Components of Comprehensive Income, Net of Related Tax (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,228.5	$ 769.4	$ 3,183.5	$ 2,090.3
Other comprehensive income (loss) (OCI):
Unrealized gains (losses) on derivative contracts	38.6	24.3	(23.9)	61.4
Tax effect	(8.8)	(6.3)	5.1	(17.2)
Net current period OCI, unrealized (losses) gains on derivative contracts	29.8	18.0	(18.8)	44.2
Unrealized gains (losses) on marketable debt securities	2.5	(22.7)	6.2	(67.2)
Tax effect	(0.7)	5.5	(1.6)	16.6
Net current period OCI, unrealized gains (losses) on marketable debt securities	1.8	(17.2)	4.6	(50.6)
Pension plans	1.4	20.2	4.7	50.4
Tax effect	(0.7)	(5.1)	(1.1)	(12.6)
Net current period OCI, pension plans	0.7	15.1	3.6	37.8
Foreign currency translation (losses) gains	(192.1)	(297.3)	26.4	(503.4)
Net other comprehensive (loss) income	(159.8)	(281.4)	15.8	(472.0)
Comprehensive income	$ 1,068.7	$ 488.0	$ 3,199.3	$ 1,618.3