Consolidated Statement of Income (unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Income Statement [Abstract]
Net sales	$ 4,053	$ 3,672
Cost of goods sold	2,843	2,513
Selling, general and administrative expense	770	642
Operating profit	440	517
Interest expense	80	56
Other income (expense), net	26	74
Income before income taxes	386	535
Income tax expense (benefit)	86	112
Earnings (loss) from unconsolidated entities	2	1
Net income	302	424
Net income attributable to noncontrolling interests	4	2
Net income attributable to Kellogg Company	$ 298	$ 422
Per share amounts:
Basic earnings (in dollars per share)	$ 0.87	$ 1.24
Diluted earnings (in dollars per share)	$ 0.86	$ 1.23
Average shares outstanding:
Basic (in shares)	342,000	340,000
Diluted (in shares)	345,000	342,000
Actual shares outstanding at period end (in shares)	343,000	338,000