CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 1,356	$ 964	$ 962
Adjustments to reconcile net income to operating cash flows
Depreciation and amortization	367	419	478
Impairment of property	60	0	0
Postretirement benefit plan expense (benefit)	(11)	53	240
Deferred income taxes	24	(21)	(46)
Stock compensation	89	95	96
Loss on Russia divestiture	0	113	0
Other	(64)	40	(42)
Postretirement benefit plan distributions	175	0	0
Postretirement benefit plan contributions	(55)	(42)	(23)
Changes in operating assets and liabilities, net of acquisitions and divestitures:
Trade receivables	(104)	(42)	(257)
Inventories	2	139	(411)
Accounts payable	38	(340)	411
All other current assets and liabilities	(117)	267	243
Net cash provided by (used in) operating activities	1,760	1,645	1,651
Investing activities
Additions to properties	(628)	(677)	(488)
Issuance of notes receivable	0	(4)	(22)
Repayments from notes receivable	0	0	10
Purchases of marketable securities	(350)	0	0
Sales of marketable securities	209	0	0
Settlement of net investment hedges	(7)	68	37
Purchases of available for sale securities	0	(15)	(17)
Sales of available for sale securities	0	64	19
Other	26	2	13
Net cash provided by (used in) investing activities	(750)	(562)	(448)
Financing activities
Net increase (reduction) of notes payable, with maturities less than or equal to 90 days	(27)	(356)	337
Issuances of notes payable, with maturities greater than 90 days	27	35	28
Reductions of notes payable, with maturities greater than 90 days	0	(25)	(35)
Issuances of long-term debt	619	404	39
Reductions of long-term debt	(655)	(780)	(648)
Net issuances of common stock	213	60	277
Common stock repurchases	0	(170)	(300)
Cash dividends	(776)	(800)	(797)
Proceeds received from debt issued and retained by WK Kellogg Co	0	663	0
Cash retained by WK Kellogg Co at separation	0	(78)	0
Other	(8)	(63)	18
Net cash provided by (used in) financing activities	(607)	(1,110)	(1,081)
Effect of exchange rate changes on cash and cash equivalents	17	2	(109)
Increase (decrease) in cash and cash equivalents	420	(25)	13
Cash and cash equivalents at beginning of period	274	299	286
Cash and cash equivalents at end of period	694	274	299
Supplemental cash flow disclosures:
Interest paid	303	291	220
Income taxes paid	244	322	312
Supplemental cash flow disclosures of non-cash investing activities:
Additions to properties included in accounts payable	$ 142	$ 138	$ 209