Goodwill and Other Intangible Assets - Components of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	$ 10,212.6	$ 9,996.1
Accumulated amortization	(3,471.8)	(2,904.1)
Gross carrying amount	516.8	592.6
Total identifiable intangible assets	7,257.6	7,684.6
Technology [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	3,634.0	3,638.5
Accumulated amortization	(1,487.6)	(1,282.7)
Total identifiable intangible assets	2,146.4	2,355.8
Intellectual Property Rights [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	378.3	180.7
Accumulated amortization	(191.9)	(177.6)
Total identifiable intangible assets	186.4	3.1
Trademarks and Trade Names [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	659.9	664.2
Accumulated amortization	(207.6)	(169.3)
Gross carrying amount	454.9	457.1
Total identifiable intangible assets	907.2	952.0
Customer Relationships [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	5,375.0	5,384.4
Accumulated amortization	(1,489.4)	(1,194.5)
Total identifiable intangible assets	3,885.6	4,189.9
In Process Research and Development (IPR&D) [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	61.9	135.5
Total identifiable intangible assets	61.9	135.5
Other [Member]
Identifiable Intangible Assets Acquired [Line Items]
Gross carrying amount	165.4	128.3
Accumulated amortization	(95.3)	(80.0)
Total identifiable intangible assets	$ 70.1	$ 48.3