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Document and Entity Information
 9 Months Ended
Sep. 30, 2020
Cover page.  
Document Type S-4/A
Amendment Flag true
Entity Registrant Name Longview Acquisition Corp.
Entity Central Index Key 0001804176
Amendment Description Amendment No. 2
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false