Accounting Policies	3 Months Ended
Accounting Policies	Apr. 01, 2023
Accounting Policies [Abstract]
Accounting Policies	Accounting policies Basis of presentation The unaudited interim financial information of Kellogg Company (the Company) included in this report reflects all adjustments, all of which are of a normal and recurring nature, that management believes are necessary for a fair statement of the results of operations, comprehensive income, financial position, equity and cash flows for the periods presented. This interim information should be read in conjunction with the financial statements and accompanying footnotes within the Company’s 2022 Annual Report on Form 10-K. The condensed balance sheet information at December 31, 2022 was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States. The results of operations for the quarter ended April 1, 2023 are not necessarily indicative of the results to be expected for other interim periods or the full year. Accounts payable - Supplier Finance Programs The Company establishes competitive market-based terms with our suppliers, regardless of whether they participate in supplier finance programs, which generally range from 0 to 150 days dependent on their respective industry and geography. The Company has agreements with third parties to provide accounts payable tracking systems which facilitate participating suppliers’ ability to monitor and, if elected, sell payment obligations from the Company to designated third-party financial institutions. Participating suppliers may, at their sole discretion, make offers to sell one or more payment obligations of the Company prior to their scheduled due dates at a discounted price to participating financial institutions. The Company has no economic interest in the sale of these suppliers’ receivables and no direct financial relationship with the financial institutions concerning these services. The Company’s obligations to its suppliers, including amounts due and scheduled payment dates, are not impacted by suppliers’ decisions to sell amounts under the arrangements. However, the Company’s right to offset balances due from suppliers against payment obligations is restricted by the agreements for those payment obligations that have been sold by suppliers. The payment of these obligations by the Company is included in cash used in operating activities in the Consolidated Statement of Cash Flows. As of April 1, 2023, $1.1 billion of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system. As of December 31, 2022, $1.1 billion of the Company’s outstanding payment obligations had been placed in the accounts payable tracking system. Accounting standards adopted in the period Supplier Finance Programs: Disclosure of Supplier Finance Program Obligations. In September 2022, the FASB issued an ASU to improve the disclosures of supplier finance programs. Specifically, the ASU requires disclosure of key terms of the supplier finance programs and a rollforward of the related obligations. The amendments in this ASU do not affect the recognition, measurement, or financial statement presentation of obligations covered by supplier finance programs. The ASU is effective for fiscal years, and interim periods within those years, beginning after December 15, 2022, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. The Company has historically presented information regarding the nature and amount of outstanding Accounts Payable obligations confirmed into supplier finance programs within the Accounting Policies note of the financial statements. The Company adopted the ASU in the first quarter of 2023 and plans to include the rollforward information in the first quarter of 2024.