Income Taxes - Income Tax Reconciliation (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2025	Dec. 31, 2024		Dec. 31, 2023
Income Tax [Line Items]
French business tax, gross		$ 11.8	$ 11.7		$ 16.4
Tax provision at the U.S. federal statutory rate, Percentage		21.00%	21.00%		21.00%
Repatriation of non-United States earnings			$ (5.8)		$ 4.6
Change in valuation allowance		$ (0.7)	34.1	[1]	53.5	[1]
Provision for income taxes		106.7	111.7		117.1
Recognition of tax benefit	$ 10.8				10.8
Germany
Income Tax [Line Items]
Change in valuation allowance			16.1		46.3
French Business Tax
Income Tax [Line Items]
Statutory income tax rate differential		$ 9.3	$ 9.2	[2]	$ 13.0	[2]

[1] Losses incurred in 2024 and 2023 in Germany resulted in an increase in valuation allowance of $16.1 and $46.3, respectively.

[2] The French business tax is allowed as a deduction for French income tax purposes. The gross amount of the French business tax was $11.7, and $16.4 for 2024 and 2023 respectively. The $9.2 and $13.0 for 2024 and 2023, respectively, represent the French business tax expense net of the French tax benefit using the United States federal rate of 21%.