Consolidated Statement of Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Income Statement [Abstract]
Net sales	$ 13,014	$ 13,525	$ 14,580
Cost of goods sold	8,259	8,844	9,517
Selling, general and administrative expense	3,360	3,590	4,039
Operating profit	1,395	1,091	1,024
Interest expense	406	227	209
Other income (expense), net	(62)	(91)	10
Income before income taxes	927	773	825
Income taxes	233	159	186
Earnings (loss) from unconsolidated entities	1	0	(6)
Net income	695	614	633
Net income (loss) attributable to noncontrolling interests	1	0	1
Net income attributable to Kellogg Company	$ 694	$ 614	$ 632
Basic	$ 1.98	$ 1.74	$ 1.76
Diluted	1.96	1.72	1.75
Dividends per share	$ 2.04	$ 1.98	$ 1.90