Finance income and costs (Details) - EUR (€) € in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Analysis of income and expense [abstract]
Interest income	€ 2.3	€ 1.7	€ 4.1	€ 4.4
Gain (loss) on hedge ineffectiveness	4.1	0.0	6.8	0.0
Net foreign exchange gains on translation of financial assets and financial liabilities	2.8	4.9	7.4	12.7
Finance income	9.2	6.6	18.3	17.1
Interest expense (a)	(32.9)	(26.7)	(89.1)	(82.3)
Net pension interest costs	(0.8)	(1.3)	(3.0)	(3.7)
Amortization of debt discounts and borrowing costs	(0.4)	(1.8)	(1.0)	(5.3)
Financing costs incurred on new or amended debt (b)	(7.6)	0.0	(7.6)	0.0
Finance costs	(41.7)	(29.8)	(100.7)	(91.3)
Net financing costs	€ (32.5)	€ (23.2)	(82.4)	€ (74.2)
Gains (Losses) on Restructuring of previous debt			€ (23.8)

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The gain (loss) on hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

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The amount of expense arising from interest.

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The amount of income arising from interest.

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