CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 186	$ 115	$ 332	$ 271
Other comprehensive (loss) income, net of reclassifications:
Net gain on derivative instruments (net of tax effect of $(4), $(2), $(12), and $(4), respectively)	18	10	73	20
Change in net unrealized gain on available-for-sale debt securities (net of tax effect of zero for all periods presented)	4	4	3	8
Change in defined benefit pension items (net of tax effect of zero for all periods presented)	3	0	0	0
Net change in cumulative foreign currency translation loss (net of tax effect of $1, $1, $1, and $(1) respectively)	(46)	(25)	(121)	(15)
Total other comprehensive (loss) income	(21)	(11)	(45)	13
Total comprehensive income	$ 165	$ 104	$ 287	$ 284