Consolidated Statement of Equity (Unaudited) (USD $) In Millions	Total		Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Kellogg Company Equity [Member]	Noncontrolling Interests [Member]	Total Comprehensive Income (Loss) [Member]
Balance, value at Jan. 01, 2011	$ 2,154		$ 105	$ 495	$ 6,122	$ (2,650)	$ (1,914)	$ 2,158	$ (4)
Balance, shares at Jan. 01, 2011			419			54
Common stock repurchases, shares						15
Common stock repurchases, value	(793)					(793)		(793)
Acquisition of noncontrolling interest	0			(8)				(8)	8
Net income (loss)	1,229				1,231			1,231	(2)	1,229
Dividends	(604)				(604)			(604)
Other comprehensive income	(544)						(544)	(544)		(544)
Stock compensation	26			26				26
Stock options exercised and other, shares						(7)
Stock options exercised and other, value	294			9	(28)	313		294
Balance, value at Dec. 31, 2011	1,762	[1]	105	522	6,721	(3,130)	(2,458)	1,760	2	685
Balance, shares at Dec. 31, 2011			419			62
Common stock repurchases, shares	1					1
Common stock repurchases, value	(63)					(63)		(63)
Net income (loss)	358				358			358	0	358
Dividends	(153)				(153)			(153)
Other comprehensive income	110						110	110		110
Stock compensation	10			10				10
Stock options exercised and other, shares			1			(1)
Stock options exercised and other, value	40			(2)	(9)	51		40
Balance, value at Mar. 31, 2012	$ 2,064		$ 105	$ 530	$ 6,917	$ (3,142)	$ (2,348)	$ 2,062	$ 2	$ 468
Balance, shares at Mar. 31, 2012			420			62

[1] * Condensed from audited financial statements.