Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 1,852.1	$ 1,298.4	$ 2,387.9
Unrealized gains (losses) on derivative contracts
Net gain (loss) arising during the period	54.2	(105.3)	(76.1)
Tax effect	(14.3)	26.9	19.1
Reclassification adjustment	(33.7)	87.6	51.7
Tax effect	9.5	(23.1)	(12.0)
Net current period OCI, unrealized gains (losses) on derivative contracts	15.7	(13.9)	(17.3)
Unrealized (losses) gains on marketable debt securities
Net holding (loss) gain	(18.8)	13.6	11.6
Tax effect	4.7	(3.3)	(2.9)
Reclassification adjustment	(2.1)	(2.4)	(0.4)
Tax effect	0.5	0.6	0.1
Net current period OCI, unrealized (losses) gains on marketable debt securities	(15.7)	8.5	8.4
Pension plans
Net gain (loss) arising during the period	343.2	(132.4)	(74.8)
Tax effect	(80.3)	28.4	18.0
Reclassification adjustment	59.5	57.3	21.9
Tax effect	(14.1)	(13.7)	(5.0)
Net current period OCI, pension plans	308.3	(60.4)	(39.9)
Foreign currency translation (loss) gain	(179.1)	115.6	47.2
Net other comprehensive income (loss)	129.2	49.8	(1.6)
Comprehensive Income	$ 1,981.3	$ 1,348.2	$ 2,386.3