Earnings Per Common Share - Basic and Diluted Net Income Per Common Unit (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic
Net income attributable to common shares	$ 532,800,000	$ 295,500,000	$ 2,327,100,000	$ (170,600,000)
Weighted-average common shares outstanding (in shares)	355,954,734	351,567,631	354,903,371	349,468,329
Net income (loss) per common share (in dollars per share)	$ 1.50	$ 0.84	$ 6.56	$ (0.49)
Diluted
Net loss attributable to common shares	$ 532,800,000	$ 295,500,000	$ 2,327,100,000	$ (170,600,000)
Weighted-average common shares outstanding (in shares)	364,740,675	358,405,845	362,471,998	349,468,329
Net loss per common share (in dollars per share)	$ 1.46	$ 0.82	$ 6.42	$ (0.49)