Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 30, 2025	Apr. 30, 2024
Restructuring and Related Activities [Abstract]
Restructuring charges	[1],[2]	$ 36	$ 8

[1] Amounts include amortization of intangible assets acquired through business combinations, as follows: Three Months Ended April 30,20252024Cost of revenues$162 $238 Sales and marketing233 223 

[2] Amounts include stock-based compensation expense, as follows:  Three Months Ended April 30, 20252024Cost of revenues$151 $119 Research and development275 260 Sales and marketing285 290 General and administrative88 81 Restructuring 15 0