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Employee benefits - Pension and Retirement Expenses (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Compensation Related Costs [Abstract]
Pension plan based on multi-employer union plan	€ 244.4	€ 181.2	€ 161.7
Pension plans based on defined contribution and other plans	104.5	74.7	67.5
Pension and retirement expenses	€ 348.9	€ 255.9	€ 229.2

X

- Definition

Multi-Employer Plan Cost

+ References

No definition available.

+ Details

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X

- Definition

Multiemployer Plan And Defined Contribution Costs, Employer Contribution, Cost

+ References

No definition available.

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- References

No definition available.

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480794/715-70-50-1

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