Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 1,541	$ 1,533
Other comprehensive income (loss), net of reclassification adjustments:
Foreign currency translation and other losses	110	(23)
Unrealized gains (losses) on marketable securities	31	(30)
Other comprehensive income (loss), before tax	141	(53)
Tax effect	(5)	8
Other comprehensive income (loss), net	136	(45)
Comprehensive income	$ 1,677	$ 1,488