Income Taxes - Summary of Income Taxes Paid (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Income Tax Paid, by Individual Jurisdiction [Line Items]
Federal	$ 658	$ 1,091	$ 417
State	132	276	233
Income taxes, net of tax refunds	1,282	2,061	1,027
Ireland
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	92	139	0
Israel
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	0	287	129
Other
Income Tax Paid, by Individual Jurisdiction [Line Items]
Foreign	$ 400	$ 268	$ 248

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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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Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax.

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