There's info on SymInfo as well as an older Excel spreadsheet that will get you a rough estimate. Severance starts with a base X number of weeks of pay, and then you get an additional week of pay for every year you worked after that. I left the company in 2018, and the deal was a little less than what was being offered previously or so it seemed from the old spreadsheet, so I would recommend asking for a current spreadsheet/formula if you're laid off, and definitely do the calculation yourself.
Overall I was pleased with the package I received, and felt it was pretty generous, all things considered. I won't say getting laid off was fun. I was burned out on SYMC by the time I left, but it's still not easy to hear you're being laid off. Your mind sort of goes over this mental gymnastics of what the heck am I going to do now? Still, the package let me take the time needed to find a new position, and then some, and once the dust settled I think it was the best thing for me and Symantec. For everyone on the chopping block, I know it's a mix of emotions, but there's light at the end of the tunnel, and know that this is really just a business decision coming from the top, and the company as a whole is struggling right now to make it work. It's not fun, and we've all seen a lot of great people walked out the doors, but Symantec as a whole needs to slim down considerably to survive, whatever that survival is going to look like. Here's hoping everyone that is laid off finds a nice landing quickly, and has a little extra severance money left to show for it!
I thought other people might miss this as a reply, so I'm bumping it in a thread. Posted by @10aIHkZi-8rmi.