Segments - Schedule of Other Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Segment Reporting [Abstract]
Interest income	$ 83	$ 85	$ 91
Interest expense	80	71	71
Depreciation, amortization, and accretion expense	195	180	139
Amortization of costs to obtain a contract with a customer	$ 536	$ 212	$ 140