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Financial Assets and Financial Liabilities - Summary of Financial Assets and Liabilities at Amortized Cost and at Fair Value (Details) - EUR (€) € in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative Liabilities | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	€ 0.4
Derivative Liabilities | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | FVTPL | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.4
Derivative Liabilities | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 1 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0
Derivative Liabilities | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 2 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.4
Derivative Liabilities | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 3 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0
Contingent consideration | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	38.8	€ 6.1
Contingent consideration | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | FVTPL | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	38.8	6.1
Contingent consideration | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 1 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Contingent consideration | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 2 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Contingent consideration | Financial Liabilities at Fair Value Through Other Comprehensive Income, Category | Level 3 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	38.8	6.1
Lease liabilities | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	216.7	210.1
Lease liabilities | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	216.7	210.1
Lease liabilities | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Lease liabilities | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Lease liabilities | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Loans and borrowings | Financial liabilities at amortised cost, category | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	2.3	2.1
Loans and borrowings | Financial liabilities at amortised cost, category | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	2.3	2.1
Loans and borrowings | Financial liabilities at amortised cost, category | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Loans and borrowings | Financial liabilities at amortised cost, category | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Loans and borrowings | Financial liabilities at amortised cost, category | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Trade payables and other payables | Financial liabilities at amortised cost, category | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	354.0	204.1
Trade payables and other payables | Financial liabilities at amortised cost, category | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	354.0	204.1
Trade payables and other payables | Financial liabilities at amortised cost, category | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Trade payables and other payables | Financial liabilities at amortised cost, category | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Trade payables and other payables | Financial liabilities at amortised cost, category | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Other financial liabilities | Financial liabilities at amortised cost, category | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	414.9	785.1
Other financial liabilities | Financial liabilities at amortised cost, category | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	414.9	785.1
Other financial liabilities | Financial liabilities at amortised cost, category | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Other financial liabilities | Financial liabilities at amortised cost, category | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Other financial liabilities | Financial liabilities at amortised cost, category | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial liabilities	0.0	0.0
Financial assets at fair value through other comprehensive income, category | Foreign exchange forward contracts | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets		183.7
Financial assets at fair value through other comprehensive income, category | Foreign exchange forward contracts | FVTPL | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets		183.7
Financial assets at fair value through other comprehensive income, category | Foreign exchange forward contracts | Level 1 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets		0.0
Financial assets at fair value through other comprehensive income, category | Foreign exchange forward contracts | Level 2 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets		183.7
Financial assets at fair value through other comprehensive income, category | Foreign exchange forward contracts | Level 3 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets		0.0
Financial assets at fair value through other comprehensive income, category | Money market funds | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	7,446.1	3,148.9
Financial assets at fair value through other comprehensive income, category | Money market funds | FVTPL | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	7,446.1	3,148.9
Financial assets at fair value through other comprehensive income, category | Money market funds | Level 1 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	7,446.1	3,148.9
Financial assets at fair value through other comprehensive income, category | Money market funds | Level 2 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at fair value through other comprehensive income, category | Money market funds | Level 3 (Fair value) | FVTPL
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at fair value through other comprehensive income, category | Non-listed equity investments | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	27.1	57.1
Financial assets at fair value through other comprehensive income, category | Non-listed equity investments | FVTOCI | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	27.1	57.1
Financial assets at fair value through other comprehensive income, category | Non-listed equity investments | Level 1 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at fair value through other comprehensive income, category | Non-listed equity investments | Level 2 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	57.1
Financial assets at fair value through other comprehensive income, category | Non-listed equity investments | Level 3 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	27.1	0.0
Financial assets at fair value through other comprehensive income, category | Listed equity investments | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	26.0	20.0
Financial assets at fair value through other comprehensive income, category | Listed equity investments | FVTOCI | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	26.0	20.0
Financial assets at fair value through other comprehensive income, category | Listed equity investments | Level 1 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	26.0	20.0
Financial assets at fair value through other comprehensive income, category | Listed equity investments | Level 2 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at fair value through other comprehensive income, category | Listed equity investments | Level 3 (Fair value) | FVTOCI
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Trade and other receivables | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	2,155.7	7,145.6
Financial assets at amortised cost, category | Trade and other receivables | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	2,155.7	7,145.6
Financial assets at amortised cost, category | Trade and other receivables | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Trade and other receivables | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Trade and other receivables | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Security investments | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	5,989.7
Financial assets at amortised cost, category | Security investments | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	5,989.7
Financial assets at amortised cost, category | Security investments | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Security investments | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Security investments | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Other financial assets | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	18.6	8.8
Financial assets at amortised cost, category | Other financial assets | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	18.6	8.8
Financial assets at amortised cost, category | Other financial assets | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Other financial assets | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Other financial assets | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Bank deposits | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	2,589.5	9,401.0
Financial assets at amortised cost, category | Bank deposits | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	2,589.5	9,401.0
Financial assets at amortised cost, category | Bank deposits | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Bank deposits | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Bank deposits | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Reverse Repo | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	1,175.0
Financial assets at amortised cost, category | Reverse Repo | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	1,175.0
Financial assets at amortised cost, category | Reverse Repo | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Reverse Repo | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Reverse Repo | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0
Financial assets at amortised cost, category | Cash at banks and on hand | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	453.1	1,325.2
Financial assets at amortised cost, category | Cash at banks and on hand | AC | Carrying amount
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	453.1	1,325.2
Financial assets at amortised cost, category | Cash at banks and on hand | Level 1 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Cash at banks and on hand | Level 2 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	0.0	0.0
Financial assets at amortised cost, category | Cash at banks and on hand | Level 3 (Fair value) | AC
Disclosure Of Financial Assets And Liabilities [Line Items]
Financial assets	€ 0.0	€ 0.0

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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