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Financial Instruments - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Long-term    
Derivative Liability Statement Of Financial Position Extensible Enumeration Not Disclosed Flag Derivative contract liabilities (7)  
Derivative contract liabilities $ (28) $ (22)
Total 2,280 1,442
Derivative contract assets    
Long-term    
Derivative contract assets, fair value 26 28
Commercial paper    
Short-term    
Fair Value 155 96
Corporate debt securities    
Short-term    
Fair Value 66 79
Long-term    
Fair Value 157 97
U.S. government securities    
Short-term    
Fair Value 67 74
Long-term    
Fair Value 83 51
Asset backed securities    
Short-term    
Fair Value 25 19
Long-term    
Fair Value 85 71
Certificates of deposit    
Short-term    
Fair Value 16  
Other    
Short-term    
Fair Value 19 19
Long-term    
Fair Value 28 8
Agency bonds    
Long-term    
Fair Value 23 40
Mutual funds    
Long-term    
Long-term other assets, fair value 137 118
Level 1    
Long-term    
Derivative contract liabilities 0 0
Total 1,244 736
Level 1 | Derivative contract assets    
Long-term    
Derivative contract assets, fair value 0 0
Level 1 | Commercial paper    
Short-term    
Fair Value 0 0
Level 1 | Corporate debt securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 1 | U.S. government securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 1 | Asset backed securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 1 | Certificates of deposit    
Short-term    
Fair Value 0  
Level 1 | Other    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 1 | Agency bonds    
Long-term    
Fair Value 0 0
Level 1 | Mutual funds    
Long-term    
Long-term other assets, fair value 137 118
Level 2    
Long-term    
Derivative contract liabilities (28) (22)
Total 1,036 706
Level 2 | Derivative contract assets    
Long-term    
Derivative contract assets, fair value 26 28
Level 2 | Commercial paper    
Short-term    
Fair Value 155 96
Level 2 | Corporate debt securities    
Short-term    
Fair Value 66 79
Long-term    
Fair Value 157 97
Level 2 | U.S. government securities    
Short-term    
Fair Value 67 74
Long-term    
Fair Value 83 51
Level 2 | Asset backed securities    
Short-term    
Fair Value 25 19
Long-term    
Fair Value 85 71
Level 2 | Certificates of deposit    
Short-term    
Fair Value 16  
Level 2 | Other    
Short-term    
Fair Value 19 19
Long-term    
Fair Value 28 8
Level 2 | Agency bonds    
Long-term    
Fair Value 23 40
Level 2 | Mutual funds    
Long-term    
Long-term other assets, fair value 0 0
Level 3    
Long-term    
Derivative contract liabilities 0 0
Total 0 0
Level 3 | Derivative contract assets    
Long-term    
Derivative contract assets, fair value 0 0
Level 3 | Commercial paper    
Short-term    
Fair Value 0 0
Level 3 | Corporate debt securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 3 | U.S. government securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 3 | Asset backed securities    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 3 | Certificates of deposit    
Short-term    
Fair Value 0  
Level 3 | Other    
Short-term    
Fair Value 0 0
Long-term    
Fair Value 0 0
Level 3 | Agency bonds    
Long-term    
Fair Value 0 0
Level 3 | Mutual funds    
Long-term    
Long-term other assets, fair value 0 0
Money market funds    
Cash equivalents    
Fair Value 1,107 618
Money market funds | Level 1    
Cash equivalents    
Fair Value 1,107 618
Money market funds | Level 2    
Cash equivalents    
Fair Value 0 0
Money market funds | Level 3    
Cash equivalents    
Fair Value 0 0
Commercial paper    
Cash equivalents    
Fair Value 163 85
Commercial paper | Level 1    
Cash equivalents    
Fair Value 0 0
Commercial paper | Level 2    
Cash equivalents    
Fair Value 163 85
Commercial paper | Level 3    
Cash equivalents    
Fair Value 0 0
Certificates of deposit    
Cash equivalents    
Fair Value 54 38
Certificates of deposit | Level 1    
Cash equivalents    
Fair Value 0 0
Certificates of deposit | Level 2    
Cash equivalents    
Fair Value 54 38
Certificates of deposit | Level 3    
Cash equivalents    
Fair Value 0 0
U.S. government securities    
Cash equivalents    
Fair Value 96 19
U.S. government securities | Level 1    
Cash equivalents    
Fair Value 0 0
U.S. government securities | Level 2    
Cash equivalents    
Fair Value 96 19
U.S. government securities | Level 3    
Cash equivalents    
Fair Value 0 0
Other    
Cash equivalents    
Fair Value 1 4
Other | Level 1    
Cash equivalents    
Fair Value 0 0
Other | Level 2    
Cash equivalents    
Fair Value 1 4
Other | Level 3    
Cash equivalents    
Fair Value $ 0 $ 0