In deciding to rescue A.I.G., the government worried that if it did not bail out the company, its collapse could lead to a cascading chain reaction of losses, jeopardizing the stability of the worldwide financial system.

The list released by A.I.G. on Sunday, detailing payments made between September and December of last year, could bolster that justification by illustrating the breadth of losses that might have occurred had A.I.G. been allowed to fail. Some of the companies, like Goldman Sachs and Société Générale, had exposure mainly through A.I.G.’s derivatives program. Others, though, like Barclays and Citigroup, stood to lose mainly because they were customers of A.I.G.’s securities-lending program, which does not involve derivatives.

But taxpayers may have a hard time accepting that so many marquee financial companies  including some American banks that received separate government help and others based overseas  benefiting from government money.

The outrage that has been aimed at A.I.G. could complicate the Obama administration’s ability to persuade Congress to authorize future bailouts.

Patience with the company’s silence began to run out this month after it disclosed the largest loss in United States history and had to get a new round of government support. Members of Congress demanded in two hearings to know who was benefiting from the bailout and threatened to vote against future bailouts for anybody if they did not get the information.

“A.I.G.’s trading partners were not innocent victims here,” said Senator Christopher J. Dodd, the Connecticut Democrat who presided over one recent hearing. “They were sophisticated investors who took enormous, irresponsible risks.”

The anger peaked over the weekend when correspondence surfaced showing that A.I.G. was on the brink of paying rich bonuses to executives who had dealt in the derivative contracts at the center of A.I.G.’s troubles.