Apple : "We have so much money we literally don't know what to do with it anymore."
That's alright. Neither do Google or Microsoft and a few others. They simply can't find investment opportunities large enough and profitable enough to do anything with their piles of cash. So the pile keeps growing. Eventually I expect it to attract a dragon or something.
Really they should be paying it back as dividends if they can't figure out what to do with the money.
The reason they have large piles of cash isn't that they can't figure out what to do with it, it's that it's cash they generated overseas they can't move it to the US without giving 35% of it to the federal government. They can't pay it out as dividends without repatriating it, nor can they invest it in anything in the US. Since most of their operations are in the US, that means they spend a little on overseas operations and put the rest in high-liquidity overseas investments -- high-liquidity in case they get an opportunity to repatriate it cheaply, or have a sudden need that makes the big tax bite acceptable.
Bottom line: the reason they have big piles of cash is because the US has the highest corporate income tax rate in the developed world.