Stockholders' Equity - Summary of Repurchases Under Share Repurchase Program (Details) - Share Repurchase Program - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Oct. 31, 2025	Jul. 31, 2025	Apr. 30, 2025	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares (in shares)	15	8	10	5	18	7
Average price per share (in dollars per share)	$ 246.33	$ 269.96	$ 273.42	$ 257.00	$ 246.14	$ 293.00
Amount	$ 3,814	$ 2,199	$ 2,681	$ 1,228	$ 4,288	$ 2,168