Debt - FLSO Term Loan Facility (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
	Mar. 12, 2024	Apr. 26, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Principal balance			$ 2,499.3		$ 2,499.3		$ 2,449.4
Repayment of debt					143.4	$ 138.5
Gain on debt extinguishment, net of debt modification costs			$ 0.0	$ 18.0	$ 0.0	147.2
Term loan facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate floor		0.75%
FLSO Term Loan Facility | Term loan facility
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,687.2
Debt instrument, basis spread on variable rate floor	0.75%
Debt instrument, basis spread on variable rate	2.75%
Effective interest rate			7.04%		7.04%		7.35%
Quarterly principal payment			$ 4.2
Principal balance			1,614.2		$ 1,614.2		$ 1,626.8
Principal amount repurchased and surrendered for cancellation				24.1		43.4
Repayment of debt				11.2		20.6
Gain on debt extinguishment, net of debt modification costs				18.0		32.1
Write-off of associated unamortized deferred financing fees				$ 4.9		$ 9.0
Fair value of debt			722.4		722.4
FLSO Term Loan Facility | Term loan facility | Apollo Global Management Inc | Affiliated entity
Debt Instrument [Line Items]
Principal balance			$ 79.9		$ 79.9
Percentage of debt due to related party			4.90%		4.90%
FLSO Term Loan Facility | Term loan facility | One- Month Duration SOFR
Debt Instrument [Line Items]
Credit spread adjustment	0.11%
FLSO Term Loan Facility | Term loan facility | Three- Month Duration SOFR
Debt Instrument [Line Items]
Credit spread adjustment	0.26%
FLSO Term Loan Facility | Term loan facility | Six- Months Duration SOFR
Debt Instrument [Line Items]
Credit spread adjustment	0.43%