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Common Stock and Stock-Based Compensation - Restricted Stock and Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
May 31, 2022
May 31, 2021
May 31, 2020
Performance-based Restricted Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options vesting period (in years) 3 years    
Original target award percentage that may be issued at the end of the performance period 100.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Vested (in shares) 0    
Granted (in shares) 500,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Granted, Weighted Average Grant Date Fair Value (in dollars per share) $ 239,380,000    
Expected volatility 27.10%    
Risk-free interest rate 0.50%    
Performance-based Restricted Stock Units (PSUs) | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of the original target award that may be issued at the end of the performance period 0.00%    
Performance-based Restricted Stock Units (PSUs) | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of the original target award that may be issued at the end of the performance period 200.00%    
Restricted Stock And Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Nonvested Awards, beginning balance (in shares) 6,600,000    
Vested (in shares) (2,300,000)    
Forfeited (in shares) (700,000)    
Granted (in shares) 3,100,000    
Nonvested Awards, ending balance (in shares) 6,700,000 6,600,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Nonvested Awards, Weighted Average Grant Date Fair Value, beginning balance (in dollars per share) $ 99,700,000    
Vested, Weighted Average Grant Date Fair Value (in dollars per share) 93,700,000    
Forfeited, Weighted Average Grant Date Fair Value (in dollars per share) 123,540,000    
Granted, Weighted Average Grant Date Fair Value (in dollars per share) 168,040,000.00    
Nonvested Awards, Weighted Average Grant Date Fair Value, ending balance (in dollars per share) $ 130.88 $ 99,700,000  
Unrecognized compensation costs from restricted stock, net of estimated forfeitures $ 587    
Unrecognized compensation costs from stock options, net of estimated forfeitures, to be recognized as operating overhead expense over a weighted average period (in years) 2 years 4 months 24 days    
Restricted Stock And Time-Vesting Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Granted, Weighted Average Grant Date Fair Value (in dollars per share) $ 153.63 $ 113.84 $ 88.26
Vested, fair value $ 354 $ 310 $ 98