Business Segment Information Business Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2021	Dec. 31, 2020		Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues		$ 1,208,971	$ 808,924	[1]	$ 3,374,378	$ 2,233,988	[1]
Segment operating income		202,933	147,030	[1]	333,760	404,110	[1]
Restructuring Charges		(207)	20		17	110
Amortization of acquired intangible assets		75,021	23,194		191,552	62,648
Business Combination, Acquisition Related Costs	[2]	9,298	11,563		167,698	13,984
loss (gain) on fair value contingent consideration adjustments		0	(500)		0	(500)
Impact of TCJA		118	296		228	850
Net loss on divestiture of businesses		489	0		893	5	[1]
Amortization of inventory and property step-up to fair value		2,237	1,784		96,513	3,101
COVID-19 incremental costs		0	7,251		0	20,460
Assets		11,689,966			11,689,966			$ 6,574,471
Property, Plant and Equipment, Net		1,521,587			1,521,587			1,235,400
Goodwill		5,115,323			5,115,323			3,026,049
Life Sciences
Segment Reporting Information [Line Items]
Revenues		127,908	110,800		381,706	343,370
Segment operating income		52,032	41,541		158,639	136,435
Applied Sterilization Technologies
Segment Reporting Information [Line Items]
Revenues		216,298	176,462		630,092	498,371
Segment operating income		101,343	81,626		303,059	222,416
Assets		3,047,602			3,047,602			2,974,289
Corporate
Segment Reporting Information [Line Items]
Segment operating income		(55,849)	(47,941)		(202,461)	(158,463)
Segment operating income
Segment Reporting Information [Line Items]
Revenues		1,208,971	808,924		3,374,378	2,233,988
Segment operating income		289,889	190,638		790,661	504,768
Healthcare [Member] [Member]
Segment Reporting Information [Line Items]
Revenues		759,675	521,662		2,106,626	1,392,247
Segment operating income		169,267	115,412		465,817	304,380
Healthcare and Life Sciences [Member]
Segment Reporting Information [Line Items]
Assets		5,374,009			5,374,009			3,600,182
Dental
Segment Reporting Information [Line Items]
Revenues		105,090	0		255,954	0
Segment operating income		23,096	0		65,607	0
Assets		$ 1,118,528			$ 1,118,528			0
Dental | Revenue Benchmark | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration Risk, Percentage		55.80%			46.10%
Historical Average Percentage of Concentration Risk		40.00%
Healthcare /Life Sciences
Segment Reporting Information [Line Items]
Goodwill		$ 1,336,000			$ 1,336,000
AST [Member]
Segment Reporting Information [Line Items]
Goodwill		814,000			814,000
Other foreign locations [Member]
Segment Reporting Information [Line Items]
Revenues		337,593	216,211		929,262	568,655
UNITED STATES
Segment Reporting Information [Line Items]
Revenues		851,292	572,397		2,383,039	1,613,554
Property, Plant and Equipment, Net		859,601			859,601			673,784
UNITED KINGDOM
Segment Reporting Information [Line Items]
Revenues		20,086	20,316		62,077	51,779
Property, Plant and Equipment, Net		54,977			54,977			52,140
Other Foreign Entities [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Net		607,009			607,009			$ 509,476
Consumable revenues [Member] | Life Sciences
Segment Reporting Information [Line Items]
Revenues		61,096	49,627		179,380	164,262
Consumable revenues [Member] | Healthcare [Member] [Member]
Segment Reporting Information [Line Items]
Revenues		273,750	148,839		750,531	355,390
Sales Revenue, Services, Net [Member] | Life Sciences
Segment Reporting Information [Line Items]
Revenues		36,400	32,180		104,983	90,444
Sales Revenue, Services, Net [Member] | Healthcare [Member] [Member]
Segment Reporting Information [Line Items]
Revenues		268,711	224,968		785,586	629,247
Capital equipment revenues [Member] | Life Sciences
Segment Reporting Information [Line Items]
Revenues		30,412	28,993		97,343	88,664
Capital equipment revenues [Member] | Healthcare [Member] [Member]
Segment Reporting Information [Line Items]
Revenues		$ 217,214	$ 147,855		$ 570,509	$ 407,610

[1] Certain amounts have been adjusted to reflect the change in inventory accounting method, as described in our Annual Report on Form 10-K filed with the SEC on May 28, 2021.

[2] COVID-19 PandemicThe COVID-19 pandemic began to impact our business late in fiscal 2020. The pandemic and related public health recommendations and mandated precautions to mitigate the spread of COVID-19, including deferral of surgical procedures and treatments and shelter-in-place orders or similar measures, negatively affected some of our operations, which impacted our operating results, financial position and cash flows. We have experienced and expect to continue to experience unpredictable fluctuations in demand for certain of our products and services. Also, the COVID-19 pandemic has caused and continues to cause disruptions in our supply chain and labor scarcity resulting in material and labor cost inflation. External factors such as policymaker decisions to remove certain restrictions, as they evaluate the continued infection rate and COVID-19 related deaths, the emergence of new variants of the virus, and the distribution of available vaccines and other therapies create uncertainty regarding future demand from our Customers and the ability of our suppliers to meet our demands. As we continue to address supply chain disruptions, we may pursue various avenues available including getting prioritization with assistance from government agencies. However, order momentum has continued to improve and increased demand for certain capital equipment products strengthened from the fourth quarter of fiscal 2021.