Reportable Segments (Details) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)	Oct. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments			9
Number of remaining reportable segments based on geographical locations			3
Net sales	$ 3,329	$ 3,639	$ 10,383	$ 11,066
Operating profit (loss)	334	365	1,130	1,446
Non-cash gain from deconsolidation			49	0
Venezuela remeasurement expense			165	0
Mark-to-market adjustments for pension plans, commodity and foreign currency contracts	(27)	(66)	(59)	38
Operating Profit [Member]
Segment Reporting Information [Line Items]
Non-cash gain from deconsolidation			67
Venezuela remeasurement expense	13		115
Operating Segments
Segment Reporting Information [Line Items]
Operating profit (loss)	373	429	1,239	1,440
Operating Segments | U.S. Morning Foods
Segment Reporting Information [Line Items]
Net sales	762	782	2,280	2,340
Operating profit (loss)	110	115	368	378
Operating Segments | U.S. Snacks
Segment Reporting Information [Line Items]
Net sales	795	807	2,484	2,522
Operating profit (loss)	62	59	302	269
Operating Segments | U.S. Specialty
Segment Reporting Information [Line Items]
Net sales	281	270	912	918
Operating profit (loss)	63	59	200	209
Operating Segments | North America Other
Segment Reporting Information [Line Items]
Net sales	426	470	1,298	1,416
Operating profit (loss)	44	69	140	226
Operating Segments | Europe
Segment Reporting Information [Line Items]
Net sales	628	720	1,885	2,192
Operating profit (loss)	73	59	191	174
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Net sales	202	320	825	918
Operating profit (loss)	7	50	2	145
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Net sales	235	270	699	760
Operating profit (loss)	14	18	36	39
Corporate
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (39)	$ (64)	$ (109)	$ 6