v3.25.3
Fair Value Measurements (Carrying Value and Fair Value of Long-Term Debt, Including Current Portion) (Details) - USD ($)
$ in Millions
Oct. 31, 2025
Jan. 31, 2025
Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, including amounts due within one year $ 37,968 $ 35,999
Fair Value, Inputs, Level 2 | Fair Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt, including amounts due within one year $ 36,813 $ 33,790