Acquisitions - Additional Information (Detail) $ in Millions			1 Months Ended			3 Months Ended			12 Months Ended
		Nov. 08, 2017 USD ($)	Jan. 31, 2019 Business	Dec. 29, 2018 USD ($)	Apr. 30, 2018 USD ($)	Dec. 29, 2018 USD ($) Business	Sep. 29, 2018 Business	Mar. 31, 2018 Business	Dec. 29, 2018 USD ($) Business	Dec. 30, 2017 USD ($) Business	Dec. 31, 2016 USD ($)
Business Acquisition, Acquisition Related Costs [Line Items]
Number of business acquired | Business									7
Goodwill				$ 914		$ 914			$ 914	$ 851
Decrease in receivables									43	$ 15	$ 55
Clearpath Holdings, LLC
Business Acquisition, Acquisition Related Costs [Line Items]
Tax Benefit				4		4
Cleaning and Breakroom Supplies
Business Acquisition, Acquisition Related Costs [Line Items]
Number of business acquired | Business										1
Multiple Acquisition
Business Acquisition, Acquisition Related Costs [Line Items]
Contingent consideration estimated				15		15			15
Incremental business combination contingent consideration liability									13
Contingent consideration estimated to be paid in 2019				28		28			28
Business combination consideration transferred									114
Goodwill				70		70			70
Multiple Acquisition | Customer Relationships
Business Acquisition, Acquisition Related Costs [Line Items]
Intangible assets acquired				12		12			12
CompuCom Systems, Inc
Business Acquisition, Acquisition Related Costs [Line Items]
Business combination consideration transferred		$ 937
Intangible assets acquired	[1]	386		386		386			386
Goodwill		442		449		449			449
Payment to acquire business					$ 18
Tax Benefit									4
Decrease in receivables						5
Increases in other assets						4
Increases in accounts payable						5
CompuCom Systems, Inc | Customer Relationships
Business Acquisition, Acquisition Related Costs [Line Items]
Intangible assets acquired		$ 297		$ 297		$ 297			$ 297
United States
Business Acquisition, Acquisition Related Costs [Line Items]
Number of business acquired | Business						2	3	1	6	3
United States | Subsequent Event
Business Acquisition, Acquisition Related Costs [Line Items]
Number of business acquired | Business			2

[1] Intangible assets acquired consist of customer relationships of $297 million, developed technology of $19 million, and trade names of $70 million.