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Revenue recognition - Contract Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Change in Contract With Customer, Liability [Roll Forward] |  |
Beginning balance | $ 16.4 | $ 100.1
Deferral of revenue | 38.9 | 279.7
Revenue recognized | (23.6) | (363.4)
Ending balance | $ 31.7 | $ 16.4

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- Definition Change in Contract With Customer, Liability [Roll Forward] + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- 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
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Namespace Prefix: | ebs_
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- Definition Contract with Customer, Liability, Deductions + References No definition available. + Details
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Namespace Prefix: | ebs_
Data Type: | xbrli:monetaryItemType
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- 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 https://asc.fasb.org/extlink&oid=126919976&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 https://asc.fasb.org/extlink&oid=126920106&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 https://asc.fasb.org/extlink&oid=126919976&loc=SL49130532-203044 + Details
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