Goodwill and Other Intangible Assets - Intangible Assets Not Subject to Amortization (Details) $ in Millions		6 Months Ended
		Jul. 04, 2015 USD ($)
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	[1]	$ 2,206
Additions		25
Currency translation adjustment		(34)
Intangible assets not subject to amortization, ending balance		2,197
U.S. Morning Foods
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	[1]	0
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]	1,625
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	[1]	0
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	[1]	158
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	[1]	423
Additions		25
Currency translation adjustment		(34)
Intangible assets not subject to amortization, ending balance		414
Latin America
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	[1]	0
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	[1]	0
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 12 for further discussion.