Exit or Disposal Activities (Project K Program Charges) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	$ 92	$ 29	$ 224	$ 49
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	7	41	12
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	32	4	42	10
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	1	1	2	3
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	2	0	11	1
Restructuring and related cost, expected cost allocation			3.00%
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	23	6	63	6
Restructuring and related cost, expected cost allocation			12.00%
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	1	3	6	3
Restructuring and related cost, expected cost allocation			3.00%
Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	11	1	22	7
Restructuring and related cost, expected cost allocation			6.00%
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	7	7	37	7
Restructuring and related cost, expected cost allocation			48.00%
Employee related costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	22	12	74	17
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	6	0	16	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
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	21	0	21	0
Other costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, incurred cost	43	17	113	27
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