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Benefit Plans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 25,935	$ 24,037	$ 22,676
Defined Contribution Plan, Fair Value of Plan Assets	$ 703,740
STERIS Corporation shares held in defined contribution plan	617,900
Fair value of STERIS Corporatio stock held in defined contribution plan	$ 79,110
Defined Contribution Plan, Dividends Paid	826	781	$ 734
Deferred Compensation Plan Assets	$ 1,400	$ 1,583
Equity Securities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	75.00%
Debt Securities
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25.00%

X

- Definition

Defined Contribution Plan, Dividends Paid

+ References

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- Definition

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+ References

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- Definition

Fair value of STERIS Corporatio stock held in defined contribution plan

+ References

No definition available.

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- Definition

STERIS Corporation shares held in defined contribution plan

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of assets held under deferred compensation agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

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