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						9 Months Ended
	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Oct. 31, 2024	Oct. 31, 2023
Numerator:
Net income	$ 275	$ 282	$ 252	$ 241	$ 222	$ 161	$ 809	$ 624
Denominator:
Denominator for basic net income per share—weighted average shares (in shares)	215			214			215	214
Effect of dilutive securities (in shares)	2			2			2	2
Denominator for dilutive net income per share (in shares)	217			216			217	216
Basic net income per share (in usd per share)	$ 1.28			$ 1.13			$ 3.76	$ 2.92
Diluted net income per share (in usd per share)	$ 1.27			$ 1.12			$ 3.73	$ 2.89