Segments - Schedule of Other Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
Segment Reporting [Abstract]
Interest income	$ 24	$ 19
Interest expense	21	18
Depreciation, amortization, and accretion expense	51	48
Amortization of costs to obtain a contract with a customer	$ 172	$ 96