Geographic Information - Schedule of Revenues by Geographic Area (Details) $ in Millions	3 Months Ended	6 Months Ended
Jul. 31, 2026 USD ($) market	Jul. 31, 2025 USD ($)	Jul. 31, 2026 USD ($) market	Jul. 31, 2025 USD ($)
Disaggregation of Revenue [Line Items]
Number of primary geographical markets \| market	2		2
Total revenues	$ 2,649	$ 2,348	$ 5,191	$ 4,588
U.S.
Disaggregation of Revenue [Line Items]
Total revenues	1,967	1,764	3,861	3,445
Other countries
Disaggregation of Revenue [Line Items]
Total revenues	$ 682	$ 584	$ 1,330	$ 1,143

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

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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