Current estimates are that there are $2.6 trillion held overseas by the 1,000 largest public companies. There are also private companies that could be doing this.
The resulting influx to treasury should be over $200 to $300 billion (some may not repatriate) which is not a bad days' work. To Freeman's critique that the money will just go to pay CEOs, dividends, and share buyback, my response is that all 3 of those are taxable events. So that could be over $1 trillion of additional income at various tax rates. (The share purchase cap gains would not all be income because it depends on basis and where the shares are held. Similarly dividends in retirement accounts would not yet be taxable.)
These facts are not reported in the media or on my Facebook feed which is running against the tax plan 100 to 1.
BTW, I analyzed my own tax situation this weekend and our taxes increase by $300 under the new plan. Losing or reducing our state tax deduction is a big deal for this Mass. resident and counteracts the other positive changes. I'm still for the plan because of the positive corporate changes which people just don't understand or don't want to understand or there's always the chance that I am wrong :) .