Goodwill and Other Intangible Assets (Intangible Assets not Subject to Amortization) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 04, 2015
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	$ 2,206	[1]
Indefinite-lived Intangible Assets, Acquired During Period	25
Currency translation adjustment	(38)
Ending Balance	2,193
U.S. Morning Foods [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	0	[1]
Currency translation adjustment	0
Ending Balance	0
U.S. Snacks [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	1,625	[1]
Currency translation adjustment	0
Ending Balance	1,625
U.S. Specialty [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	0	[1]
Currency translation adjustment	0
Ending Balance	0
North America Other [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	158	[1]
Currency translation adjustment	0
Ending Balance	158
Europe [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	423	[1]
Indefinite-lived Intangible Assets, Acquired During Period	25
Currency translation adjustment	(38)
Ending Balance	410
Latin America [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	0	[1]
Currency translation adjustment	0
Ending Balance	0
Asia Pacific [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Beginning Balance	0	[1]
Currency translation adjustment	0
Ending Balance	$ 0

[1] * In conjunction with the establishment of the Kashi operating segment, included within the North America Other reportable segment, goodwill was reallocated on a relative fair value basis. All prior period balances were updated to conform with current presentation. See Note 12 for further discussion.