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Valuation and Qualifying Accounts (Detail) - Valuation allowance for deferred tax assets [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Valuation Allowances And Reserves, Disclosure [Roll Forward] |  |  |
Valuation Allowances And Reserves, Beginning Balance | $ 701 | $ 595 | $ 456
Valuation Allowances And Reserves, Additions Charged to Expenses/Other Accounts | 261 | 190 | 128
Valuation Allowances And Reserves, Net (Deductions) Recoveries | (9) | (84) | 11
Valuation Allowances And Reserves, Ending Balance | $ 953 | $ 701 | $ 595

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- Definition Net (Deductions) Recoveries + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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