I rather doubt that you would get this from Avast or other AV companies. There are millions of signatures in the database, 5,374,921 currently. Such a document could well be useful to others, not to mention each different antivirus company could and do have different signature/malware names. So it would be almost impossible to draw a direct comparison.
This doesn't mean that there are only 5,374,921 detections as the signatures are highly optimised to reduce the size of the database to help with performance.
These detections are capable of detecting many different variants for a single signature. Not to mention behavioural detections, which might not have a specific signature in the database.