Significant Accounting Policies - Revenue Recognition (Details) - customer	12 Months Ended
Nov. 24, 2019	Nov. 25, 2018	Nov. 26, 2017
Revenue, Major Customer [Line Items]
Number of largest customers	10
Sales Revenue, Services, Net \| Customer Concentration Risk [Member]
Revenue, Major Customer [Line Items]
Concentration risk, percentage	26.00%	27.00%	28.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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