CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Total Century Equity	Preferred stock	Common stock	Additional paid-in capital	Treasury stock, at cost	Accumulated other comprehensive loss	Accumulated deficit	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2021			58,542
Beginning balance at Dec. 31, 2021	$ 421.0	$ 421.0	$ 0.0	$ 1.0	$ 2,535.5	$ (86.3)	$ (82.3)	$ (1,946.9)	$ 0.0
Beginning balance (in shares) at Dec. 31, 2021				91,231,611
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	99.4	99.4						99.4
Other comprehensive income	(5.9)	(5.9)					(5.9)
Share-based compensation (in shares)				66,001
Share-based compensation	2.1	2.1			2.1
Conversion of preferred stock to common stock (in shares)			(496)	49,617
Ending balance (in shares) at Sep. 30, 2022			58,046
Ending balance at Sep. 30, 2022	516.6	516.6	$ 0.0	$ 1.0	2,537.6	(86.3)	(88.2)	(1,847.5)	0.0
Ending balance (in shares) at Sep. 30, 2022				91,347,229
Beginning balance (in shares) at Jun. 30, 2022			58,376
Beginning balance at Jun. 30, 2022	479.0	479.0	$ 0.0	$ 1.0	2,537.0	(86.3)	(80.9)	(1,891.8)	0.0
Beginning balance (in shares) at Jun. 30, 2022				91,270,374
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	44.3	44.3						44.3
Other comprehensive income	(7.3)	(7.3)					(7.3)
Share-based compensation (in shares)				43,873
Share-based compensation	0.6	0.6			0.6
Conversion of preferred stock to common stock (in shares)			(330)	32,982
Ending balance (in shares) at Sep. 30, 2022			58,046
Ending balance at Sep. 30, 2022	516.6	516.6	$ 0.0	$ 1.0	2,537.6	(86.3)	(88.2)	(1,847.5)	0.0
Ending balance (in shares) at Sep. 30, 2022				91,347,229
Beginning balance (in shares) at Dec. 31, 2022			53,855
Beginning balance at Dec. 31, 2022	$ 399.3	399.3	$ 0.0	$ 1.0	2,539.6	(86.3)	(94.0)	(1,961.0)	0.0
Beginning balance (in shares) at Dec. 31, 2022	92,323,978			92,323,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ (77.9)	(73.1)						(73.1)	(4.8)
Other comprehensive income	5.0	5.0					5.0
Share-based compensation (in shares)				46,059
Share-based compensation	2.2	2.2			2.2
Conversion of preferred stock to common stock (in shares)			(347)	34,626
Noncontrolling interest of business acquired	58.1								58.1
Ending balance (in shares) at Sep. 30, 2023			53,508
Ending balance at Sep. 30, 2023	$ 386.7	333.4	$ 0.0	$ 1.0	2,541.8	(86.3)	(89.0)	(2,034.1)	53.3
Ending balance (in shares) at Sep. 30, 2023	92,404,663			92,404,663
Beginning balance (in shares) at Jun. 30, 2023			53,707
Beginning balance at Jun. 30, 2023	$ 404.8	372.9	$ 0.0	$ 1.0	2,541.0	(86.3)	(90.7)	(1,992.1)	31.9
Beginning balance (in shares) at Jun. 30, 2023				92,358,549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(45.9)	(42.0)						(42.0)	(3.9)
Other comprehensive income	1.7	1.7					1.7
Share-based compensation (in shares)				26,324
Share-based compensation	0.8	0.8			0.8
Conversion of preferred stock to common stock (in shares)			(199)	19,790
Noncontrolling interest of business acquired	25.3								25.3
Ending balance (in shares) at Sep. 30, 2023			53,508
Ending balance at Sep. 30, 2023	$ 386.7	$ 333.4	$ 0.0	$ 1.0	$ 2,541.8	$ (86.3)	$ (89.0)	$ (2,034.1)	$ 53.3
Ending balance (in shares) at Sep. 30, 2023	92,404,663			92,404,663