Intangible Assets Acquired Through Business Combinations and Goodwill - Summary of Intangible Assets Acquired From Business Combinations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			$ 10,183
Additions and retirements, net			16
Intangible assets, gross, ending balance	$ 10,199		10,199
Accumulated amortization, beginning balance			(5,755)
Expense and retirements, net			(775)
Accumulated amortization, ending balance	(6,530)		(6,530)
Intangible assets, net, beginning balance			4,428
Intangible assets, net, ending balance	3,669		$ 3,669
Weighted Average Remaining Useful Life (Years)			2 years 6 months
Amortization of intangible assets	380	$ 454	$ 775	$ 915
Acquired developed technology
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, gross, beginning balance			2,958
Additions and retirements, net			16
Intangible assets, gross, ending balance	2,974		2,974
Accumulated amortization, beginning balance			(1,753)
Expense and retirements, net			(312)
Accumulated amortization, ending balance	(2,065)		(2,065)
Intangible assets, net, beginning balance			1,205
Intangible assets, net, ending balance	909		$ 909
Weighted Average Remaining Useful Life (Years)			6 months
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			(429)
Accumulated amortization, ending balance	(4,249)		(4,249)
Intangible assets, net, beginning balance			3,074
Intangible assets, net, ending balance	2,645		$ 2,645
Weighted Average Remaining Useful Life (Years)			3 years 2 months 12 days
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			(34)
Accumulated amortization, ending balance	(216)		(216)
Intangible assets, net, beginning balance			149
Intangible assets, net, ending balance	$ 115		$ 115
Weighted Average Remaining Useful Life (Years)			1 year 8 months 12 days