Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated goodwill impairment losses	$ 8.3		$ 8.3		$ 8.3
Goodwill impairment loss			0.0	$ 0.0
Aggregate amortization expense	$ 12.4	$ 14.4	37.3	44.2
Impairment of intangible assets		18.1	1.6	20.5
Cardiovascular
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets		$ 18.1		$ 20.5
ArraVasc Limited
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets			$ 1.6