Employee Benefit Plan - Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan (Details) - USD ($) $ in Millions	1 Months Ended		5 Months Ended
	Sep. 30, 2026	Jan. 31, 2026	Dec. 31, 2025	Dec. 31, 2025
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets as of August 1, 2025			$ 441.6
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation as of August 1, 2025			545.2
Pension Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets as of August 1, 2025		$ 455.1	441.6
Actual return on plan assets			28.3
Employer contributions			4.5
Benefits paid			(19.3)
Fair value of plan assets as of December 31, 2025			455.1	$ 455.1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation as of August 1, 2025		544.6	545.2
Interest cost on projected benefit obligations			12.1	12.1
Service cost			1.0	1.0
Actuarial loss			5.6	9.1
Benefits paid			(19.3)
Projected benefit obligation as of December 31, 2025			544.6	544.6
Current liabilities			0.0	0.0
Noncurrent liabilities			(89.5)	(89.5)
Funded status recognized in the consolidated balance sheet			(89.5)	(89.5)
Expected employer contributions in 2026			20.6	20.6
Pension Plan | Plan Year 2025
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Expected employer contributions in 2026			$ 7.4	$ 7.4
Pension Plan | Plan Year 2025 | Subsequent Event
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Contributions by employer, cash		$ 4.5
Pension Plan | Plan Year 2025 | Forecast
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Contributions by employer, cash	$ 2.9