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Financial risk management (Tables)
12 Months Ended
Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Foreign Currency Sensitivity The following table details our sensitivity to a 10.0% strengthening of foreign currencies against the euro. The
sensitivity analysis includes foreign currency denominated monetary items outstanding and adjusts their translation at
the period end for a 10.0% strengthening in foreign currency rates. A positive amount indicates an increase in net
income or equity.
Year ended December 31 (€, in millions)
2022
2023
Impact on net
income
Impact on
equity
Impact on net
income
Impact on 
equity
US dollar
(7.2)
65.3
4.2
78.3
Japanese yen
(0.1)
(16.6)
(2.6)
(3.8)
Taiwanese dollar
(12.8)
0.4
Other currencies
(1.3)
(10.0)
Total
(21.4)
48.7
(8.0)
74.5
Schedule of Interest Rate Sensitivity The sensitivity analysis below has been determined based on the exposure to interest rates for both derivative
financial and non-derivative financial instruments at the balance sheet date with the stipulated change taking place at
the beginning of the financial year and held constant throughout the reporting period. The table below shows the
effect of a 1.0% increase in interest rates on our net income and equity. A positive amount indicates an increase in
net income and equity.
Year ended December 31 (€, in millions)
2022
2023
Impact on net
income
Impact on
equity
Impact on net
income
Impact on
equity
Effect of a 1.0% increase in interest rates
43.8
37.6
Summary of Notional Amounts and Estimated Fair Values of Financial Instruments The following table summarizes the notional amounts and estimated fair values of our derivative financial instruments:
Year ended December 31 (€, in millions)
2022
2023
Notional
amount
Fair Value
Notional
amount
Fair Value
Forward foreign exchange contracts
158.5
(18.8)
281.1
(6.8)
Interest rate swaps
3,000.0
(225.1)
3,250.0
(118.8)
Derivative Financial Instruments Per Category The following table summarizes our derivative financial instruments per category:
Year ended December 31 (€, in millions)
2022
2023
Assets
Liabilities
Assets
Liabilities
Interest rate swaps — fair value hedges
1.7
226.8
11.3
130.1
Forward foreign exchange contracts — cash flow
hedges
3.0
18.1
2.9
10.4
Forward foreign exchange contracts — no hedge
accounting
12.6
16.3
16.9
16.2
Total
17.3
261.2
31.1
156.7
Less non-current portion:
Interest rate swaps — fair value hedges
179.0
11.3
62.7
Total non-current portion
179.0
11.3
62.7
Total current portion
17.3
82.2
19.8
94.0
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis The following tables present our financial assets and financial liabilities that are measured at fair value on a recurring
basis:
Year ended December 31, 2023 (€, in millions)
Level 1
Level 2
Level 3
Total
Assets measured at fair value
Derivative financial instruments1
31.1
31.1
Money market funds2
3,167.4
3,167.4
Short-term investments3
5.4
5.4
Total
3,167.4
36.5
3,203.9
Liabilities measured at fair value
Derivative financial instruments1
156.7
156.7
Assets and Liabilities for which fair values are disclosed
Loan receivable
776.1
776.1
Long-term debt4
4,496.2
4,496.2
Year ended December 31, 2022 (€, in millions)
Level 1
Level 2
Level 3
Total
Assets measured at fair value
Derivative financial instruments1
17.3
17.3
Money market funds2
3,196.7
3,196.7
Short-term investments3
107.7
107.7
Total
3,196.7
125.0
3,321.7
Liabilities measured at fair value
Derivative financial instruments1
261.2
261.2
Assets and Liabilities for which fair values are disclosed
Loan receivable
307.9
307.9
Long-term debt4 
4,072.8
4,072.8
1.Derivative financial instruments consist of forward foreign exchange contracts and interest rate swaps.
2.Money market funds are part of our cash and cash equivalents.
3.Short-term investments consist of deposits with original maturities to the entity holding the investments longer than three months, but one year
or less at the date of acquisition. These deposits are valued at amortized costs which is close to their fair value. Their fair value is determined
with reference to quoted market prices in an active market for similar assets or discounted cash flow analysis.
4.Long-term debt mainly relates to Eurobonds.