Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Segment Information and Major Customers (Additional Information) (Details) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 28, 2018 USD ($)	Apr. 28, 2018 USD ($)	Jan. 27, 2018 USD ($)	Oct. 28, 2017 USD ($)	Jul. 29, 2017 USD ($)	Apr. 29, 2017 USD ($)	Jan. 28, 2017 USD ($)	Oct. 29, 2016 USD ($)	Jul. 28, 2018 USD ($) segment	Jul. 29, 2017 USD ($)	Jul. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of geographic segments (segment) \| segment									3
Revenue	$ 12,844	$ 12,463	$ 11,887	$ 12,136	$ 12,133	$ 11,940	$ 11,580	$ 12,352	$ 49,330	$ 48,005	$ 49,247
SP Video CPE Business
Segment Reporting Information [Line Items]
Revenue											504
United States
Segment Reporting Information [Line Items]
Revenue									$ 25,500	$ 25,000	$ 25,900