Goodwill and Other Intangible Assets (Carrying Amount of Goodwill) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended			12 Months Ended
	Jun. 29, 2013		Jun. 30, 2012	Dec. 29, 2012
Change in carrying amount of goodwill
Beginning Balance	$ 5,038	[1],[2]
Goodwill additions	11
Currency translation adjustment	(30)		2	(15)
Ending Balance	5,019			5,038	[1],[2]
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	3,767
Goodwill additions	11
Currency translation adjustment	0
Ending Balance	3,778
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	280
Goodwill additions	0
Currency translation adjustment	(2)
Ending Balance	278
Europe [Member]
Change in carrying amount of goodwill
Beginning Balance	438
Goodwill additions	0
Currency translation adjustment	(16)
Ending Balance	422
Latin America [Member]
Change in carrying amount of goodwill
Beginning Balance	92
Goodwill additions	0
Currency translation adjustment	(3)
Ending Balance	89
Asia Pacific [Member]
Change in carrying amount of goodwill
Beginning Balance	246
Goodwill additions	0
Currency translation adjustment	(9)
Ending Balance	$ 237

[1] Condensed from audited financial statements.

[2] Amounts have been revised as discussed in Note 2 to the financial statements.