Intangible Assets Acquired Through Business Combinations and Goodwill - Summary of Intangible Assets Acquired From Business Combinations (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance	$ 11,601
Additions and retirements, net	(1,418)
Intangible assets, gross, ending balance	10,183	$ 11,601
Accumulated amortization, beginning balance	(6,323)
Expense and retirements, net	568
Accumulated amortization, ending balance	(5,755)	(6,323)
Intangible assets, net, beginning balance	5,278
Intangible assets, net, ending balance	$ 4,428	5,278
Weighted Average Remaining Useful Life (Years)	2 years 9 months 18 days
Amortization of intangible assets	$ 1,600	1,900	$ 2,000
Developed technology
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance	4,624
Additions and retirements, net	(1,666)
Intangible assets, gross, ending balance	2,958	4,624
Accumulated amortization, beginning balance	(3,208)
Expense and retirements, net	1,455
Accumulated amortization, ending balance	(1,753)	(3,208)
Intangible assets, net, beginning balance	1,416
Intangible assets, net, ending balance	$ 1,205	1,416
Weighted Average Remaining Useful Life (Years)	10 months 24 days
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance	$ 6,674
Additions and retirements, net	220
Intangible assets, gross, ending balance	6,894	6,674
Accumulated amortization, beginning balance	(2,985)
Expense and retirements, net	(835)
Accumulated amortization, ending balance	(3,820)	(2,985)
Intangible assets, net, beginning balance	3,689
Intangible assets, net, ending balance	$ 3,074	3,689
Weighted Average Remaining Useful Life (Years)	3 years 7 months 6 days
Other
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance	$ 303
Additions and retirements, net	28
Intangible assets, gross, ending balance	331	303
Accumulated amortization, beginning balance	(130)
Expense and retirements, net	(52)
Accumulated amortization, ending balance	(182)	(130)
Intangible assets, net, beginning balance	173
Intangible assets, net, ending balance	$ 149	$ 173
Weighted Average Remaining Useful Life (Years)	2 years 4 months 24 days