Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets - Intangible Assets Not Subject to Amortization (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 02, 2016	Jan. 03, 2015
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		$ 2,206	$ 2,265
Additions		36
Currency translation adjustment		(43)	(59)
Intangible assets not subject to amortization, ending balance		2,199	2,206
U.S. Morning Foods
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	[1]	0	0
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		0	0	[1]
U.S. Snacks
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		1,625	1,625
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		1,625	1,625
U.S. Specialty
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		0	0
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		0	0
North America Other
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance	[1]	158	158
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		158	158	[1]
Europe
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		423	482
Additions		36
Currency translation adjustment		(43)	(59)
Intangible assets not subject to amortization, ending balance		416	423
Latin America
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		0	0
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		0	0
Asia Pacific
Indefinite-lived Intangible Assets [Roll Forward]
Intangible assets not subject to amortization, beginning balance		0	0
Additions		0
Currency translation adjustment		0	0
Intangible assets not subject to amortization, ending balance		$ 0	$ 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.