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Changes in Balance of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 25, 2016 | Sep. 27, 2015 | Sep. 25, 2016 | Sep. 27, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Beginning balance |  |  |  | $ (11,444) |  | $ (11,870) |
Other comprehensive loss before reclassifications |  |  |  | (46) |  | (88) |
Amounts reclassified from AOCL |  |  |  |  |  |  |
Recognition of net actuarial losses | [1] |  |  | 703 |  | 831 |
Amortization of net prior service credits | [1] |  |  | (182) |  | (194) |
Recognition of net prior service credits from divestiture of IS&GS segment |  | $ (134) |  | (134) | [2] |  |
Other | [2] |  |  | 112 |  |  |
Total reclassified from AOCL |  |  |  | 499 |  | 637 |
Other comprehensive income, net of tax |  | 113 | $ 135 | 453 |  | 549 |
Ending balance |  | (10,991) | (11,321) | (10,991) |  | (11,321) |
Postretirement Benefit Plan Adjustments |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Beginning balance |  |  |  | (11,314) |  | (11,813) |
Amounts reclassified from AOCL |  |  |  |  |  |  |
Recognition of net actuarial losses |  | 234 | 277 | 703 | [1] | 831 | [1]
Amortization of net prior service credits |  | (59) | (65) | (182) | [1] | (194) | [1]
Recognition of net prior service credits from divestiture of IS&GS segment | [2] |  |  | (134) |  |  |
Total reclassified from AOCL |  | 175 | 212 | 387 |  | 637 |
Other comprehensive income, net of tax |  |  |  | 387 |  | 637 |
Ending balance |  | (10,927) | (11,176) | (10,927) |  | (11,176) |
Other, net |  |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |  |
Beginning balance |  |  |  | (130) |  | (57) |
Other comprehensive loss before reclassifications |  |  |  | (46) |  | (88) |
Amounts reclassified from AOCL |  |  |  |  |  |  |
Other | [2] |  |  | 112 |  |  |
Total reclassified from AOCL |  |  |  | 112 |  |  |
Other comprehensive income, net of tax |  |  |  | 66 |  | (88) |
Ending balance |  | $ (64) | $ (145) | $ (64) |  | $ (145) |
[1] | Reclassifications from AOCL, net of tax, related to our postretirement benefit plans were recorded as a component of net periodic benefit cost for each period presented (Note 7). These amounts include $175 million and $212 million for the quarters ended September 25, 2016 and September 27, 2015, which are composed of the recognition of net actuarial losses of $234 million and $277 million for the quarters ended September 25, 2016 and September 27, 2015 and the amortization of net prior service (credits) costs of $(59) million and $(65) million for the quarters ended September 25, 2016 and September 27, 2015.
[2] | Associated with the divestiture of the IS&GS business segment and included in net gain on divestiture of discontinued operations.

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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