I survived several layoff rounds at a large company so my guess is no department is safe and they will likely ask every department for X%, just those depts I mentioned maybe for a higher percentage. If you're laying off 5-10% of the company you really don't need a lot of recruiters, right? There are probably obvious employees that are safe, key contributors on key projects they don't want to lose. I don't work there so I don't even know how they are organized.