CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 313	$ 282	$ 465	$ 534
Other comprehensive income (loss), net of reclassifications:
Net loss on derivative instruments (net of tax effect of $1, $1, $3, and $1, respectively)	(6)	(5)	(29)	(3)
Change in net unrealized loss on available-for-sale debt securities (net of tax effect of zero for all periods presented)	0	3	1	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 $(2), zero, $(5), and zero, respectively)	0	16	58	(13)
Total other comprehensive income (loss)	(6)	14	31	(15)
Total comprehensive income	$ 307	$ 296	$ 496	$ 519