Acquisitions, Goodwill and Other Intangible Assets (Carrying Amount of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 29, 2012	Dec. 31, 2011
Changes in the carrying amount of goodwill
Balance	$ 3,623	$ 3,628
Currency translation adjustment	48	(5)
Balance	5,053	3,623
Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	1,306
Other [Member]
Changes in the carrying amount of goodwill
Goodwill	76
U.S. Morning Foods and Kashi [Member]
Changes in the carrying amount of goodwill
Balance	80	80
Currency translation adjustment	0	0
Balance	124	80
U.S. Morning Foods and Kashi [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	44
U.S. Morning Foods and Kashi [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	0
U.S. Snacks [Member]
Changes in the carrying amount of goodwill
Balance	3,257	3,257
Currency translation adjustment	0	0
Balance	3,903	3,257
U.S. Snacks [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	570
U.S. Snacks [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	76
U.S. Specialty [Member]
Changes in the carrying amount of goodwill
Balance	0	0
Currency translation adjustment	0	0
Balance	13	0
U.S. Specialty [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	13
U.S. Specialty [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	0
North America Other [Member]
Changes in the carrying amount of goodwill
Balance	202	202
Currency translation adjustment	0	0
Balance	220	202
North America Other [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	18
North America Other [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	0
Europe [Member]
Changes in the carrying amount of goodwill
Balance	57	62
Currency translation adjustment	31	(5)
Balance	520	57
Europe [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	432
Europe [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	0
Latin America [Member]
Changes in the carrying amount of goodwill
Balance	0	0
Currency translation adjustment	7	0
Balance	107	0
Latin America [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	100
Latin America [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	0
Asia Pacific [Member]
Changes in the carrying amount of goodwill
Balance	27	27
Currency translation adjustment	10	0
Balance	166	27
Asia Pacific [Member] \| Pringles [Member]
Changes in the carrying amount of goodwill
Goodwill	129
Asia Pacific [Member] \| Other [Member]
Changes in the carrying amount of goodwill
Goodwill	$ 0

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

+ Details