Earnings Per Share - Schedule of Calculation of Earnings Per Share (Details) - EUR (€) € / shares in Units, € in Thousands	5 Months Ended	12 Months Ended
Sep. 30, 2021	Sep. 30, 2023	Sep. 30, 2022
Earnings per share [abstract]
Weighted number of outstanding shares	182,721,369	182,721,369	182,721,369
Weighted number of outstanding shares (diluted and undiluted)	182,721,369	182,721,369	182,721,369
Profit (loss) attributable to ordinary shareholders	€ (17,205)	€ 75,022	€ 187,111
Basic	€ (0.09)	€ 0.41	€ 1.02
Diluted	€ (0.09)	€ 0.41	€ 1.02

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

+ References

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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