Other assets - Narrative (Detail) - EUR (€) € in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Assets [Abstract]
Prepaid income taxes on intercompany profit, not realized, current	€ 324.5	€ 515.3

Prepaid Income Taxes On Intercompany Profit, Not Realized, Current

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant