Restructuring and Cost Reduction Activities - Schedule of Restructuring and Cost Reduction Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 142	$ 52
Program costs to date	1,296
Employee related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	111	14
Program costs to date	479
Asset impairment
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0
Program costs to date	155
Asset related costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10	10
Program costs to date	202
Other costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	21	28
Program costs to date	460
Operating Segments | U.S. Morning Foods
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1	5
Program costs to date	242
Operating Segments | U.S. Snacks
Restructuring Cost and Reserve [Line Items]
Restructuring charges	120	20
Program costs to date	322
Operating Segments | U.S. Specialty
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	2
Program costs to date	19
Operating Segments | North America Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7	9
Program costs to date	135
Operating Segments | Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6	14
Program costs to date	305
Operating Segments | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1	0
Program costs to date	25
Operating Segments | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1	0
Program costs to date	82
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	6	$ 2
Program costs to date	$ 166