Exit or Disposal Activities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended						36 Months Ended
	Dec. 31, 2011		Jan. 01, 2011		Jan. 02, 2010		Dec. 31, 2011		Jan. 03, 2009
Employee severance					$ 42
Other cash costs					14
Asset write-offs			29		6
Pension costs					3
Total					65
Upon completion of initiatives time period expected recovery of cash implementation costs, in years	5
COGS Program [Member]
Total					40
SGA Programs [Member]
Total	14		15		25
COGS and SGA Programs [Member]
Employee severance	7		6		32		45
Other cash costs	2	[1]	7	[1]	14	[1]	23	[1]
Asset write-offs	3		1		0		4
Pension costs	12	[2]	5	[2]	3	[2]	20	[2]
Total	24		19		49		92
Severance reserves	1		5		18		1		0
Additional expected program costs	7
U.S. Morning Foods and Kashi [Member] | COGS Program [Member]
Total					4
U.S. Morning Foods and Kashi [Member] | SGA Programs [Member]
Total			2		4
U.S. Morning Foods and Kashi [Member] | COGS and SGA Programs [Member]
Total							10
U.S. Snacks [Member] | COGS Program [Member]
Total					9
U.S. Snacks [Member] | SGA Programs [Member]
Total	13		8		3
U.S. Snacks [Member] | COGS and SGA Programs [Member]
Total							33
U.S. Specialty [Member] | SGA Programs [Member]
Total					2
U.S. Specialty [Member] | COGS and SGA Programs [Member]
Total							2
North America Other [Member] | COGS Program [Member]
Total					1
North America Other [Member] | SGA Programs [Member]
Total			1		1
North America Other [Member] | COGS and SGA Programs [Member]
Total							3
Europe [Member] | COGS Program [Member]
Total	10		4		16
Europe [Member] | SGA Programs [Member]
Total	1		2		13
Europe [Member] | COGS and SGA Programs [Member]
Total							39
Asia Pacific [Member] | COGS Program [Member]
Total					1
Asia Pacific [Member] | SGA Programs [Member]
Total			2		1
Asia Pacific [Member] | COGS and SGA Programs [Member]
Total							4
Latin America [Member] | COGS Program [Member]
Total					9
Latin America [Member] | SGA Programs [Member]
Total					1
Latin America [Member] | COGS and SGA Programs [Member]
Total							$ 1

[1] Includes cash costs for equipment removal and relocation.

[2] Pension plan curtailment losses and special termination benefits.