Restructuring and Cost Reduction Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 325	$ 323	$ 298
Program cost to date	1,154
Employee related cost
Restructuring Cost and Reserve [Line Items]
Restructuring charge	109	62	90
Program cost to date	368
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charge	46	103	37
Program cost to date	192
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charge	50	18	21
Program cost to date	155
Other cost
Restructuring Cost and Reserve [Line Items]
Restructuring charge	120	140	150
Program cost to date	439
U.S. Morning Foods
Restructuring Cost and Reserve [Line Items]
Restructuring charge	23	58	60
Program cost to date	241
U.S. Snacks
Restructuring Cost and Reserve [Line Items]
Restructuring charge	76	50	57
Program cost to date	202
U.S. Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring charge	8	5	3
Program cost to date	19
North America Other
Restructuring Cost and Reserve [Line Items]
Restructuring charge	38	63	18
Program cost to date	128
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charge	126	74	80
Program cost to date	299
Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charge	8	4	8
Program cost to date	24
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring charge	7	13	37
Program cost to date	81
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charge	39	$ 56	$ 35
Program cost to date	$ 160