I'm not surprised this is happening in a massive group of companies. I once worked for a smallish company with 400 staff, with basically one product, but different teams - backend, frontend, database, QA, sales, etc... If you were ever speaking to someone from a different team for more than 15 minutes, it had to be put into your weekly timesheet so your time could be cross-billed to the other department.

Obviously the net effect was to silo all the different departments so that nobody really knew how the entire product worked, except the few smokers who'd regularly go outside and smoke for 15+ minutes and chat to whoever else was around.