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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Schedule of Fair Value Assets Measured On Recurring Basis
The following table presents information about the Company’s financial instruments that are measured at fair value on a recurring basis using the input categories discussed in Note 1:   

As of September 30, 2023
Level 1Level 2Level 3Total
Cash equivalents
Money market funds$500.6 $— $— $500.6 
U.S. Treasury securities— 14.7 — 14.7 
Commercial paper— 2.7 — 2.7 
Corporate notes and obligations— 0.8 — 0.8 
Certificates of deposit— 0.3 — 0.3 
Total cash equivalents$500.6 $18.5 $— $519.1 
Short-term investments
Corporate notes and obligations— 298.1 — 298.1 
U.S. Treasury securities— 232.9 — 232.9 
Asset backed securities— 75.8 — 75.8 
Municipal securities— 51.3 — 51.3 
Commercial paper— 19.8 — 19.8 
Certificates of deposit— 9.8 — 9.8 
U.S. agency obligations— 9.6 — 9.6 
Foreign government obligations— 5.7 — 5.7 
Supranational securities— 1.6 — 1.6 
Total short-term investments— 704.6 — 704.6 
Total $500.6 $723.1 $— $1,223.7 
As of December 31, 2022
Level 1Level 2Level 3Total
Cash equivalents
Money market funds$139.5 $— $— $139.5 
Commercial paper— 3.2 — 3.2 
Total cash equivalents$139.5 $3.2 $— $142.7 
Short-term investments
Corporate notes and obligations— 489.5 — 489.5 
U.S. Treasury securities— 346.4 — 346.4 
Asset backed securities— 111.6 — 111.6 
Municipal securities— 61.2 — 61.2 
Commercial paper— 46.4 — 46.4 
Certificates of deposit— 29.1 — 29.1 
Foreign government obligations— 5.6 — 5.6 
U.S. agency obligations— 17.6 — 17.6 
Supranational securities— 3.2 — 3.2 
Total short-term investments— 1,110.6 — 1,110.6 
Total$139.5 $1,113.8 $— $1,253.3