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Revenue Recognition - Additional Information (Detail)
3 Months Ended 12 Months Ended
Dec. 25, 2021
USD ($)
Sep. 25, 2021
USD ($)
Jun. 26, 2021
USD ($)
Mar. 27, 2021
USD ($)
Dec. 26, 2020
USD ($)
Sep. 26, 2020
USD ($)
Jun. 27, 2020
USD ($)
Mar. 28, 2020
USD ($)
Dec. 25, 2021
USD ($)
Segment
Dec. 26, 2020
USD ($)
Dec. 28, 2019
USD ($)
Revenue From Contract With Customer [Line Items]                      
Number of reportable segments | Segment                 2    
Short-term contract liabilities $ 52,000,000       $ 50,000,000       $ 52,000,000 $ 50,000,000  
Recognition of contract assets as a result of business combination                 0 0  
Revenue recognition included in short-term contract liabilities                 24,000,000 20,000,000  
Recognition of contract liabilities as a result of business combination                 0 0  
Significant adjustment to revenue from performance obligations                 0 0  
Contract with customer, asset, reclassified to receivable                 0 0  
Short-term contract assets 16,000,000       15,000,000       16,000,000 15,000,000  
Long-term contract assets 8,000,000       15,000,000       8,000,000 15,000,000  
Long-term contract liabilities 2,000,000       4,000,000       2,000,000 4,000,000  
Capitalized contract cost, amortization                 24,000,000 29,000,000 $ 34,000,000
Impairment charges related to contract assets 2,000,000 $ 5,000,000 $ 1,000,000 $ 12,000,000 8,000,000 $ 10,000,000 $ 153,000,000 $ 12,000,000 20,000,000 182,000,000 $ 56,000,000
Contract Assets                      
Revenue From Contract With Customer [Line Items]                      
Impairment charges related to contract assets                 0 0  
CompuCom Division                      
Revenue From Contract With Customer [Line Items]                      
Short-term contract liabilities 10,000,000       9,000,000       10,000,000 9,000,000  
Short-term contract assets 1,000,000       1,000,000       1,000,000 1,000,000  
Long-term contract assets 2,000,000       2,000,000       2,000,000 2,000,000  
Long-term contract liabilities 2,000,000       4,000,000       2,000,000 4,000,000  
Accrued Expenses and Other Current Liabilities                      
Revenue From Contract With Customer [Line Items]                      
Short-term contract liabilities $ 12,000,000       $ 12,000,000       $ 12,000,000 $ 12,000,000  
Sales Revenue, Net | Product Concentration Risk | Maximum                      
Revenue From Contract With Customer [Line Items]                      
Service revenue, percent                 10.00%