Derivative Instruments - Additional Information (Details) $ in Millions	12 Months Ended
Jul. 27, 2019 USD ($)
Derivative [Line Items]
Net derivative gains to be reclassified from AOCI into earnings in next twelve months	$ 2
Derivatives designated as cash flow hedging instruments:
Derivative [Line Items]
Derivative average remaining maturity	24 months
Net investment hedging instruments
Derivative [Line Items]
Derivative average remaining maturity	6 months

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

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