Exit or Disposal Activities (Exit Costs Incurred by Reportable Segments for COGS and SGA Programs) (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
Total			$ 65
COGS Program [Member]
Total			40
COGS Program [Member] | U.S. Morning Foods and Kashi [Member]
Total			4
COGS Program [Member] | U.S. Snacks [Member]
Total			9
COGS Program [Member] | North America Other [Member]
Total			1
COGS Program [Member] | Europe [Member]
Total	10	4	16
COGS Program [Member] | Asia Pacific [Member]
Total			1
COGS Program [Member] | Latin America [Member]
Total			9
COGS and SGA Programs [Member]
Total	24	19	49	92
COGS and SGA Programs [Member] | U.S. Morning Foods and Kashi [Member]
Total				10
COGS and SGA Programs [Member] | U.S. Snacks [Member]
Total				33
COGS and SGA Programs [Member] | U.S. Specialty [Member]
Total				2
COGS and SGA Programs [Member] | North America Other [Member]
Total				3
COGS and SGA Programs [Member] | Europe [Member]
Total				39
COGS and SGA Programs [Member] | Asia Pacific [Member]
Total				4
COGS and SGA Programs [Member] | Latin America [Member]
Total				$ 1