| Document and Entity Information | Nov. 11, 2019 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001632790 |
| Document Type | 8-K |
| Document Period End Date | Nov. 11, 2019 |
| Entity Registrant Name | Energizer Holdings, Inc. |
| Entity Incorporation State Country Code | MO |
| Entity File Number | 1-36837 |
| Entity Tax Identification Number | 36-4802442 |
| Entity Address, Address Line One | 533 Maryville University Drive |
| Entity Address, City or Town | St. Louis |
| Entity Address, State or Province | MO |
| Entity Address, Postal Zip Code | 63141 |
| City Area Code | (314) |
| Local Phone Number | 985-2000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $.01 per share |
| Trading Symbol | ENR |
| Security Exchange Name | NYSE |
| Series A Preferred Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 7.50% Series A Mandatory Convertible Preferred Stock, par value $.01 per share |
| Trading Symbol | ENR PRA |
| Security Exchange Name | NYSE |
