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Goodwill and Intangible Assets Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Goodwill [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)		$ 13,000	$ 35,266
Asset Impairment Charges	$ 16,249
Goodwill		2,322,928	2,433,784	$ 2,231,303
Goodwill, Impairment Loss		0	0	(58,356)	[1]
Finite-Lived Intangible Assets, Amortization Expense		98,747	70,195	68,607
Finite-Lived Intangible Assets, Gross		973,357	1,032,907
Finite-Lived Intangible Assets, Accumulated Amortization		368,743	305,927
Healthcare Specialty Services [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss				(58,356)
goodwill acquired or allocated member
Goodwill [Line Items]
Goodwill, Acquired During Period		3,232	35,766
Foreign Currency Gain (Loss)
Goodwill [Line Items]
Goodwill		(114,088)	166,715
Healthcare Specialty Services [Member]
Goodwill [Line Items]
Goodwill		374,910	388,025	375,879
Healthcare Specialty Services [Member] | goodwill acquired or allocated member
Goodwill [Line Items]
Goodwill, Acquired During Period		(907)	3,501
Healthcare Specialty Services [Member] | Foreign Currency Gain (Loss)
Goodwill [Line Items]
Goodwill		(12,208)	10,500
Life Science Member [Member]
Goodwill [Line Items]
Goodwill		147,795	148,816	146,514
Life Science Member [Member] | goodwill acquired or allocated member
Goodwill [Line Items]
Goodwill, Acquired During Period		0	0
Life Science Member [Member] | Foreign Currency Gain (Loss)
Goodwill [Line Items]
Goodwill		(1,021)	2,302
Applied Sterilization Technologies [Member]
Goodwill [Line Items]
Goodwill		1,402,939	1,492,269	1,331,145
Applied Sterilization Technologies [Member] | goodwill acquired or allocated member
Goodwill [Line Items]
Goodwill, Acquired During Period		5,341	15,847
Applied Sterilization Technologies [Member] | Foreign Currency Gain (Loss)
Goodwill [Line Items]
Goodwill		(94,671)	143,422
Healthcare Products [Member]
Goodwill [Line Items]
Goodwill		397,284	404,674	$ 377,765
Healthcare Products [Member] | goodwill acquired or allocated member
Goodwill [Line Items]
Goodwill, Acquired During Period		(1,202)	16,418
Healthcare Products [Member] | Foreign Currency Gain (Loss)
Goodwill [Line Items]
Goodwill		(6,188)	10,491
Trademarks and Trade Names [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Gross		63,570	83,509
Finite-Lived Intangible Assets, Accumulated Amortization		$ 38,850	$ 36,864
[1] For more information regarding our goodwill impairment loss see Note 3 titled, "Goodwill and Intangible Assets"

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