v3.19.1

Acquisitions and Divestitures (Additional Information) (Details) $ in Millions	9 Months Ended
	Apr. 27, 2019 USD ($) acquisition	Apr. 28, 2018 USD ($)	Oct. 28, 2018 USD ($)
Supplementary Information [Line Items]
Number of business combinations (acquisition) | acquisition	5
Acquired cash and cash equivalents	$ 100
Discontinued operations, held-for-sale | Service Provider Video
Supplementary Information [Line Items]
Disposal group, tangible assets			$ 160
Disposal group, goodwill and intangible assets			340
Disposal group, liabilities			$ 200
General and administrative
Supplementary Information [Line Items]
Acquisition related costs	$ 15	$ 25

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Disposal Group, Including Discontinued Operation, Goodwill And Intangible Assets

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).

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Amount classified as liabilities attributable to disposal group held for sale or disposed of.

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The number of businesses acquired by the entity during the period.

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