The magnitude of the underfunding was astronomical. One study of just the 348 companies in the S&P 500 with defined benefit pension programs concluded that this underfunding amounted to between $184 and $323 billion (if non-pension benefits, such as health benefits, are included, the deficit is in the range of $458 to $638 billion). A Merrill Lynch study showed that companies with off-balance-sheet pension liabilities that exceed their total equity value include Campbell Soup, Maytag, Lucent, General Motors, Ford, Goodyear, Boeing, U.S. Steel, and Colgate Palmolive. While the accounting standards may have disguised the true size of the pension liabilities, they were in fact real liabilities, obligations of the corporations to their workers. They represented a potential source of bankruptcy for many of America's most important companies.