Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jul. 02, 2016 USD ($)
Change in carrying amount of goodwill
Beginning Balance	$ 4,968	[1]
Currency translation adjustment	(5)
Ending Balance	4,963
U.S. Morning Foods
Change in carrying amount of goodwill
Beginning Balance	131
Currency translation adjustment	0
Ending Balance	131
U.S. Snacks
Change in carrying amount of goodwill
Beginning Balance	3,568
Currency translation adjustment	0
Ending Balance	3,568
U.S. Specialty
Change in carrying amount of goodwill
Beginning Balance	82
Currency translation adjustment	0
Ending Balance	82
North America Other
Change in carrying amount of goodwill
Beginning Balance	456
Currency translation adjustment	3
Ending Balance	459
Europe
Change in carrying amount of goodwill
Beginning Balance	431
Currency translation adjustment	(8)
Ending Balance	423
Latin America
Change in carrying amount of goodwill
Beginning Balance	76
Currency translation adjustment	(1)
Ending Balance	75
Asia Pacific
Change in carrying amount of goodwill
Beginning Balance	224
Currency translation adjustment	1
Ending Balance	$ 225

[1] Condensed from audited financial statements.