Decrease in gross margin scenario.

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Discounted Cash Flow Analysis, Percentage Used

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Increase (decrease) in percentage of sensitivity analysis.

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Amount of expenses incurred but not yet paid nor invoiced, and liabilities classified as other.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Percentage of fair value of reporting unit in excess of carrying amount.

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Derivative Instruments and Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Jul. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Jul. 01, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairments	$ 7,000,000	$ 3,000,000	$ 1,000,000	$ 7,000,000	$ 4,000,000	$ 15,000,000
Impairment of other indefinite-lived intangible assets				$ 1,000,000
Long-term Growth Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in percentage of sensitivity analysis	(1.00%)			(1.00%)
Impairment				$ 20,000,000
Weighted-average Cost of Capital
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Increase (decrease) in percentage of sensitivity analysis	1.00%			1.00%
Impairment				$ 60,000,000
Contract Reporting
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Reporting units of carrying amout, percentage							13.00%
CompuCom Systems, Inc
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Reporting units of carrying amout, percentage	4.00%			4.00%			17.00%
Retail Stores
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairments				$ 6,000,000	2,000,000	8,000,000
Retail Stores \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage used for analysis				7.00%
Retail Stores \| Level 3 \| Favorable Lease Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairments					2,000,000	$ 7,000,000
Retail Stores \| Level 3 \| A 100 basis point decrease in anticipated sales
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Decrease in sales for scenario				1.00%
Decrease in gross margin for scenario				0.50%
Retail Stores \| Level 3 \| 50 basis point decrease in anticipated gross margins
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Decrease in sales for scenario				1.00%
Maximum \| Retail Stores \| Level 3 \| A 100 basis point decrease in anticipated sales \| Additional impairment charges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairments	$ 1,000,000
Maximum \| Retail Stores \| Level 3 \| 50 basis point decrease in anticipated gross margins \| Additional impairment charges
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset impairments	1,000,000
Derivative Foreign Currency and Fuel Contract \| Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accrued expenses and other liabilities	$ 1,000,000	$ 1,000,000		$ 1,000,000	$ 1,000,000