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Income Taxes Tax Jurisdictions and Years Currently under Audit Exam (Details) | 12 Months Ended
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Sep. 30, 2021
United States | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2017
United States | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2018
Belgium | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2015
Belgium | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2020
China | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2017
China | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2019
Germany | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2007
Germany | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2018
Luxembourg | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2017
Luxembourg | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2018
Mexico | Earliest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2015
Mexico | Latest Tax Year [Member] |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2020
United Kingdom | Tax Year 2014 |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2014
United Kingdom | Tax Year 2015 |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2015
United Kingdom | Tax Year 2018 |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2018
United Kingdom | Tax Year 2017 |
Income Tax Examination [Line Items] |
Tax jurisdictions and years currently under audit exam | 2017

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