Goodwill and Intangible Assets - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	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		$ 9,233.2	$ 9,261.8
Dental [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment	142.0
Goodwill		270.4
EMEA [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill impairment	470.0
Goodwill		$ 321.0	$ 325.9
EMEA [Member] | Reportable Segment Change [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Goodwill 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%