Restructuring and Cost Reduction Activities Schedule of Restructuring and Cost Reduction Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 323	$ 298	$ 250
Program cost to date	829
Employee related cost
Restructuring Cost and Reserve [Line Items]
Restructuring charge	62	90	114
Program cost to date	259
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charge	103	37	10
Program cost to date	146
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charge	18	21	70
Program cost to date	105
Other cost
Restructuring Cost and Reserve [Line Items]
Restructuring charge	140	150	56
Program cost to date	319
U.S. Morning Foods
Restructuring Cost and Reserve [Line Items]
Restructuring charge	58	60	109
Program cost to date	218
U.S. Snacks
Restructuring Cost and Reserve [Line Items]
Restructuring charge	50	57	30
Program cost to date	126
U.S. Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring charge	5	3	5
Program cost to date	11
North America Other
Restructuring Cost and Reserve [Line Items]
Restructuring charge	63	18	11
Program cost to date	90
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charge	74	80	27
Program cost to date	173
Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charge	4	8	5
Program cost to date	16
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring charge	13	37	32
Program cost to date	74
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charge	56	$ 35	$ 31
Program cost to date	$ 121