[Suppafly]

>Severance would be there even if you are let go i.e laid off

Depends on their employment contract, I don't think it's necessarily guaranteed.

[snailmailstare]

The rules are complex but if a company wants to lay off many people in one location they have to give notice in advance and usually choose to just payout that notice time.

[HamsterDan]

It's not guaranteed, but Google does give you severance if you're fired for low performance.

I'd assume you have to agree not to sue them in order to get it though.