Cumulative Effect of Change in Consolidated Income Statement (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Income taxes	$ 1,117.4	$ 837.1	$ 530.8
Net Income (Loss)	$ 4,600.8	$ 3,011.6	$ 1,865.5