Goodwill and intangible assets - Schedule of Goodwill (Details) € in Millions, $ in Millions |
9 Months Ended | ||
|---|---|---|---|
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Jun. 30, 2025
USD ($)
|
Jun. 30, 2025
EUR (€)
|
Jun. 30, 2024
USD ($)
|
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| Goodwill [Roll Forward] | |||
| Beginning balance | $ 1,046.0 | ||
| Cumulative translation adjustment | 4.0 | ||
| Ending balance | 1,050.1 | ||
| Centralsul Ltda. | |||
| Goodwill [Roll Forward] | |||
| Goodwill acquired | € | € 0.1 | ||
| Batteries & Lights | |||
| Goodwill [Roll Forward] | |||
| Beginning balance | 897.9 | ||
| Cumulative translation adjustment | $ 3.9 | ||
| Ending balance | 901.8 | ||
| Batteries & Lights | Centralsul Ltda. | |||
| Goodwill [Roll Forward] | |||
| Goodwill acquired | 0.0 | ||
| Auto Care | |||
| Goodwill [Roll Forward] | |||
| Beginning balance | 148.1 | ||
| Cumulative translation adjustment | 0.1 | ||
| Ending balance | $ 148.3 | ||
| Auto Care | Centralsul Ltda. | |||
| Goodwill [Roll Forward] | |||
| Goodwill acquired | € | € 0.1 | ||
| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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