Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES The accompanying unaudited condensed consolidated financial statements have been prepared by Valvoline Inc. (“Valvoline” or the “Company”) in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and Securities and Exchange Commission regulations for interim financial reporting, which do not include all information and footnote disclosures normally included in annual financial statements. Therefore, these condensed consolidated financial statements should be read in conjunction with Valvoline’s Annual Report on Form 10-K for the fiscal year ended September 30, 2022. Certain prior period amounts disclosed herein have been reclassified to conform to the current presentation. Use of estimates, risks and uncertainties The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and the disclosures of contingent matters. Although management bases its estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, actual results could differ significantly from the estimates under different assumptions or conditions. Valvoline has substantially maintained its operations throughout the novel coronavirus ("COVID-19") pandemic to-date and has continued precautionary measures to protect the Company's employees and customers and manage through the currently known impacts on its business. Given the unprecedented nature of the pandemic, the extent of future impacts cannot be reasonably estimated at this time due to numerous uncertainties, including the ultimate duration and severity of the pandemic. Sale of Global Products business On March 1, 2023, Valvoline completed the previously announced sale of VGP Holdings LLC, which holds all of the issued and outstanding equity interests in the companies that, along with their respective subsidiaries, comprised the Company’s former Global Products reportable segment (“Global Products”) to Aramco Overseas Company B.V. (“Aramco” or the “Buyer”) (the “Transaction”). As a result, in all prior periods presented within these condensed consolidated financial statements, the assets and liabilities associated with the Global Products disposal group have been classified as held for sale within the Condensed Consolidated Balance Sheet and its operations have been classified as discontinued operations within the Condensed Consolidated Statements of Comprehensive Income and Cash Flows. The operating results and cash flows of the Global Products business have been reported through February 28, 2023, the date immediately prior to the closing date of the Transaction. Refer to Note 2 for additional information regarding the Global Products business, including the assets and liabilities divested and income from discontinued operations. Unless otherwise noted, disclosures within these remaining Notes to Condensed Consolidated Financial Statements relate solely to the Company's continuing operations. Inflation Reduction Act of 2022 The Inflation Reduction Act (the “IRA”) was enacted in the United States in August 2022, which includes, among other provisions, a 15% alternative minimum tax on corporate adjusted income in excess of certain thresholds for taxable years beginning after December 31, 2022. The Company does not expect this provision will have a material impact on its condensed consolidated financial statements. The IRA also imposes an excise tax of one percent on share repurchases that occur after December 31, 2022. Corporations are permitted to credit certain new stock issuances against their stock repurchases during the same taxable period. Valvoline has repurchased 35.0 million shares of its common stock for $1,302.6 million since January 1, 2023 and recognized excise taxes of $13.0 million in Retained earnings as incremental costs to complete the repurchases during the six months ended June 30, 2023. Recent accounting pronouncements The following accounting guidance relevant to Valvoline was either issued or adopted in the current year or is expected to have a meaningful impact on Valvoline in future periods upon adoption. Recently adopted In March 2020, the Financial Accounting Standards Board (“FASB”) issued guidance related to reference rate reform that simplifies the accounting for contract modifications and hedging arrangements as the market transitions from the London Interbank Offered Rate ("LIBOR") and other interbank reference rates to alternative reference rates. In December 2022, FASB issued guidance to extend the temporary transition period which now can be applied on a prospective basis through the end of December 2024 for qualifying modified arrangements. Valvoline amended its Credit Agreement, effective upon the sale of Global Products on March 1, 2023. This amendment includes the transition from LIBOR to the Secured Overnight Financing Rate (“SOFR”) or an alternate base rate, among other modifications. Refer to Note 5 for additional details. Concurrent with the amendment of the Credit Agreement, Valvoline modified its interest rate swap agreements solely to change the reference rates from LIBOR to SOFR and applied the optional expedients available under the reference rate reform accounting guidance. This modification aligns with changes to its variable rate debt under the Credit Agreement amendment. Valvoline expects these hedges to continue to effectively hedge its exposure risk to interest rates. As of June 30, 2023, Valvoline has no outstanding long-term debt or interest rate swap agreements with payments based on LIBOR.