Context and background will be necessary to determine if it is appropriate here. It may be correct if the savings are coming from various budgets combined, for example. Global does not have to mean worldwide, of course.
I think global is fine in that case. "Global" in this context is understood to mean the whole company, not the world. I would change "got" to made or achieved as I think as a matter of style this word should be avoided where there is an alternative.