Exit or Disposal Activities (Narrative) (Details) (COGS and SGA Programs [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 2		$ 6	$ 8
Other cash costs including relocation of assets and employees		1		1	3
Asset write-offs		1		2	5
Pension costs		6		12	17
Total charges and program costs incurred	1	10	5	21
Additional expected program costs			3
Total charges and program costs incurred to date					33
U.S. Morning Foods and Kashi [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			1
Total charges and program costs incurred to date					1
U.S. Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs			2
Asset write-offs	1		1
Total charges and program costs incurred		7		13
Total charges and program costs incurred to date					22
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Asset write-offs			1
Total charges and program costs incurred		3		8
Total charges and program costs incurred to date					$ 10