Description of Business and Basis of Presentation	9 Months Ended
Description of Business and Basis of Presentation	Jun. 30, 2019
Accounting Policies [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Description of Business - Energizer Holdings, Inc. and its subsidiaries (Energizer or the Company) is a global manufacturer, marketer and distributer of household batteries, specialty batteries and portable lights under the Energizer® and Eveready® brand names. Energizer offers batteries using lithium, alkaline, carbon zinc, nickel metal hydride, zinc air and silver oxide constructions. On July 1, 2016, Energizer expanded its portfolio of brands with an acquisition of a leading designer and marketer of automotive fragrance and appearance products. The Company's brands include Refresh Your Car!®, California Scents®, Driven®, Bahama & Co.®, LEXOL® and Eagle One®. On July 2, 2018, Energizer acquired the Nu Finish® and Scratch Doctor® brands to add to its automotive appearance offerings. On January 2, 2019, Energizer expanded its battery portfolio with the acquisitions of Spectrum Holdings, Inc.’s (Spectrum) global battery, lighting, and portable power business (Battery Acquisition). The Battery Acquisition included the Rayovac® and Varta® brands (Acquired Battery Business). On January 28, 2019, Energizer further expanded its auto care portfolio with the acquisitions of Spectrum's global auto care business (Auto Care Acquisition). The Auto Care Acquisition included the Armor All®, STP®, and A/C PRO® brands (Acquired Auto Care Business). On May 29, 2019, the Company entered into a definitive Acquisition Agreement (the “Acquisition Agreement”) with VARTA Aktiengesellschaft (VARTA AG) to divest the Varta® consumer battery business in the Europe, Middle East and Africa regions, including manufacturing and distribution facilities in Germany (Divestment Business). The Company will sell the Divestment Business for an aggregate purchase price of €180.0, subject to purchase price adjustments (Varta Divestiture). Pursuant to the terms of the acquisition agreement with Spectrum for the Battery Acquisition, Spectrum will be contributing an additional $200.0 to Energizer in connection with the divestiture. Basis of Presentation - The accompanying Consolidated (Condensed) Financial Statements include the accounts of Energizer and its subsidiaries. All significant intercompany transactions are eliminated. Energizer has no material equity method investments, variable interests or non-controlling interests. The accompanying Consolidated (Condensed) Financial Statements have been prepared in accordance with Article 10 of Regulation S-X and do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. The year-end Consolidated (Condensed) Balance Sheet was derived from the audited financial statements included in Energizer's Report on Form 10-K, but does not include all disclosures required by U.S. GAAP. In the opinion of management, all adjustments, consisting of normal recurring adjustments, considered necessary for a fair statement of our operations, financial position and cash flows have been included. Certain reclassifications have been made to the prior year financial statements to conform to the current presentation. Operating results for any quarter are not necessarily indicative of the results for any other quarter or for the full year. These statements should be read in conjunction with the financial statements and notes thereto for Energizer for the year ended September 30, 2018 included in the Annual Report on Form 10-K dated November 16, 2018. On January 2, 2019, the Company completed the Battery Acquisition. The European Commission approved the acquisition conditioned on the divestiture of the Divestment Business. On May 29, 2019, the Company signed a definitive agreement for the sale of the Divestment Business to VARTA AG and expects to complete this divestiture by the end of calendar year 2019, subject to customary closing conditions. As a result, the assets and liabilities associated with the Divestment Business have been classified as held for sale in the accompanying Consolidated (Condensed) Balance Sheets and the respective operations of the Divestment Business have been classified as discontinued operations in the accompanying Consolidated (Condensed) Statements of Earnings and Comprehensive Income and Statements of Cash Flows. See Note 4 - Divestment for more information on the assets and liabilities classified as held for sale and discontinued operations. Recently Adopted Accounting Pronouncements - In the prior quarter, the Company early adopted ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities, on a modified retrospective basis effective October 1, 2018. This update simplifies hedge accounting and decreases complexity for both the preparation and understanding of hedging disclosures in the financial statements. Upon adoption, the Company reclassified $4.8 of hedging settlement gains for the six months ended March 31, 2019 from Other items, net and into Cost of products sold. The gains were related to our currency hedges on payment of inventory purchases and will now be recorded in Cost of products sold to align with the new guidance. The Company recorded gains of $6.7 related to these hedging programs during the nine months ended June 30, 2019. The Company also began a zinc hedging program in the second quarter. See additional discussion in Note 13, Financial Instruments and Risk Management. Effective October 1, 2018, the Company adopted ASU 2014-09, Revenue from Contracts with Customers, on a modified retrospective basis for all contracts as of the effective date. This guidance provides a single comprehensive revenue recognition model for all contracts with customers to improve comparability within industries, across industries and across capital markets. There was no material impact to retained earnings as a result of the adoption. See Note 2, Revenue Recognition, for additional discussion. Effective October 1, 2018, the Company early adopted ASU 2018-15, Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. This update requires implementation costs incurred by customers in cloud computing arrangements to be deferred and recognized over the term of the arrangement similar to internal-use software guidance. The Company will defer and recognize allowable implementation costs for future projects. Capitalized implementation costs were not material for the quarter and nine months ended June 30, 2019. Effective October 1, 2018, the Company adopted ASU 2016-15, Statement of Cash Flows- Classification of Certain Cash Receipts and Cash Payments, which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. The Company has determined that this new guidance has no immediate impact on the Company's consolidated financial position, results of operations or cash flows. Recently Issued Accounting Pronouncements - On February 25, 2016, the FASB issued ASU 2016-02, Leases. This update aligns the measurement of leases under GAAP more closely with International Financial Reporting Standards by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The amendments in this update will be effective for Energizer beginning October 1, 2019. Energizer is in the process of evaluating the impact the guidance will have on its financial statements.