Net Income Per Share - Schedule of Computation of Net Income Per Share Amounts (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Numerator:
Net income	$ 252	$ 161
Denominator:
Denominator for basic net income per share—weighted average shares (in shares)	215	215
Effect of dilutive securities (in shares)	2	1
Denominator for dilutive net income per share (in shares)	217	216
Basic net income per share (in usd per share)	$ 1.17	$ 0.75
Diluted net income per share (in usd per share)	$ 1.16	$ 0.75