Foreign Exchange Gain (Loss) - Summary of Foreign Exchange Gain (Loss) (Details) - EUR (€) € in Thousands	3 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Foreign exchange gain (loss) [abstract]
Foreign exchange gain (loss)	€ (11,655)	€ (30,830)

The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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