Restructuring, Impairment and Integration Charges 2014 Productivity Plan Activity (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 21, 2015	Mar. 22, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring, Settlement and Impairment Provisions	$ 0	$ (3)
Payments for Restructuring	(47)us-gaap_PaymentsForRestructuring	(25)us-gaap_PaymentsForRestructuring
2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Period Start	113
Restructuring, Settlement and Impairment Provisions	30	96
Payments for Restructuring	(36)
Restructuring Reserve, Settled without Cash	(5)
Restructuring Reserve - Period End	102
Employee Severance [Member] \| 2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Period Start	89
Restructuring, Settlement and Impairment Provisions	11
Payments for Restructuring	(16)
Restructuring Reserve, Settled without Cash	(3)
Restructuring Reserve - Period End	81
Asset Impairment [Member] \| 2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Period Start	0
Restructuring, Settlement and Impairment Provisions	1
Payments for Restructuring	0
Restructuring Reserve, Settled without Cash	(1)
Restructuring Reserve - Period End	0
Other Costs [Member] \| 2014 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve - Period Start	24
Restructuring, Settlement and Impairment Provisions	18
Payments for Restructuring	(20)
Restructuring Reserve, Settled without Cash	(1)
Restructuring Reserve - Period End	$ 21

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

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Amount of consideration other than cash used to fully or partially settle an accrued restructuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b)(2))

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The aggregate amount provided for estimated restructuring charges, remediation costs, and asset impairment loss during an accounting period. Generally, these items are either unusual or infrequent, but not both (in which case they would be extraordinary items).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

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