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Amount, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income.

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Taxes - Income Taxes Paid (Details) - USD ($) $ in Millions	12 Months Ended
Taxes - Income Taxes Paid (Details) - USD ($) $ in Millions	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Effective Income Tax Rate Reconciliation [Line Items]
Cash taxes paid in total	$ 5,364	$ 5,884	$ 5,879
U.S. federal	1,743
U.S. state and local	895
Non-U.S.	2,726
Mexico
Effective Income Tax Rate Reconciliation [Line Items]
Non-U.S.	1,285
China
Effective Income Tax Rate Reconciliation [Line Items]
Non-U.S.	$ 382