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Fair Value Measurements (Carrying Value and Fair Value of Long-Term Debt, Including Current Portion) (Details) - USD ($) $ in Millions	Jul. 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	$ 39,651	$ 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	$ 37,748	$ 33,790

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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