Goodwill and Other Intangible Assets - Intangible Assets Not Subject to Amortization (Details) $ in Millions	9 Months Ended
	Oct. 03, 2015 USD ($)
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	$ 2,206	[1]
Additions	36
Currency translation adjustment	(30)
Intangible assets not subject to amortization, ending balance	2,212
U.S. Morning Foods
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	0	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	0
U.S. Snacks
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	1,625	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	1,625
U.S. Specialty
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	0	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	0
North America Other
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	158	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	158
Europe
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	423	[1]
Additions	36
Currency translation adjustment	(30)
Intangible assets not subject to amortization, ending balance	429
Latin America
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	0	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	0
Asia Pacific
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	0	[1]
Additions	0
Currency translation adjustment	0
Intangible assets not subject to amortization, ending balance	$ 0

[1] In conjunction with the establishment of the Kashi operating segment, included within the North America Other reportable segment, certain intangible assets were reallocated. All prior period balances were updated to conform with current presentation. See Note 13 for further discussion.