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Income Taxes (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended
	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Feb. 29, 2024 USD ($)	Feb. 29, 2024 EUR (€)
Effective Income Tax Rate Reconciliation [Line Items]
Discreet income tax benefit		$ 6.6	$ 43.8
Income Tax Expense (Benefit) Excluding Discrete Items		19.5	16.2
Income tax benefit		$ 12.9	$ (27.6)
Luxembourg subsidiaries
Effective Income Tax Rate Reconciliation [Line Items]
Liability for Uncertainty in Income Taxes, Noncurrent				$ 63.0	€ 60.0
Luxembourg subsidiaries | Forecast
Effective Income Tax Rate Reconciliation [Line Items]
Income tax benefit	$ (63.0)

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