Restructuring and Cost Reduction Activities - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring plan, number of years			5 years
Restructuring and related costs since inception of program	$ 749		$ 749
Restructuring and related cost, incurred cost	85	$ 92	243	$ 224
Exit cost reserves	73		73		$ 110
Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	(2)		(4)
Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	57	64	154	120
Selling General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	26	28	85	104
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	105		105
Restructuring and related cost, incurred cost	15	6	62	16
Exit cost reserves	0		0		0
Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	261		261
Restructuring and related cost, incurred cost	31	22	64	74
Exit cost reserves	62		62		96
Other costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	278		278
Restructuring and related cost, incurred cost	39	43	99	113
Exit cost reserves	11		11		14
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	105		105
Restructuring and related cost, incurred cost	0	21	18	21
Exit cost reserves	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	749		$ 749
Project K | Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	(6)		(6)
Project K | Cost of Goods Sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	480		480
Project K | Selling General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	263		263
Project K | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	1,200		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		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			12.00%
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			9.00%
Project K | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost allocation			14.00%
Project K | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost allocation			3.00%
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 costs, expected cost	450		$ 450
Project K | Asset related costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	500		500
Project K | Employee related costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	425		425
Project K | Employee related costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	475		475
Project K | Other costs | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	325		325
Project K | Other costs | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost	425		425
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs since inception of program	112		112
Restructuring and related cost, incurred cost	$ 13	$ 7	$ 47	$ 37
Corporate | Project K
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost allocation			37.00%