Reportable Segments Reportable Segment Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Jan. 02, 2016	Oct. 03, 2015	Jul. 04, 2015	Apr. 04, 2015	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Segment Reporting Information [Line Items]
Assets		$ 15,265				$ 15,153				$ 15,265	$ 15,153	$ 15,474
Net sales		3,142	$ 3,329	$ 3,498	$ 3,556	3,514	$ 3,639	$ 3,685	$ 3,742	13,525	14,580	14,792
Operating profit										1,091	1,024	2,837
Depreciation and amortization	[1]									534	503	532
Interest expense										227	209	235
Income taxes										159	186	792
Property, Plant and Equipment, Additions										553	582	637
U.S. Morning Foods
Segment Reporting Information [Line Items]
Net sales										2,992	3,108	3,195
Operating profit										474	479	469
Depreciation and amortization	[1]									123	136	181
U.S. Snacks
Segment Reporting Information [Line Items]
Net sales										3,234	3,329	3,379
Operating profit										385	364	424
Depreciation and amortization	[1]									135	166	144
U.S. Specialty
Segment Reporting Information [Line Items]
Net sales										1,181	1,198	1,202
Operating profit										260	266	265
Depreciation and amortization	[1]									11	10	8
North America Other
Segment Reporting Information [Line Items]
Net sales										1,687	1,864	1,940
Operating profit										178	295	314
Depreciation and amortization	[1]									74	32	30
Interest expense										5	6	6
North America [Member]
Segment Reporting Information [Line Items]
Assets		10,363				10,489				10,363	10,489	10,643
Property, Plant and Equipment, Additions										342	295	296
Europe
Segment Reporting Information [Line Items]
Assets		3,742				2,893				3,742	2,893	3,007
Net sales										2,497	2,869	2,843
Operating profit										247	232	249
Depreciation and amortization	[1]									120	92	84
Interest expense										5	5	6
Income taxes										10	(3)	4
Property, Plant and Equipment, Additions										110	129	182
Latin America
Segment Reporting Information [Line Items]
Assets		587				905				587	905	1,052
Net sales										1,015	1,205	1,195
Operating profit										9	169	157
Depreciation and amortization	[1]									28	32	29
Interest expense										5	3	1
Income taxes										34	42	35
Property, Plant and Equipment, Additions										23	31	70
Asia Pacific
Segment Reporting Information [Line Items]
Assets		1,106				1,111				1,106	1,111	1,049
Net sales										919	1,007	1,038
Operating profit										54	53	67
Depreciation and amortization	[1]									29	31	40
Interest expense										2	1	3
Income taxes										0	(1)	6
Property, Plant and Equipment, Additions										76	120	85
Total Reportable Segments [Member]
Segment Reporting Information [Line Items]
Operating profit										1,607	1,858	1,945
Depreciation and amortization	[1]									520	499	516
Corporate
Segment Reporting Information [Line Items]
Assets		1,198				1,796				1,198	1,796	2,583
Operating profit										(516)	(834)	892
Depreciation and amortization	[1]									14	4	16
Interest expense										210	194	219
Property, Plant and Equipment, Additions										2	7	4
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Assets		$ (1,731)				$ (2,041)				(1,731)	(2,041)	(2,860)
Corporate And North America [Member]
Segment Reporting Information [Line Items]
Income taxes										$ 115	$ 148	$ 747

[1] Includes asset impairment charges as discussed in Note 13.