Fair Value of Financial Instruments - Other Investments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Other Equity Method Investments
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Equity contributions			$ 0.2	$ 0.2
Distributions			1.9
Subcontracting Arrangements | Related Party
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Operating costs and expenses	$ 1.9	$ 0.6	4.2	2.1
Accounts payable	0.5		0.5		$ 0.1
Accounts receivable, after allowance for credit loss	0.6		0.6		0.4
Advanced Receivable Arrangement
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Operating costs and expenses			0.1	$ 0.7
Employee Leasing and Advanced Receivable Arrangement | Related Party
Fair Value, Financial Instruments Measured on a Non-Recurring Basis [Line Items]
Accounts receivable, after allowance for credit loss	$ 4.2		$ 4.2		$ 4.0