Goodwill and Intangible Assets - Additional Information (Detail) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Indefinite Lived Intangible Assets By Major Class [Line Items]
Reporting units with goodwill assigned to them		3
Impairment				$ 612.0
Goodwill	$ 8,982.4			8,982.4		$ 9,599.7
Intangible asset impairment				19.0
In-Process Research and Development [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Intangible asset impairment	33.0		$ 70.1	33.0	$ 70.1
Remaining impairment charge of intangible assets indefinite lived excluding goodwill				14.0
Dental [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment		$ 142.0		142.0
Goodwill	255.0			255.0
EMEA [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment		470.0		470.0
Goodwill	$ 292.7			$ 292.7		$ 749.8
EMEA [Member] | Reportable Segment Change [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment		$ 470.0
America CMFT [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Reporting units with goodwill assigned to them		2
Percentage of fair value in excess of carrying amount	5.00%			5.00%