Exit or Disposal Activities (Project K Program Charges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 78	$ 7	$ 132	$ 20
Maximum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Estimated cash costs for program			1,100
Restructuring and related costs, expected cost			1,400
Minimum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Estimated cash costs for program			900
Restructuring and related costs, expected cost			1,200
U.S. Morning Foods [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	15	2	26	5
Restructuring and related cost, expected cost allocation			17.00%
U.S. Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	3	3	10	6
Restructuring and related cost, expected cost allocation			10.00%
U.S. Specialty [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	0	1	1	2
Restructuring and related cost, expected cost allocation			1.00%
North America Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	6	1	9	1
Restructuring and related cost, expected cost allocation			3.00%
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	28	0	40	0
Restructuring and related cost, expected cost allocation			10.00%
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	1	0	5	0
Restructuring and related cost, expected cost allocation			2.00%
Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	5	0	11	6
Restructuring and related cost, expected cost allocation			6.00%
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	20	0	30	0
Restructuring and related cost, expected cost allocation			51.00%
Employee related costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	35	1	52	5
Employee related costs [Member] | Maximum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			475
Employee related costs [Member] | Minimum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			425
Asset related costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7	0	10	5
Asset related costs [Member] | Maximum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			500
Asset related costs [Member] | Minimum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			450
Other costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	36	6	70	10
Other costs [Member] | Maximum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			425
Other costs [Member] | Minimum [Member] | Project K [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, expected cost			$ 325