v3.25.4
Short-term Borrowings and Long-term Debt - Significant Long-term Debt Issued (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Jan. 31, 2024
Debt Instrument [Line Items]      
Proceeds from issuance of long-term debt $ 3,983 $ 0 $ 4,967
Senior Unsecured Notes      
Debt Instrument [Line Items]      
Proceeds from issuance of long-term debt 3,983    
Floating Debt, Due 2027 | Senior Unsecured Notes      
Debt Instrument [Line Items]      
Principal Amount 750    
Proceeds from issuance of long-term debt 749    
4.100% Debt, Due 2027 | Senior Unsecured Notes      
Debt Instrument [Line Items]      
Principal Amount $ 750    
Interest Rate 4.10%    
Proceeds from issuance of long-term debt $ 748    
4.350% Debt, Due 2030 | Senior Unsecured Notes      
Debt Instrument [Line Items]      
Principal Amount $ 1,000    
Interest Rate 4.35%    
Proceeds from issuance of long-term debt $ 993    
4.900% Debt, Due 2035 | Senior Unsecured Notes      
Debt Instrument [Line Items]      
Principal Amount $ 1,500    
Interest Rate 4.90%    
Proceeds from issuance of long-term debt $ 1,493