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Revenue recognition - Contract Liabilities (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)
Change in Contract With Customer, Liability [Roll Forward]
Beginning of period	$ 100.1
Deferral of revenue	194.7
Revenue recognized	(191.4)
End of period	$ 103.4

X

- Definition

Change in Contract With Customer, Liability [Roll Forward]

+ References

No definition available.

+ Details

Name:	ebs_ChangeinContractWithCustomerLiabilityRollForward
Namespace Prefix:	ebs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable recorded during the current reporting period.

+ References

No definition available.

+ Details

Name:	ebs_ContractWithCustomerLiabilityAdditions
Namespace Prefix:	ebs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Contract with Customer, Liability, Deductions

+ References

No definition available.

+ Details

Name:	ebs_ContractWithCustomerLiabilityDeductions
Namespace Prefix:	ebs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044

+ Details

Name:	us-gaap_ContractWithCustomerLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant