Cumulative Effect of Change in Consolidated Income Statement (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		$ 4,176.2		$ 13,525.3
Income taxes	$ 210.3	106.7	$ 582.9	389.0
Net income	$ 769.4	380.5	$ 2,090.3	1,346.8
Originally Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		4,180.1		13,533.5
Income taxes		105.6		386.9
Net income		377.7		1,340.7
Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		(3.9)		(8.2)
Income taxes		1.1		2.1
Net income		$ 2.8		$ 6.1