Exit or Disposal Activities (All Projects) (Details) (Total Costs [Member], USD $) In Millions, unless otherwise specified	12 Months Ended			31 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Jan. 03, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	$ 298	$ 250	$ 56
Restructuring and related costs, costs incurred to date				506
COGS [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	152	195	43
SGA [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	144	55	13
Net Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	2
U.S. Morning Foods [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	60	109	16
Restructuring and related costs, costs incurred to date				160
U.S. Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	57	30	10
Restructuring and related costs, costs incurred to date				76
U.S. Specialty [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	3	5	1
Restructuring and related costs, costs incurred to date				6
North America Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	18	11	6
Restructuring and related costs, costs incurred to date				27
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	80	27	3
Restructuring and related costs, costs incurred to date				99
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	8	5	2
Restructuring and related costs, costs incurred to date				12
Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	37	32	18
Restructuring and related costs, costs incurred to date				61
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	35	31	0
Restructuring and related costs, costs incurred to date				65
Employee Related Cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	90	114	0
Restructuring and related costs, costs incurred to date				197
Asset Related Cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	37	10	4
Restructuring and related costs, costs incurred to date				43
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	21	70	17
Restructuring and related costs, costs incurred to date				87
Other Cost [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs, incurred cost	150	56	35
Restructuring and related costs, costs incurred to date				$ 179