Reportable Segments Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Segment Reporting Information [Line Items]
Assets		$ 15,111				$ 15,251				$ 15,111	$ 15,251	$ 15,139
Net sales		3,097	$ 3,254	$ 3,268	$ 3,395	3,142	$ 3,329	$ 3,498	$ 3,556	13,014	13,525	14,580
Operating profit										1,395	1,091	1,024
Depreciation and amortization	[1]									517	534	503
Interest expense										406	227	209
Income taxes										233	159	186
Property, Plant and Equipment, Additions										507	553	582
U.S. Morning Foods
Segment Reporting Information [Line Items]
Net sales										2,931	2,992	3,108
Operating profit										593	474	479
Depreciation and amortization	[1]									122	123	136
U.S. Snacks
Segment Reporting Information [Line Items]
Net sales										3,198	3,234	3,329
Operating profit										324	385	364
Depreciation and amortization	[1]									159	135	166
U.S. Specialty
Segment Reporting Information [Line Items]
Net sales										1,214	1,181	1,198
Operating profit										279	260	266
Depreciation and amortization	[1]									11	11	10
North America Other
Segment Reporting Information [Line Items]
Net sales										1,598	1,687	1,864
Operating profit										181	178	295
Depreciation and amortization	[1]									56	74	32
Interest expense										5	5	6
North America [Member]
Segment Reporting Information [Line Items]
Assets		10,533				10,363				10,533	10,363	10,488
Property, Plant and Equipment, Additions										318	342	295
Europe
Segment Reporting Information [Line Items]
Assets		3,824				3,742				3,824	3,742	2,893
Net sales										2,377	2,497	2,869
Operating profit										205	247	232
Depreciation and amortization	[1]									114	120	92
Interest expense										8	5	5
Income taxes										(17)	10	(3)
Property, Plant and Equipment, Additions										125	110	129
Latin America
Segment Reporting Information [Line Items]
Assets		1,136				587				1,136	587	905
Net sales										780	1,015	1,205
Operating profit										84	9	169
Depreciation and amortization	[1]									22	28	32
Interest expense										4	5	3
Income taxes										30	34	42
Property, Plant and Equipment, Additions										24	23	31
Asia Pacific
Segment Reporting Information [Line Items]
Assets		1,158				1,106				1,158	1,106	1,111
Net sales										916	919	1,007
Operating profit										70	54	53
Depreciation and amortization	[1]									30	29	31
Interest expense										2	2	1
Income taxes										14	0	(1)
Property, Plant and Equipment, Additions										36	76	120
Total Reportable Segments [Member]
Segment Reporting Information [Line Items]
Operating profit										1,736	1,607	1,858
Depreciation and amortization	[1]									514	520	499
Corporate
Segment Reporting Information [Line Items]
Assets		1,248				1,184				1,248	1,184	1,783
Operating profit										(341)	(516)	(834)
Depreciation and amortization	[1]									3	14	4
Interest expense										387	210	194
Property, Plant and Equipment, Additions										4	2	7
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Assets		$ (2,788)				$ (1,731)				(2,788)	(1,731)	(2,041)
Corporate And North America [Member]
Segment Reporting Information [Line Items]
Income taxes										$ 206	$ 115	$ 148

[1] Includes asset impairment charges as discussed in Note 14.