Restructuring and Cost Reduction Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015	Jan. 02, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring plan, number of years	5 years
Restructuring and related costs since inception of program	$ 881
Restructuring Charges	52
Restructuring and related cost, incurred cost	52	$ 68
Exit cost reserves	81		$ 88
Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost		2
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	18	32
Selling General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	34	34
Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	273
Restructuring Charges	14
Restructuring and related cost, incurred cost	14	17
Exit cost reserves	49		55
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	156
Restructuring Charges	10
Restructuring and related cost, incurred cost	10	23
Exit cost reserves	0		0
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	105
Restructuring Charges	0
Restructuring and related cost, incurred cost	0	0
Exit cost reserves	0		0
Other costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	347
Restructuring Charges	28
Restructuring and related cost, incurred cost	28	28
Exit cost reserves	$ 32		$ 33
Project K
Restructuring Cost and Reserve [Line Items]
Restructuring plan, number of years	4 years
Restructuring and related costs since inception of program	$ 862
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	535
Project K | Selling General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	321
Project K | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, 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 costs, 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 | Employee related costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	$ 400
Project K | Employee related costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	450
Project K | Asset related costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	400
Project K | Asset related costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	450
Project K | Other costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	400
Project K | Other costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	500
Zero Based Budgeting
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	19
Restructuring Charges	7
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	123
Restructuring and related cost, incurred cost	$ 2	$ 20
Corporate | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost allocation	33.00%