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Other Assets - Summary of Future Estimated Amortization Expense Related to Acquired Land Leasehold Interest and Technology Patents (Details) - USD ($) $ in Millions	Jul. 31, 2025	Jan. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Remainder of 2026	$ 41
2027	57
2028	53
2029	43
2030	35
Thereafter	91
Patented Technology and Other Intangible Assets, Net
Finite-Lived Intangible Assets [Line Items]
Remainder of 2026	2
2027	3
2028	3
2029	3
2030	2
Thereafter	10
Net Book Value	$ 23	$ 25

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