Summary of Significant Accounting Policies - Fiscal Year (Details)	12 Months Ended
Oct. 29, 2017	Oct. 30, 2016	Oct. 25, 2015
Summary of Significant Accounting Policies
Fiscal year term	364 days	371 days	364 days

Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

Name:	us-gaap_FiscalPeriodDuration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration