Income Taxes (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
	Oct. 07, 2022	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023
Income Tax Contingency [Line Items]
Effective tax rate		5.00%	6.30%
Income tax expense (benefit)		$ (70.0)	$ 42.8
Income tax (benefit) expense		(209.0)	169.3
Unrecognized tax benefits		300.5
UTB that would impact effective tax rate		264.1
Income tax penalties and interest expense	$ 110.0
Income tax examination, liability (refund) adjustment from settlement with taxing authority				$ 315.0
Income Tax Contingency | Tax Year 2018
Income Tax Contingency [Line Items]
Damages sought	$ 284.0
UNITED KINGDOM
Income Tax Contingency [Line Items]
Foreign exchange (loss) gains		$ (308.2)	$ 163.9
Effective income tax rate reconciliation, foreign currency translation, percent		22.10%	24.20%
Effective income tax rate reconciliation, foreign income tax rate differential, amount		$ 132.6
Effective income tax rate reconciliation, foreign income tax rate differential, percent		9.50%
U.K. And Netherlands
Income Tax Contingency [Line Items]
Non-deductible net losses from investments		$ 43.3
Non-deductible net losses from investments, percent		3.20%
LUXEMBOURG
Income Tax Contingency [Line Items]
Valuation allowances		$ 86.0
Valuation allowances, percent		6.20%
Netherlands and Belgium
Income Tax Contingency [Line Items]
Valuation allowances			$ 27.5
Valuation allowances, percent			4.10%