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Geographic Information - Summary of Revenues by Geographic Area (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025 USD ($) market	Jul. 31, 2024 USD ($)	Jul. 31, 2025 USD ($) market	Jul. 31, 2024 USD ($)
Disaggregation of Revenue [Line Items]
Number of primary geographical markets | market	2		2
Total revenues	$ 2,348	$ 2,085	$ 4,588	$ 4,075
United States
Disaggregation of Revenue [Line Items]
Total revenues	1,764	1,561	3,445	3,054
Other countries
Disaggregation of Revenue [Line Items]
Total revenues	$ 584	$ 524	$ 1,143	$ 1,021

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