Exit or Disposal Activities (Narrative) (Details) (COGS and SGA Programs [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	39 Months Ended					3 Months Ended	39 Months Ended
	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2012 U.S. Morning Foods and Kashi [Member]	Mar. 31, 2012 U.S. Snacks [Member]	Mar. 31, 2012 U.S. Specialty [Member]	Mar. 31, 2012 North America Other [Member]	Apr. 02, 2011 Europe [Member]	Mar. 31, 2012 Europe [Member]	Mar. 31, 2012 Asia Pacific [Member]	Mar. 31, 2012 Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 45					$ 4
Other cash costs		23
Asset write-offs		4					1
Pension costs		20
Total charges and program costs incurred	1						5
Additional expected program costs	5
Total charges and program costs incurred to date		$ 92	$ 10	$ 33	$ 2	$ 3		$ 39	$ 4	$ 1