Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
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-Name Accounting Standards Codification
-Section 50
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
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-URI https://asc.fasb.org//1943274/2147483076/450-20-50-9

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Legal Matters (Details)	Dec. 09, 2021 claim	Jul. 16, 2020 claim	Feb. 11, 2020 request
'226 and '992 Patents \| EYLEA
Loss Contingencies [Line Items]
Number of ex parte reexamination requests \| request			2
'338 Patent And '069 Patent \| Celltrion, Inc.
Loss Contingencies [Line Items]
Number of IPR filed	2
'338 Patent And '069 Patent \| Apotex Inc.
Loss Contingencies [Line Items]
Number of IPR filed	2
'631 Patent
Loss Contingencies [Line Items]
Number of IPR filed		2