Components of Comprehensive Income, Net of Related Tax (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,221.1	$ 720.4	$ 1,955.0	$ 1,320.9
Other comprehensive income (loss) (OCI):
Unrealized (losses) gains on derivative contracts	(33.0)	1.0	(62.5)	37.1
Tax effect	7.6	(1.2)	13.9	(10.9)
Net current period OCI, unrealized (losses) gains on derivative contracts	(25.4)	(0.2)	(48.6)	26.2
Unrealized (losses) gains on marketable debt securities	(10.3)	(10.4)	3.7	(44.5)
Tax effect	2.6	2.6	(0.9)	11.1
Net current period OCI, unrealized gains (losses) on marketable debt securities	(7.7)	(7.8)	2.8	(33.4)
Pension plans	2.3	19.9	3.3	30.2
Tax effect	(0.3)	(5.1)	(0.4)	(7.5)
Net current period OCI, pension plans	2.0	14.8	2.9	22.7
Foreign currency translation gains (losses)	126.5	(240.8)	218.5	(206.1)
Net other comprehensive income (loss)	95.4	(234.0)	175.6	(190.6)
Comprehensive income	$ 1,316.5	$ 486.4	$ 2,130.6	$ 1,130.3