CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 343	$ 275	$ 808	$ 809
Other comprehensive income (loss), net of reclassifications:
Net loss on derivative instruments (net of tax effect of $2, $2, $5, and $3, respectively)	(10)	(12)	(39)	(15)
Change in net unrealized loss on available-for-sale debt securities (net of tax effect of zero for all periods presented)	2	(2)	3	(1)
Change in defined benefit pension items (net of tax effect of zero for all periods presented)	0	0	1	0
Net change in cumulative foreign currency translation gain (loss) (net of tax effect of $(4), $(1), $(9), and $(1), respectively)	(1)	3	57	(10)
Total other comprehensive income (loss)	(9)	(11)	22	(26)
Total comprehensive income	$ 334	$ 264	$ 830	$ 783