They would probably return that money to shareholders which they don't feel they can do at the moment because it is mostly held outside the US.
Before you think of moving to Belgium: US citizens can't escape the IRS, no matter where they live, and so do pay capital gains tax.
Apple, for example, is always extremely focused. Their products fit on one table.
Google's moonshots could get very expensive, especially if they venture farther into healthcare.
$20 billion R&D budgets can't be too hard to achieve. http://fortune.com/2014/11/17/top-10-research-development/