Reporting unit percentage of carrying value exceeding fair value.

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Date when the acquirer obtains control of the acquiree, in YYYY-MM-DD format.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Fair value portion of asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Segment Information - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 25, 2021 USD ($)	Jun. 26, 2021 USD ($)	Sep. 26, 2020 USD ($)	Sep. 25, 2021 USD ($) Segment	Sep. 26, 2020 USD ($)	Dec. 26, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments \| Segment				2
Number of operating segments \| Segment				2
Goodwill	$ 462			$ 462		$ 394
Noncurrent Assets Held for Sale
Segment Reporting Information [Line Items]
Goodwill	113			$ 113
CompuCom Division and Contract Reporting Unit
Segment Reporting Information [Line Items]
Carrying value in excess of fair value for reporting unit, percentage						12.00%
BuyerQuest Acquisition
Segment Reporting Information [Line Items]
Date of acquisition				Jan. 29, 2021
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	5		$ 5	$ 14	$ 12
Goodwill	$ 67			$ 67
Operating Segments \| CompuCom Division
Segment Reporting Information [Line Items]
Goodwill, Fair value		$ 103
Goodwill impairment charge		103
Operating Segments \| CompuCom Division \| Trade Name
Segment Reporting Information [Line Items]
Indefinite-lived intangible asset, impairment charge		$ 11