Basis of Presentation and Description of Business - Use of Proceeds from IPO (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 06, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 18, 2022	Dec. 20, 2021	Feb. 08, 2019
Class of Stock [Line Items]
Gross proceeds	$ 2,381.0
Underwriter fees	89.1
IPO related expenses	42.8
Redemption of Series A Preferred Stock	1,067.9	$ 0.0	$ 0.0	$ 1,067.9
Make-whole payment on redemption of preferred stock	205.2
Cash to balance sheet	331.7
Change in fair value of make-whole derivative liability		0.0	$ 0.0	(32.8)
10.250% Senior Unsecured Notes Due 2027
Class of Stock [Line Items]
Make-whole payment on redemption of Series A Preferred Stock	312.0
Debt early redemption premium expense	30.8
10.250% Senior Unsecured Notes Due 2027 | Unsecured Debt
Class of Stock [Line Items]
Debt early redemption premium expense		29.5		$ 30.8
Interest rate on debt instrument (as a percent)			10.25%	10.25%			10.25%
6.875% Senior Secured Notes Due 2026
Class of Stock [Line Items]
Make-whole payment on redemption of Series A Preferred Stock	282.2
Debt early redemption premium expense	19.3
6.875% Senior Secured Notes Due 2026 | Secured Debt
Class of Stock [Line Items]
Debt early redemption premium expense		$ 16.3		$ 19.3
Interest rate on debt instrument (as a percent)		6.875%	6.875%	6.875%	6.875%	6.875%	6.875%
Star Parent, L.P. | Affiliated Entity
Class of Stock [Line Items]
IPO related expenses	30.0
THL Managers | Affiliated Entity
Class of Stock [Line Items]
IPO related expenses	2.5
Bilcar | Board of Directors Chairman
Class of Stock [Line Items]
IPO related expenses	2.5
CC Star Holdings, LP | Director
Class of Stock [Line Items]
IPO related expenses	$ 2.5