Goodwill and Intangible Assets - Additional Information (Detail) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Indefinite Lived Intangible Assets By Major Class [Line Items]
Reporting units with goodwill assigned to them			3
Goodwill impairment					$ 612.0
Goodwill				$ 9,212.0		$ 9,261.8
In Process Research and Development [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 16.3	$ 33.0		16.3	33.0
Dental [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment			$ 142.0		142.0
Goodwill				269.3
EMEA [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment			470.0		470.0
Goodwill				$ 319.0		$ 325.9
EMEA [Member] | Reportable Segment Change [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment			$ 470.0		$ 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%