Net Income Per Share - Reconciliation of Denominator Used in Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Numerator:
Net income	$ 6,197	$ 4,136	$ 208
Denominator:
Weighted-average shares outstanding for basic net income per share (in shares)	962	974	992
Employee stock awards (in shares)	12	10	5
Weighted-average shares outstanding for diluted net income per share (in shares)	974	984	997