David Cay Johnston at Reuters reports:

IRS data suggests that, globally, U.S. nonfinancial companies hold at least three times more cash and other liquid assets than the Federal Reserve reports, idle money that could be creating jobs, funding dividends or even paying a stiff federal penalty tax for hoarding corporate cash.

The Fed's latest Flow of Funds report showed that U.S. nonfinancial companies held $1.7 trillion in liquid assets at the end of March. But newly released IRS figures show that in 2009 these companies held $4.8 trillion in liquid assets, which equals $5.1 trillion in today's dollars, triple the Fed figure.
...
This cash pool came to $16,700 for every man, woman and child in the United States, a 53 percent real increase from 2004, my calculations from IRS data show.

You don't have to sit idle and frustrated pondering how many jobs these companies could be creating if they weren't just hoarding all this cash. As Johnston explains here:

Want to motivate companies to put some of those trillions of dollars of idle cash to work creating jobs, paying dividends or sharing the burden of taxes? Call 1-202-224-3121 and tell your senator or representative you want Section 531 vigorously enforced - now - and the offshore loophole closed immediately.