Intangible Assets Acquired Through Business Combinations and Goodwill - Summary of Intangible Assets Acquired From Business Combinations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			$ 10,183
Additions and retirements, net			224
Intangible assets, gross, ending balance	$ 10,407		10,407
Accumulated amortization, beginning balance			(5,755)
Expense and retirements, net			(1,161)
Accumulated amortization, ending balance	(6,916)		(6,916)
Intangible assets, net, beginning balance			4,428
Intangible assets, net, ending balance	3,491		$ 3,491
Weighted Average Remaining Useful Life (Years)			2 years 4 months 24 days
Amortization of intangible assets	386	$ 354	$ 1,200	$ 1,300
Acquired developed technology
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			2,958
Additions and retirements, net			224
Intangible assets, gross, ending balance	3,182		3,182
Accumulated amortization, beginning balance			(1,753)
Expense and retirements, net			(467)
Accumulated amortization, ending balance	(2,220)		(2,220)
Intangible assets, net, beginning balance			1,205
Intangible assets, net, ending balance	962		$ 962
Weighted Average Remaining Useful Life (Years)			1 year
Customer relationships
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			$ 6,894
Additions and retirements, net			0
Intangible assets, gross, ending balance	6,894		6,894
Accumulated amortization, beginning balance			(3,820)
Expense and retirements, net			(643)
Accumulated amortization, ending balance	(4,463)		(4,463)
Intangible assets, net, beginning balance			3,074
Intangible assets, net, ending balance	2,431		$ 2,431
Weighted Average Remaining Useful Life (Years)			3 years
Other
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			$ 331
Additions and retirements, net			0
Intangible assets, gross, ending balance	331		331
Accumulated amortization, beginning balance			(182)
Expense and retirements, net			(51)
Accumulated amortization, ending balance	(233)		(233)
Intangible assets, net, beginning balance			149
Intangible assets, net, ending balance	$ 98		$ 98
Weighted Average Remaining Useful Life (Years)			1 year 6 months