Goodwill and Purchased Intangible Assets - Schedule of Amortization of Purchased Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 26, 2025	Jul. 27, 2024	Jul. 29, 2023
Intangible Asset, Acquired, Finite-Lived [Line Items]
Amortization of purchased intangible assets	$ 1,028	$ 698	$ 282
Cost of sales
Intangible Asset, Acquired, Finite-Lived [Line Items]
Amortization of purchased intangible assets	1,174	955	649
Operating expenses
Intangible Asset, Acquired, Finite-Lived [Line Items]
Amortization of purchased intangible assets	1,028	698	282
Total
Intangible Asset, Acquired, Finite-Lived [Line Items]
Amortization of purchased intangible assets	$ 2,202	$ 1,653	$ 931