Earnings per Share - Schedule of Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Calculation of basic earnings (loss) per share:
Net income (loss) applicable to common stock	$ (114.7)	$ 512.8
Weighted-average common shares outstanding - basic (in shares)	151.9	153.3
Basic earnings (loss) per share (in dollars per share)	$ (0.76)	$ 3.35
Calculation of diluted earnings (loss) per share:
Net income (loss) applicable to common stock	$ (114.7)	$ 512.8
Convertible Notes	0.0	1.8
Diluted income (loss) applicable to common stock	$ (114.7)	$ 514.6
Weighted average common shares outstanding - diluted (in shares)	151.9	168.6
Diluted earnings (loss) per share (in dollars per share)	$ (0.76)	$ 3.05
Effective tax rate	14.80%	23.80%
Convertible Notes
Calculation of diluted earnings (loss) per share:
Effective tax rate		21.00%
Common Stock, Non-Exchangeable
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	151.4	152.7
Common Stock, Exchangeable
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	0.5	0.6