CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 252	$ 161
Other comprehensive loss, net of reclassifications:
Net gain (loss) on derivative instruments (net of tax effect of zero and $2, respectively)	2	(13)
Change in net unrealized (loss) gain on available-for-sale debt securities (net of tax effect of zero for all periods presented)	(2)	2
Net change in cumulative foreign currency translation loss (net of tax effect of zero and $5 , respectively)	(29)	(4)
Total other comprehensive loss	(29)	(15)
Total comprehensive income	$ 223	$ 146