Net Loss Per Share (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator (basic and diluted):
Net loss	$ (455.0)	$ (22.5)	$ (467.2)	$ (9.1)
Less: Dividends to participating securities	(0.5)	(0.2)	(0.7)	(0.7)
Net loss attributable to Common Stockholders, basic	(455.5)	(22.7)	(467.9)	(9.8)
Net loss attributable to Common Stockholders, diluted	$ (455.5)	$ (22.7)	$ (467.9)	$ (9.8)
Denominator:
Average number of common shares outstanding (in shares)	54,659,100	52,593,900	54,600,100	38,415,900
Effect of dilutive stock-based compensation (in shares)	0	0	0	0
Average number of common and potential common shares outstanding (in shares)	54,659,100	52,593,900	54,600,100	38,415,900