Legal Matters (Details)	Dec. 09, 2021 claim	Jul. 16, 2020 claim	Feb. 11, 2020 request	Feb. 25, 2019 claim	Feb. 14, 2019 claim	Mar. 23, 2017 claim
'165 Patent | Amgen v.s. Regeneron | Pending Litigation
Loss Contingencies [Line Items]
Pending claims				2
Invalid claims				2
'741 Patent | Amgen v.s. Regeneron | Pending Litigation
Loss Contingencies [Line Items]
Pending claims				1
'487 Patent
Loss Contingencies [Line Items]
Number of IPR filed						2
Number of claims invalidated					17
'631 Patent
Loss Contingencies [Line Items]
Number of IPR filed		2
'226 Patent and '992 Patent | EYLEA Aflibercept Injection
Loss Contingencies [Line Items]
Number of ex parte reexamination requests | request			2
'338 Patent and '069 Patent | Apotex Inc.
Loss Contingencies [Line Items]
Number of IPR filed	2
'338 Patent and '069 Patent | Celltrion, Inc.
Loss Contingencies [Line Items]
Number of IPR filed	2