Stockholders' Equity - Summary of Repurchases Under Share Repurchase Program (Details) - Share Repurchase Program - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares (in shares)	30	36	28
Average price per share (in dollars per share)	$ 260.12	$ 210.30	$ 144.94
Amount	$ 7,757	$ 7,674	$ 4,000