Cumulative Effect of Change in Consolidated Income Statement (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		$ 4,659.4		$ 9,349.1
Income taxes	$ 201.7	144.8	$ 372.6	282.3
Net income	$ 720.4	495.5	$ 1,320.9	966.3
Originally Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		4,662.7		9,353.4
Income taxes		144.1		281.3
Net income		492.9		963.0
Adjustment
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Cost of sales and revenues		(3.3)		(4.3)
Income taxes		0.7		1.0
Net income		$ 2.6		$ 3.3