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3. Fair Value Investments (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) shares		Dec. 31, 2022 EUR (€) shares	Dec. 31, 2021 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount	$ 6.5
Interest Receivable, Current	11.6			$ 2.2
Equity Method Investments	26.7			29.9
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial Instruments, Owned, Principal Investments, at Fair Value	(322.6)	[1]	€ (400.0)	(443.1)	[1]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	100.6	[1]
Foreign Currency Transaction Gain (Loss), Realized	(19.9)	[1]
Fair Value, Recurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial Instruments, Owned, Principal Investments, at Fair Value	$ (322.6)	[1]		(443.1)	[1]
Ordinary voting shares [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment ownership percentage	37.00%		37.00%
Investment Owned, Balance, Shares | shares	12,987,900		12,987,900
Preference shares [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment ownership percentage	28.00%		28.00%
Investment Owned, Balance, Shares | shares	9,588,908		9,588,908
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financial Instruments, Owned, Principal Investments, at Fair Value	$ 0.0	[1]		$ 0.0	[1]
[1] The Loan under the fair value option is included in Other investments in the consolidated balance sheets.

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Investment ownership percentage

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of investment in equity security without readily determinable fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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Balance held at close of period in number of shares.

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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