Consolidated Balance Sheet Statement - USD ($) $ in Millions	Jan. 01, 2022	Jan. 02, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 286	$ 435
Accounts receivable, net	1,489	1,537
Inventories	1,398	1,284
Other current assets	221	226
Total current assets	3,394	3,482
Property, net	3,827	3,713
Operating lease, right-of-use assets	640	658
Goodwill	5,771	5,799
Other intangibles, net	2,409	2,491
Investment in unconsolidated entities	424	391
Other assets	1,713	1,462
Total assets	18,178	17,996
Liabilities, Current [Abstract]
Current maturities of long-term debt	712	627
Notes payable	137	102
Accounts payable	2,573	2,471
Current operating lease liabilities	116	117
Accrued advertising and promotion	714	776
Accrued salaries and wages	300	378
Other current liabilities	763	767
Total current liabilities	5,315	5,238
Long-term debt	6,262	6,746
Operating lease liabilities	502	520
Deferred income taxes	722	562
Pension liability	706	769
Other liabilities	456	525
Commitments and contingencies
Equity [Abstract]
Common stock, $0.25 par value, 1,000,000,000 shares authorized Issued: 421,098,799 shares in 2021 and 420,962,092 shares in 2020	105	105
Capital in excess of par value	1,023	972
Retained earnings	9,028	8,326
Treasury stock, at cost 79,721,563 shares in 2021 and 77,071,554 shares in 2020	(4,715)	(4,559)
Accumulated other comprehensive income (loss)	(1,721)	(1,732)
Total Kellogg Company equity	3,720	3,112
Noncontrolling interests	495	524
Total equity	4,215	3,636
Total liabilities and equity	$ 18,178	$ 17,996