CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Dec. 28, 2024	Dec. 30, 2023
Assets, Current [Abstract]
Cash and cash equivalents	$ 694	$ 274
Accounts receivable, net	1,522	1,568
Inventories	1,165	1,243
Other current assets	373	245
Total current assets	3,754	3,330
Property, net	3,234	3,212
Operating lease, right-of-use assets	601	661
Goodwill	5,003	5,160
Other intangibles, net	1,760	1,930
Investment in unconsolidated entities	99	184
Other assets	1,177	1,144
Total assets	15,628	15,621
Liabilities, Current [Abstract]
Current maturities of long-term debt	632	663
Notes payable	113	121
Accounts payable	2,236	2,314
Current operating lease liabilities	134	121
Accrued advertising and promotion	611	766
Accrued salaries and wages	259	278
Other current liabilities	675	797
Total current liabilities	4,660	5,060
Long-term debt	4,998	5,089
Operating lease liabilities	465	532
Deferred income taxes	541	497
Pension liability	599	613
Other liabilities	483	461
Commitments and contingencies (Note 17)
Equity [Abstract]
Common stock, $0.25 par value, 1,000,000,000 shares authorized Issued: 421,389,221 shares in 2024 and 421,326,361 shares in 2023	105	105
Capital in excess of par value	1,121	1,101
Retained earnings	9,358	8,804
Treasury stock, at cost 76,280,394 shares in 2024 and 80,738,167 shares in 2023	(4,533)	(4,794)
Accumulated other comprehensive income (loss)	(2,276)	(2,041)
Total Kellanova equity	3,775	3,175
Noncontrolling interests	107	194
Total equity	3,882	3,369
Total liabilities and equity	$ 15,628	$ 15,621