Earnings per Share - Schedule of Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Calculation of basic loss per share:
Net loss applicable to common stock	$ (36.7)	$ (724.8)	$ (178.2)	$ (131.9)
Weighted-average common shares outstanding - basic (in shares)	152.2	150.9	152.1	152.3
Basic loss per share (in dollars per share)	$ (0.24)	$ (4.80)	$ (1.17)	$ (0.87)
Calculation of diluted loss per share:
Diluted loss applicable to common stock	$ (36.7)	$ (724.8)	$ (178.2)	$ (131.9)
Weighted average common shares outstanding - diluted (in shares)	152.2	150.9	152.1	152.3
Diluted loss per share (in dollars per share)	$ (0.24)	$ (4.80)	$ (1.17)	$ (0.87)
Common Stock, Non-Exchangeable
Calculation of basic loss per share:
Weighted-average common shares outstanding - basic (in shares)	151.7	150.3	151.6	151.7
Common Stock, Exchangeable
Calculation of basic loss per share:
Weighted-average common shares outstanding - basic (in shares)	0.5	0.6	0.5	0.6