Segment, Geographical Data - Schedule of Revenues by Product Family (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting [Line Items]
Revenues	$ 221.8	$ 259.0	$ 483.0	$ 520.9
Pen Needles
Segment Reporting [Line Items]
Revenues	154.7	188.3	340.2	379.4
Syringes
Segment Reporting [Line Items]
Revenues	26.3	28.8	57.0	57.2
Safety
Segment Reporting [Line Items]
Revenues	34.3	34.2	71.6	68.4
Other
Segment Reporting [Line Items]
Revenues	4.0	3.3	7.6	6.7
Contract Manufacturing
Segment Reporting [Line Items]
Revenues	$ 2.5	$ 4.4	$ 6.6	$ 9.2

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

- Definition

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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+ Details