CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net gain (loss) on derivative instruments, tax effect	$ (7,000,000)	$ (8,000,000)	$ 5,000,000
Change in net unrealized gain on available-for-sale securities, tax (benefit)	0	0	0
Change in defined pension items, tax	1,000,000	(1,000,000)	0
Net change in cumulative foreign currency translation (loss) gain, tax expense (benefit)	$ 0	$ 0	$ (1,000,000)