Companies are private enterprises who's main purpose is to make a profit. They don't hide money offshore, they move money wherever it's not taxed as much. And the EU is pretty rough about that stuff anyway, especially when it comes to US corporations.

Car manufacturing is also a rather tough business to be in today - definitely not the money hiding type, but rather the "we build a factory in <insert industrial town with unemployment here> if you give some sort of tax break for a couple of years".