Compensation Related Costs, Share Based Payments (Details) - Continuing Operations	3 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($) employee	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 58,800,000	$ 51,900,000	$ 78,900,000
Share-based payment arrangement, total equity grant to employees	$ 150,000,000
Share-based payment arrangement, total equity grant to employees, number of employees | employee	16,000
Equity Awards | 2013 Stock Incentive Plan and 2017 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		58,800,000	51,100,000	80,000,000.0
Stock Appreciation Rights (SARs) | 2013 Stock Incentive Plan and 2017 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 0	$ 800,000	$ (1,100,000)
Equity Awards - Founders Grant | 2013 Stock Incentive Plan and 2017 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 39,500,000