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Other Changes In Plan Assets and Benefit Obligations Recognized In Other Comprehensive Loss (Income) (Detail) - North America - USD ($) $ in Millions | 12 Months Ended
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Dec. 26, 2015 | Dec. 27, 2014 | Dec. 28, 2013
Pension Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated other comprehensive loss (income) at beginning of year | $ 67 | $ (26) |
Net loss (gain) | 9 | 93 | $ (26)
Accumulated other comprehensive loss (income) at end of year | 76 | 67 | $ (26)
Other Benefits |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated other comprehensive loss (income) at beginning of year | 1 |  |
Net loss (gain) | (2) | 1 |
Accumulated other comprehensive loss (income) at end of year | $ (1) | $ 1 |

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- Definition The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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