Income Taxes - Summary of Major Tax Jurisdiction (Details)	12 Months Ended
	Sep. 30, 2023
United States
Income Tax Examination [Line Items]
Open Years	2020 2021 2022 2023
Germany
Income Tax Examination [Line Items]
Open Years	2015 2016 2017 2018 2019 2020 2021 2022 2023
France
Income Tax Examination [Line Items]
Open Years	2020 2021 2022 2023
Japan
Income Tax Examination [Line Items]
Open Years	2018 2019 2020 2021 2022 2023
Ireland
Income Tax Examination [Line Items]
Open Years	2019 2020 2021 2022 2023