Goodwill and Other Intangible Assets (Carrying Amount of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2014
Change in carrying amount of goodwill
Beginning Balance	$ 5,051	[1]
Goodwill additions	0
Currency translation adjustment	(2)
Ending Balance	5,049
U.S. Morning Foods [Member]
Change in carrying amount of goodwill
Beginning Balance	133
Goodwill additions	0
Currency translation adjustment	0
Ending Balance	133
U.S. Snacks [Member]
Change in carrying amount of goodwill
Beginning Balance	3,779
Goodwill additions	0
Currency translation adjustment	0
Ending Balance	3,779
U.S. Specialty [Member]
Change in carrying amount of goodwill
Beginning Balance	82
Goodwill additions	0
Currency translation adjustment	0
Ending Balance	82
North America Other [Member]
Change in carrying amount of goodwill
Beginning Balance	278
Goodwill additions	0
Currency translation adjustment	(3)
Ending Balance	275
Europe [Member]
Change in carrying amount of goodwill
Beginning Balance	452
Goodwill additions	0
Currency translation adjustment	0
Ending Balance	452
Latin America [Member]
Change in carrying amount of goodwill
Beginning Balance	89
Goodwill additions	0
Currency translation adjustment	0
Ending Balance	89
Asia Pacific [Member]
Change in carrying amount of goodwill
Beginning Balance	238
Goodwill additions	0
Currency translation adjustment	1
Ending Balance	$ 239

[1] Condensed from audited financial statements.