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Segment Information - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 26, 2020 USD ($)	Jun. 27, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 26, 2020 USD ($) Segment	Sep. 28, 2019 USD ($)	Dec. 28, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment				3
Number of operating segments \| Segment				3
Goodwill impairment charges				$ 352
Goodwill	$ 605			605		$ 944
Contract Reporting Unit
Segment Reporting Information [Line Items]
Goodwill, Fair value		$ 115
Goodwill	241			241
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	5		$ 3	12	$ 9
Operating Segments \| CompuCom Division
Segment Reporting Information [Line Items]
Goodwill, Fair value		237
Goodwill impairment charges		237		237
Goodwill	211			211		456
Operating Segments \| CompuCom Division \| Trade Name
Segment Reporting Information [Line Items]
Indefinite-lived intangible asset, impairment charge	0	11
Operating Segments \| Business Solutions Division
Segment Reporting Information [Line Items]
Goodwill impairment charges		$ 115		115
Goodwill	$ 316			$ 316		$ 410