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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Summary of Significant Accounting Policies - Summary of IT Solutions and IT and Other Staffing Revenue as Percentage of Total Revenue (Details)	3 Months Ended		6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019	Jun. 26, 2020	Jun. 28, 2019
Product Information [Line Items]
Revenue, percent	100.00%		100.00%
Product Concentration Risk [Member] \| Sales Revenue, Services, Net [Member]
Product Information [Line Items]
Revenue, percent	100.00%	100.00%	100.00%	100.00%
Product Concentration Risk [Member] \| Sales Revenue, Services, Net [Member] \| IT Solutions [Member]
Product Information [Line Items]
Revenue, percent	38.00%	35.50%	35.60%	34.90%
Product Concentration Risk [Member] \| Sales Revenue, Services, Net [Member] \| IT and Other Staffing [Member]
Product Information [Line Items]
Revenue, percent	62.00%	64.50%	64.40%	65.10%