Earnings (Loss) per Share - Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Calculation of basic earnings (loss) per share:
Net income (loss) applicable to common stock	$ 221.2	$ 418.7	$ (669.5)
Weighted-average common shares outstanding - basic (in shares)	161.2	158.7	134.0
Basic earnings (loss) per share (in dollars per share)	$ 1.37	$ 2.64	$ (5.00)
Calculation of diluted earnings (loss) per share:
Net income (loss) applicable to common stock	$ 221.2	$ 418.7	$ (669.5)
Interest on Convertible Debt, Net of Tax	7.2	17.0	0.0
Diluted income applicable to common stock	$ 228.4	$ 435.7	$ (669.5)
Weighted-average common shares outstanding - diluted (in shares)	176.6	175.5	134.0
Diluted earnings (loss) per share (in dollars per share)	$ 1.29	$ 2.48	$ (5.00)
Effective Tax Rate	(26.50%)	22.00%	19.80%
Common Stock, Non-Exchangeable
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	160.6	158.6	134.0
Common Stock, Exchangeable
Calculation of basic earnings (loss) per share:
Weighted-average common shares outstanding - basic (in shares)	0.6	0.1	0.0
Convertible Notes
Calculation of diluted earnings (loss) per share:
Effective Tax Rate	21.00%	22.00%