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QUARTERLY FINANCIAL RESTULTS AND MARKET FOR THE COMPANY'S STOCK (UNAUDITED) - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended				12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Class of Stock [Line Items]
Gain (loss) on litigation settlement			$ 367.9
Inventory write off				$ 26.9	$ 46.2	$ 0.0	$ 73.1	$ 0.0
Early-stage Transcatheter Intellectual Property
Class of Stock [Line Items]
Acquisition transaction costs									$ 24.0
Developed technology | Valtech
Class of Stock [Line Items]
Impairment of intangible assets		$ 40.6
Rest of World | Developed technology | Valtech
Class of Stock [Line Items]
Impairment of intangible assets	$ 40.6

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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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