v3.25.4
Stockholders' Equity - Narrative (Detail)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Apr. 21, 2025
shares
Jan. 31, 2026
USD ($)
vote
$ / shares
shares
Jan. 31, 2025
USD ($)
$ / shares
shares
Jan. 31, 2024
USD ($)
$ / shares
shares
Jan. 31, 2023
shares
Jun. 30, 2022
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares purchased by employees (in shares)   1,000        
Tax benefits on share-based compensation expense | $   $ 295 $ 277 $ 257    
ESPP            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of fair market value of stock at which employees are granted shares   85.00%        
Weighted average grant date fair value (in dollars per share) | $ / shares   $ 60.99 $ 57.80 $ 57.90    
Expected volatility     32.00%      
Expected term (in years)   6 months 6 months 6 months    
Weighted average grant date fair value (in dollars per share) | $ / shares   $ 198.12        
Cash proceeds | $   $ 192        
Executive Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)   3 years        
RSUs granted (in shares) 42          
Executive Performance Shares | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of shares expected to vest   0.00%        
Executive Performance Shares | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of shares expected to vest   150.00%        
Restricted Stock Units (RSUs) and Performance-Based Restricted Stock Units (PSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)   4 years        
Weighted average grant date fair value (in dollars per share) | $ / shares   $ 219.23 $ 252.18 $ 197.22    
Total grant-date fair value of units vested | $   $ 952 $ 1,100 $ 1,400    
Unrecognized compensation cost | $   $ 2,500        
Weighted-average period to be recognized (in months and years)   3 years        
RSUs granted (in shares)   8,435        
2022 Equity Incentive Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Reserved for future issuance amount (in shares)           30,000
2012 Equity Incentive Plan (EIP)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock available for future grants (shares)   13,000        
Employee Stock Purchase Plan (ESPP)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock available for future grants (shares)   2,000        
Common stock:            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock outstanding (in shares)   259,131 266,352 263,862 257,991  
Common stock: | September 2025 Share Repurchase Program            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Authorized remaining amount to be purchased | $   $ 2,900        
Class A            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock outstanding (in shares)   212,082 215,022      
Common stock (votes per share) | vote   1        
Class B            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock outstanding (in shares)   47,049 51,330      
Common stock (votes per share) | vote   10        
Percent of shares of common stock less than 9% of the outstanding shares   9.00%        
Duration of time after death of Co-Founders until shares are converted (in months)   9 months