Restructuring and Cost Reduction Activities Restructuring and Cost Reduction Activities Narrative (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Oct. 03, 2015	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring plan, number of years	5 years
Restructuring and related costs since inception of program		$ 829
Restructuring charge		323	$ 298
Restructuring and Related Cost, Incurred Cost		323	298	$ 250
Exit cost reserve		88	110	78
Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		4	2
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		191	152	195
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost		128	144	55
U.S. Morning Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		218
Restructuring and Related Cost, Incurred Cost		58	60	109
U.S. Snacks
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		126
Restructuring and Related Cost, Incurred Cost		50	57	30
U.S. Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		11
Restructuring and Related Cost, Incurred Cost		5	3	5
North America Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		90
Restructuring and Related Cost, Incurred Cost		63	18	11
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		173
Restructuring and Related Cost, Incurred Cost		74	80	27
Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		16
Restructuring and Related Cost, Incurred Cost		4	8	5
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		74
Restructuring and Related Cost, Incurred Cost		13	37	32
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		146
Restructuring charge		103	37
Restructuring and Related Cost, Incurred Cost		103	37	10
Exit cost reserve		0	0	0
Employee related cost
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		259
Restructuring charge		62	90
Restructuring and Related Cost, Incurred Cost		62	90	114
Exit cost reserve		55	96	66
Other cost
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		319
Restructuring charge		140	150
Restructuring and Related Cost, Incurred Cost		140	150	56
Exit cost reserve		33	14	12
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		105
Restructuring charge		18	21
Restructuring and Related Cost, Incurred Cost		18	21	70
Exit cost reserve		$ 0	0	0
Project K
Restructuring Cost and Reserve [Line Items]
Restructuring plan, number of years		4 years
Restructuring and related costs since inception of program		$ 817
Project K | Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		6
Project K | Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		517
Project K | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		294
Project K | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		1,200
Estimated after-tax cash costs for program, including incremental capital investments		900
Project K | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		1,400
Estimated after-tax cash costs for program, including incremental capital investments		$ 1,100
Project K | U.S. Morning Foods
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		18.00%
Project K | U.S. Snacks
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		13.00%
Project K | U.S. Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		1.00%
Project K | North America Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		10.00%
Project K | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		17.00%
Project K | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		2.00%
Project K | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		6.00%
Project K | Asset related costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		$ 400
Project K | Asset related costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		450
Project K | Employee related cost | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		400
Project K | Employee related cost | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		450
Project K | Other cost | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		400
Project K | Other cost | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		500
ZBB
Restructuring Cost and Reserve [Line Items]
Restructuring charge		12
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program		121
Restructuring and Related Cost, Incurred Cost		$ 56	$ 35	$ 31
Corporate | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost expected cost allocation		33.00%