Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Revenue Recognition - Schedule of Product and Market Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Net Sales by products	$ 734.1	$ 725.3	$ 2,156.3	$ 2,119.9
Modern Markets
Disaggregation of Revenue [Line Items]
Net Sales by products	109.4	111.3	388.6	356.3
Developing Markets
Disaggregation of Revenue [Line Items]
Net Sales by products	80.1	80.0	248.4	245.0
Distributors Markets
Disaggregation of Revenue [Line Items]
Net Sales by products	48.7	53.9	176.6	137.1
Global Professional Markets
Disaggregation of Revenue [Line Items]
Net Sales by products	70.0	71.8	205.0	209.5
North America Market
Disaggregation of Revenue [Line Items]
Net Sales by products	425.9	408.3	1,137.7	1,172.0
Batteries
Disaggregation of Revenue [Line Items]
Net Sales by products	506.3	515.9	1,628.4	1,592.9
Auto Care
Disaggregation of Revenue [Line Items]
Net Sales by products	209.9	190.2	473.7	464.4
Lights
Disaggregation of Revenue [Line Items]
Net Sales by products	$ 17.9	$ 19.2	$ 54.2	$ 62.6