CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Dec. 31, 2022	Jan. 01, 2022
Assets, Current [Abstract]
Cash and cash equivalents	$ 299	$ 286
Accounts receivable, net	1,736	1,489
Inventories	1,768	1,398
Other current assets	383	221
Total current assets	4,186	3,394
Property, net	3,789	3,827
Operating lease, right-of-use assets	617	640
Goodwill	5,686	5,771
Other intangibles, net	2,296	2,409
Investment in unconsolidated entities	432	424
Other assets	1,490	1,713
Total assets	18,496	18,178
Liabilities, Current [Abstract]
Current maturities of long-term debt	780	712
Notes payable	467	137
Accounts payable	2,973	2,573
Current operating lease liabilities	121	116
Accrued advertising and promotion	766	714
Accrued salaries and wages	370	300
Other current liabilities	872	763
Total current liabilities	6,349	5,315
Long-term debt	5,317	6,262
Operating lease liabilities	486	502
Deferred income taxes	760	722
Pension liability	709	706
Other liabilities	500	456
Commitments and contingencies
Equity [Abstract]
Common stock, $0.25 par value, 1,000,000,000 shares authorized Issued: 421,209,894 shares in 2022 and 421,098,799 shares in 2021	105	105
Capital in excess of par value	1,068	1,023
Retained earnings	9,197	9,028
Treasury stock, at cost 79,409,966 shares in 2022 and 79,721,563 shares in 2021	(4,721)	(4,715)
Accumulated other comprehensive income (loss)	(1,708)	(1,721)
Total Kellogg Company equity	3,941	3,720
Noncontrolling interests	434	495
Total equity	4,375	4,215
Total liabilities and equity	$ 18,496	$ 18,178