Earnings per Share (EPS) - Calculation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Basic EPS numerator:
Weighted average shares outstanding — basic	133,200,000	144,100,000	140,000,000.0	141,400,000
Dilutive impact of share-based compensation awards	600,000	1,700,000	600,000	1,600,000
Dilutive impact of 2028 Convertible Notes	16,100,000	16,100,000	16,100,000	12,600,000
Basic income per share	$ 0.88	$ 2.61	$ 4.06	$ 4.72
Income (loss) from discontinued operations	0.02	(0.01)	(0.01)	(0.02)
Basic income per share	$ 0.90	$ 2.60	$ 4.05	$ 4.70
Income from continuing operations, net of income taxes	$ 128.8	$ 384.4	$ 617.0	$ 675.9
Add: Tax adjusted interest expense related to 2028 Convertible Notes	3.0	2.6	9.1	6.1
Income (loss) from discontinued operations, net of income taxes	2.5	(0.8)	(0.1)	(2.3)
Less: Net income attributable to noncontrolling interests	11.4	8.5	49.3	8.5
Income from continuing operations attributable to common stockholders	117.4	375.9	567.7	667.4
Income from continuing operations attributable to common stockholders	120.4	378.5	576.8	673.5
Net income attributable to common stockholders	$ 122.9	$ 377.7	$ 576.7	$ 671.2
Weighted average shares outstanding — diluted	149,900,000	161,900,000	156,700,000	155,600,000
Less: Net income attributable to noncontrolling interests	$ 11.4	$ 8.5	$ 49.3	$ 8.5
Income from continuing operations attributable to common stockholders	120.4	378.5	576.8	673.5
Income (loss) from discontinued operations, net of income taxes	2.5	(0.8)	(0.1)	(2.3)
Net income attributable to common stockholders	$ 119.9	$ 375.1	$ 567.6	$ 665.1
Diluted EPS attributable to common stockholders:
Income from continuing operations	$ 0.80	$ 2.34	$ 3.68	$ 4.33
Income (loss) from discontinued operations	0.02	(0.01)	0	(0.02)
Net income attributable to common stockholders	$ 0.82	$ 2.33	$ 3.68	$ 4.31
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive impact of 2028 Convertible Notes	16,100,000	16,100,000	16,100,000	12,600,000
Impact of dilutive securities (in shares)	16,100,000	16,100,000	16,100,000	12,600,000