Exit or Disposal Activities (Narrative) (Details) (COGS and SGA Programs [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		42 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]
Severance costs				$ 4	$ 12
Other cash costs					3
Asset write-offs				1	4
Pension costs				6	17
Total charges and program costs incurred	4	6	4	11
Additional expected program costs			3
Total charges and program costs incurred to date					36
U.S. Morning Foods and Kashi [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	1		1
Total charges and program costs incurred to date					1
U.S. Snacks [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs	2		2
Pension costs		6
Total charges and program costs incurred				6
Total charges and program costs incurred to date					21
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Asset write-offs	1		1
Total charges and program costs incurred				5
Total charges and program costs incurred to date					$ 14