CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
Statement of Comprehensive Income [Abstract]
Net income	$ 491	$ 152
Other comprehensive income (loss), net of reclassifications:
Net gain (loss) on derivative instruments (net of tax effect of $(1) and $2, respectively)	10	(23)
Change in net unrealized gain on available-for-sale debt securities (net of tax effect of $(6) and zero, respectively)	1	1
Change in defined benefit pension items (net of tax effect of zero for all periods presented)	0	1
Net change in cumulative foreign currency translation (loss) gain (net of tax effect of $(1) and $(3), respectively)	(13)	58
Total other comprehensive income (loss)	(2)	37
Total comprehensive income (loss)	$ 489	$ 189