Acquisitions, Goodwill and Other Intangible Assets (Carrying Amount of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2012
Change in carrying amount of goodwill
Beginning Balance	$ 3,623	[1]
Pringles goodwill	1,375
Currency translation adjustment	27
Ending Balance	5,025
U.S. Morning Foods and Kashi [Member]
Change in carrying amount of goodwill
Beginning Balance	80
Pringles goodwill	147
Currency translation adjustment	0
Ending Balance	227
U.S. Snacks [Member]
Change in carrying amount of goodwill
Beginning Balance	3,257
Pringles goodwill	399
Currency translation adjustment	0
Ending Balance	3,656
U.S. Specialty [Member]
Change in carrying amount of goodwill
Beginning Balance	0
Pringles goodwill	43
Currency translation adjustment	0
Ending Balance	43
North America Other [Member]
Change in carrying amount of goodwill
Beginning Balance	202
Pringles goodwill	58
Currency translation adjustment	0
Ending Balance	260
Europe [Member]
Change in carrying amount of goodwill
Beginning Balance	57
Pringles goodwill	488
Currency translation adjustment	23
Ending Balance	568
Latin America [Member]
Change in carrying amount of goodwill
Beginning Balance	0
Pringles goodwill	76
Currency translation adjustment	0
Ending Balance	76
Asia Pacific [Member]
Change in carrying amount of goodwill
Beginning Balance	27
Pringles goodwill	164
Currency translation adjustment	4
Ending Balance	$ 195

[1] * Condensed from audited financial statements.