Consolidated Statement of Equity (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. 03, 2009	$ 1,455	$ 105	$ 438	$ 4,836	$ (1,790)	$ (2,141)	$ 1,448	$ 7	$ (168)
Balance, shares at Jan. 03, 2009		419			37
Common stock repurchases, shares	4				4
Common stock repurchases, value	(187)				(187)		(187)
Net income (loss)	1,208			1,212			1,212	(4)	1,208
Dividends	(546)			(546)			(546)
Other comprehensive income (loss)	175					175	175		175
Stock compensation	37		37				37
Stock options exercised and other, shares					(3)
Stock options exercised and other, value	133		(3)	(21)	157		133
Balance, value at Jan. 02, 2010	2,275	105	472	5,481	(1,820)	(1,966)	2,272	3	1,383
Balance, shares at Jan. 02, 2010		419			38
Common stock repurchases, shares	21				21
Common stock repurchases, value	(1,057)				(1,057)		(1,057)
Net income (loss)	1,240			1,247			1,247	(7)	1,240
Dividends	(584)			(584)			(584)
Other comprehensive income (loss)	52					52	52		52
Stock compensation	19		19				19
Stock options exercised and other, shares					(5)
Stock options exercised and other, value	209		4	(22)	227		209
Balance, value at Jan. 01, 2011	2,154	105	495	6,122	(2,650)	(1,914)	2,158	(4)	1,292
Balance, shares at Jan. 01, 2011		419			54
Common stock repurchases, shares	15				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 (loss)	(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	$ 105	$ 522	$ 6,721	$ (3,130)	$ (2,458)	$ 1,760	$ 2	$ 685
Balance, shares at Dec. 31, 2011		419			62