Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income (loss)	$ 670.1	$ 4,797.5	$ 1,627.0
Subtract:
Net income (loss) attributable to noncontrolling interest	46.9	40.6	46.8
Total net income (loss), basic	623.2	4,756.9	1,580.2
Total net income (loss), diluted	$ 623.2	$ 4,756.9	$ 1,580.2
Weighted-average shares outstanding:
Basic	241.3	251.1	269.0
Dilutive effects:
Diluted	244.6	255.3	272.9
Net income (loss) per common share:
Basic	$ 2.58	$ 18.94	$ 5.87
Diluted	$ 2.55	$ 18.63	$ 5.79
Employee Stock Option
Dilutive effects:
Stock-based compensation awards	0.9	1.5	1.3
Restricted Stock Units
Dilutive effects:
Stock-based compensation awards	2.0	2.2	2.1
Performance Share Awards
Dilutive effects:
Stock-based compensation awards	0.4	0.5	0.5