Intangible Assets - Narrative (Details)	3 Months Ended
Jul. 31, 2019 USD ($) reporting_unit	Jul. 31, 2018 USD ($)
Goodwill [Line Items]
Number of reporting units	3
Goodwill, Impairment Loss \| $	$ 0	$ 0
CooperSurgical
Goodwill [Line Items]
Number of reporting units	2

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration