Restructuring - Summary of Restructuring Activities (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Restructuring Reserve [Roll Forward]
Charges	[1],[2]	$ 461	$ 988	$ 828
The Plan
Restructuring Reserve [Roll Forward]
Liability, beginning of the period		120	607
Charges		461	988
Payments		(198)	(1,030)
Non-cash items		(81)	(445)
Liability, end of the period		302	120	607
The Plan | Workforce Reduction
Restructuring Reserve [Roll Forward]
Liability, beginning of the period		118	607
Charges		386	541
Payments		(196)	(1,003)
Non-cash items		(6)	(27)
Liability, end of the period		302	118	607
The Plan | Office Space Reductions
Restructuring Reserve [Roll Forward]
Liability, beginning of the period		2	0
Charges		75	447
Payments		(2)	(27)
Non-cash items		(75)	(418)
Liability, end of the period		$ 0	$ 2	$ 0

[1] Amounts include amortization of intangible assets acquired through business combinations, as follows: Fiscal Year Ended January 31,202520242023Cost of revenues$750 $978 $1,035 Sales and marketing901 891 916 

[2] Amounts include stock-based compensation expense, as follows:  Fiscal Year Ended January 31, 202520242023Cost of revenues$518 $431 $499 Research and development1,091 972 1,136 Sales and marketing1,205 1,062 1,256 General and administrative367 299 368 Restructuring 2 23 20