Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income (loss)	$ 380.7	$ 516.3
Subtract:
Net income (loss) attributable to noncontrolling interest	4.5	(0.8)
Adjustments to redemption amounts of redeemable noncontrolling interests		1.9
Total	$ 376.2	$ 515.2
Weighted-average shares outstanding:
Basic	259.4	272.9
Dilutive effects:
Diluted	263.8	276.0
Net income (loss) per common share:
Basic	$ 1.45	$ 1.89
Diluted	$ 1.43	$ 1.87
Nonqualified Stock Options
Dilutive effects:
Stock-based compensation awards	1.6	0.8
Restricted Stock Units
Dilutive effects:
Stock-based compensation awards	2.3	2.0
Performance Share Awards
Dilutive effects:
Stock-based compensation awards	0.5	0.3