Earnings per Share (EPS) - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Antidilutive shares excluded from EPS calculation (in shares)	100,000	1,200,000	100,000	1,200,000
Weighted average shares outstanding — diluted	144,000,000.0	101,200,000	140,100,000	99,800,000
Dilutive impact of share-based compensation awards	1,800,000	0	1,500,000	0
Dilutive impact of 2028 Convertible Notes	16,100,000	0	10,900,000	0
Basic income (loss) per share	$ 2.85	$ (0.26)	$ 2.08	$ (1.05)
Loss from discontinued operations	(0.01)	(0.02)	(0.01)	(0.04)
Basic income (loss) per share	$ 2.84	$ (0.28)	$ 2.07	$ (1.09)
Income (loss) from continuing operations, net of income taxes	$ 411.3	$ (23.0)	$ 291.5	$ (100.7)
Loss from discontinued operations, net of income taxes	(0.7)	(2.3)	(1.5)	(4.3)
Less: Net income attributable to noncontrolling interests	1.1	3.3	0.0	3.7
Income (loss) from continuing operations attributable to common stockholders	410.2	(26.3)	291.5	(104.4)
Income (loss) from continuing operations attributable to common stockholders	412.7	(26.3)	295.0	(104.4)
Net income (loss) attributable to common stockholders	$ 412.0	$ (28.6)	$ 293.5	$ (108.7)
Weighted average shares outstanding — diluted	161,900,000	101,200,000	152,500,000	99,800,000