Commitments and Contingencies - Schedule of Purchase Commitments (Details) - USD ($) $ in Millions	Jul. 27, 2019	Jul. 28, 2018
Purchase Obligation, Fiscal Year Maturity [Abstract]
Less than 1 year	$ 4,239	$ 5,407
1 to 3 years	728	710
3 to 5 years	0	360
Total	$ 4,967	$ 6,477

Minimum amount of purchase arrangement maturing in the fourth and fifth fiscal years following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInFourthAndFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant