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Product Sales - Schedule of Net Product Sales (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 3,162.1	$ 2,965.1
Net product sales
Disaggregation of Revenue [Line Items]
Revenues	1,668.0	1,638.6
U.S. | EYLEA
Disaggregation of Revenue [Line Items]
Revenues	1,433.8	1,517.6
U.S. | Libtayo
Disaggregation of Revenue [Line Items]
Revenues	109.7	78.9
U.S. | Praluent
Disaggregation of Revenue [Line Items]
Revenues	40.2	33.6
U.S. | Evkeeza
Disaggregation of Revenue [Line Items]
Revenues	14.9	8.5
U.S. | Inmazeb
Disaggregation of Revenue [Line Items]
Revenues	2.2	0.0
ROW | Libtayo
Disaggregation of Revenue [Line Items]
Revenues	$ 67.2	$ 0.0

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