Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 13,167.1
Reclassified out of AOCI	23.1	$ 12.6
Net other comprehensive (loss) income	80.2	43.4
Ending balance	13,882.0	12,143.3
Reclassified out of AOCI	23.1	12.6
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	35.1	(13.5)
Recorded into AOCI	(46.4)	18.1
Reclassified out of AOCI	23.2	8.3
Net other comprehensive (loss) income	(23.2)	26.4
Ending balance	11.9	12.9
Reclassified out of AOCI	23.2	8.3
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(43.6)	(1.1)
Recorded into AOCI	11.3	(25.5)
Reclassified out of AOCI	(0.8)	(0.1)
Net other comprehensive (loss) income	10.5	(25.6)
Ending balance	(33.1)	(26.7)
Reclassified out of AOCI	(0.8)	(0.1)
Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(110.9)	(269.8)
Recorded into AOCI	0.2	3.5
Reclassified out of AOCI	0.7	4.4
Net other comprehensive (loss) income	0.9	7.9
Ending balance	(110.0)	(261.9)
Reclassified out of AOCI	0.7	4.4
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(834.0)	(636.7)
Recorded into AOCI	92.0	34.7
Net other comprehensive (loss) income	92.0	34.7
Ending balance	(742.0)	(602.0)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(953.4)	(921.1)
Recorded into AOCI	57.1	30.8
Reclassified out of AOCI	23.1	12.6
Net other comprehensive (loss) income	80.2	43.4
Ending balance	(873.2)	(877.7)
Reclassified out of AOCI	$ 23.1	$ 12.6