Reportable Segments (Details) $ in Millions		3 Months Ended			6 Months Ended
		Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)		Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)
Segment Reporting Information [Line Items]
Venezuela remeasurement			$ 7			$ 13
Number of operating segments					9
Number of remaining reportable segments based on geographical locations					3
Net sales		$ 3,187	3,268		$ 6,441	6,663
Operating profit		453	449		813	887
Mark-to-market adjustments for pension plans, commodity and foreign currency contracts		7	20		(14)	(4)
Operating Segments
Segment Reporting Information [Line Items]
Operating profit		448	441		830	913
Operating Segments | U.S. Morning Foods
Segment Reporting Information [Line Items]
Net sales		679	727		1,398	1,494
Operating profit		176	165		336	313
Operating Segments | U.S. Snacks
Segment Reporting Information [Line Items]
Net sales		803	803		1,584	1,635
Operating profit		22	69		(22)	152
Operating Segments | U.S. Specialty
Segment Reporting Information [Line Items]
Net sales		276	271		671	647
Operating profit		70	60		166	146
Operating Segments | North America Other
Segment Reporting Information [Line Items]
Net sales		391	406		784	820
Operating profit		59	47		108	92
Operating Segments | Europe
Segment Reporting Information [Line Items]
Net sales		566	629		1,078	1,227
Operating profit		76	68		142	138
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Net sales		234	204		456	396
Operating profit		26	20	[1]	59	43	[1]
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Net sales		238	228		470	444
Operating profit		19	12		41	29
Corporate
Segment Reporting Information [Line Items]
Operating profit	[2]	$ 5	$ 8		$ (17)	$ (26)

[1] Includes non-cash losses totaling $7 million and $13 million associated with the remeasurement of the financial statements of the Company's Venezuela subsidiary during the quarter and year-to-date periods ended July 2, 2016, respectively.

[2] Includes mark-to-market adjustments for pension and postretirement plans, commodity and foreign currency contracts totaling $7 million and $20 million for the quarters ended July 1, 2017 and July 2, 2016, respectively. Includes mark-to-market adjustments for pension and postretirement plans, commodity and foreign currency contracts totaling ($14) million and ($4) million for the year-to-date periods ended July 1, 2017 and July 2, 2016, respectively.