Basis of Presentation (Notes)	6 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BACKGROUND AND BASIS OF PRESENTATION BellRing Brands, Inc. is a consumer products holding company operating in the global convenient nutrition category and is a provider of ready-to-drink (“RTD”) protein shakes and powders. The Company has a single operating and reportable segment, with its principal products being protein-based consumer goods. The Company’s primary brands are Premier Protein and Dymatize. Unless otherwise stated or the context otherwise indicates, all references in these financial statements and notes to “BellRing,” the “Company,” “us,” “our” or “we” mean BellRing Brands, Inc. and its subsidiaries. These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), under the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (the “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended September 30, 2024. These unaudited condensed consolidated financial statements should be read in conjunction with such audited consolidated financial statements, which are included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2024, filed with the SEC on November 19, 2024. These unaudited condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments and accruals) that management considers necessary for a fair statement of the Company’s results of operations, comprehensive income, financial position, cash flows and stockholders’ equity for the interim periods presented. Interim results are not necessarily indicative of the results for any other interim period or for the entire fiscal year. Certain reclassifications have been made to previously reported financial information to conform to the current year presentation.

BellRing Brands, Inc. is a consumer products holding company operating in the global convenient nutrition category and is a provider of ready-to-drink (“RTD”) protein shakes and powders. The Company has a single operating and reportable segment, with its principal products being protein-based consumer goods. The Company’s primary brands are Premier Protein and Dymatize.

Unless otherwise stated or the context otherwise indicates, all references in these financial statements and notes to “BellRing,” the “Company,” “us,” “our” or “we” mean BellRing Brands, Inc. and its subsidiaries.

These unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”), under the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (the “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended September 30, 2024. These unaudited condensed consolidated financial statements should be read in conjunction with such audited consolidated financial statements, which are included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2024, filed with the SEC on November 19, 2024.

These unaudited condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments and accruals) that management considers necessary for a fair statement of the Company’s results of operations, comprehensive income, financial position, cash flows and stockholders’ equity for the interim periods presented. Interim results are not necessarily indicative of the results for any other interim period or for the entire fiscal year. Certain reclassifications have been made to previously reported financial information to conform to the current year presentation.