Shareholders' Equity (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 21, 2015	Mar. 22, 2014
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (190)
Other comprehensive income (loss), net of tax	(82)	(37)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(271)
Translation Adjustments and Gains (Losses) From Intra-Entity Transactions of a Long-Term Nature
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	29
Gains (losses) arising during the year classified into accumulated OCI, net of tax	(88)
(Gains) losses reclassified from accumulated OCI, net of tax	0
Other comprehensive income (loss), net of tax	(88)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(59)
Pension and Post-Retirement Benefits
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	(210)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	0
(Gains) losses reclassified from accumulated OCI, net of tax	7
Other comprehensive income (loss), net of tax	7
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(203)
Derivative Instruments
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	(9)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	8
(Gains) losses reclassified from accumulated OCI, net of tax	(8)
Other comprehensive income (loss), net of tax	0
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	(9)
Total
Schedule of changes in accumulated comprehensive income [Line Items]
Beginning Accumulated Other Comprehensive Income (Loss), Net of Tax	(190)
Gains (losses) arising during the year classified into accumulated OCI, net of tax	(80)
(Gains) losses reclassified from accumulated OCI, net of tax	(1)
Other comprehensive income (loss), net of tax	(81)
Ending Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (271)

- 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.

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