Here is a quick summary of the severance guidelines (link below) - most people here will give you info that they have - which is in many cases outdated.
Ginni changed the rules as they prep to lay off more folks and they simply do not care about workforce any more - IT is being #commoditized and there always a brand new and super-cheap #H1B waiting to foll your shoes...
Anyhow, there is the link: http://www.zdnet.com/article/ibm-alters-severance-terms/