Statement of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common stock	Capital in excess of par value	Retained earnings	Treasury stock	Accumulated other comprehensive income (loss)	Total Kellogg Company equity	Non- controlling interests	Total comprehensive income (loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 28, 2013	$ 3,607							$ 62	$ 1,818
Balance, in shares at Dec. 28, 2013		420			57
Balance at Dec. 28, 2013		$ 105	$ 626	$ 6,749	$ (2,999)	$ (936)	$ 3,545
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (690)				$ (690)		(690)
Common stock repurchases (in shares)	11				11
Net income (loss)	$ 633			632			632	1	633
Dividends	(681)			(680)			(680)	(1)
Other comprehensive income (loss)	(277)					(277)	(277)		(277)
Stock compensation	29		29				29
Stock options exercised and other	230		23	(12)	$ 219		230
Stock options exercised and other (in shares)					(4)
Balance, in shares at Jan. 03, 2015		420			64
Balance at Jan. 03, 2015		$ 105	678	6,689	$ (3,470)	(1,213)	2,789
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jan. 03, 2015	2,851							62	356
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (731)				$ (731)		(731)
Common stock repurchases (in shares)	11				11
Net income (loss)	$ 614			614			614		614
Acquisition of noncontrolling interest	7						0	7
VIE deconsolidation	(58)						0	(58)
Dividends	(700)			(700)			(700)
Other comprehensive income (loss)	(164)					(163)	(163)	(1)	(164)
Stock compensation	51		51				51
Stock options exercised and other	268		16	(6)	$ 258		268
Stock options exercised and other (in shares)					(5)
Balance, in shares at Jan. 02, 2016		420			70
Balance at Jan. 02, 2016	2,128	$ 105	745	6,597	$ (3,943)	(1,376)	2,128
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jan. 02, 2016	2,138							10	450
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchases	$ (426)				$ (426)		(426)
Common stock repurchases (in shares)	6				6
Net income (loss)	$ 695			694			694	1	695
Acquisition of noncontrolling interest	5						0	5
Dividends	(716)			(716)			(716)
Other comprehensive income (loss)	(199)					(199)	(199)	0	(199)
Stock compensation	63		63				63
Stock options exercised and other	366		(2)	(4)	$ 372		366
Stock options exercised and other (in shares)					(7)
Balance, in shares at Dec. 31, 2016		420			69
Balance at Dec. 31, 2016	1,910	$ 105	$ 806	$ 6,571	$ (3,997)	$ (1,575)	$ 1,910
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2016	$ 1,926							$ 16	$ 496