Short-term Borrowings and Long-term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025
Debt Instrument [Line Items]
Unsecured debt	$ 38,802	$ 36,846
Total debt	38,166	35,999
Less amounts due within one year	(3,542)	(2,598)
Long-term debt	34,624	33,401
Total other debt
Debt Instrument [Line Items]
Total other	(636)	(847)
Denominated U S Dollar
Debt Instrument [Line Items]
Unsecured debt	32,782	31,406
Denominated US Dollar with Fixed Rate
Debt Instrument [Line Items]
Unsecured debt	$ 32,032	$ 31,406
Denominated US Dollar with Fixed Rate \| Unsecured debt
Debt Instrument [Line Items]
Average Rate	3.90%	3.80%
Denominated US Dollar with Variable Rate
Debt Instrument [Line Items]
Unsecured debt	$ 750	$ 0
Denominated US Dollar with Variable Rate \| Unsecured debt
Debt Instrument [Line Items]
Average Rate	4.10%	0.00%
Denominated Euro with Fixed Rate
Debt Instrument [Line Items]
Unsecured debt	$ 1,955	$ 1,715
Denominated Euro with Fixed Rate \| Unsecured debt
Debt Instrument [Line Items]
Average Rate	4.00%	4.00%
Denominated Sterling with Fixed Rate
Debt Instrument [Line Items]
Unsecured debt	$ 3,677	$ 3,336
Denominated Sterling with Fixed Rate \| Unsecured debt
Debt Instrument [Line Items]
Average Rate	5.40%	5.40%
Denominated Yen with Fixed Rate
Debt Instrument [Line Items]
Unsecured debt	$ 388	$ 389
Denominated Yen with Fixed Rate \| Unsecured debt
Debt Instrument [Line Items]
Average Rate	0.50%	0.50%

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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