ 698
Total gross unrecognized tax benefits, excluding related interest and penalties, amount which would affect the Company's effective tax rate if recognized in future periods 609      
Increase (decrease) in liability for payment of interest and penalties 45 (16) 17  
Accrued interest and penalties related to uncertain tax positions (excluding federal benefit) 203 158    
Estimated decrease in total gross unrecognized tax benefits as a result of resolutions of global tax examinations and expiration of applicable statutes of limitations $ 40      
Tax holiday, expiration period 2031      
Decrease in income tax expense related to tax holiday $ 238 $ 238 $ 167  
Decrease in income tax expense related to tax holiday per diluted share, (in dollars per share) $ 0.15 $ 0.15 $ 0.10  
Valuation allowance decrease related to tax benefits of certain subsidiaries with operating losses $ 14 $ 62 $ 7  
Available domestic and foreign loss carry-forwards 65      
Deferred income taxes and other liabilities        
Income Tax Contingency [Line Items]        
Long-term income taxes payable 640 $ 757    
NETHERLANDS        
Income Tax Contingency [Line Items]        
Undistributed earnings of foreign subsidiaries 10,300      
Withholding taxes that would be payable upon remittance of undistributed earnings $ 1,500