Another day, but not just another bailout. This one’s a stunning government takeover.

In the most far-reaching intervention into the private sector ever for the Federal Reserve, the government stepped in Tuesday to rescue American International Group Inc. with an $85 billion injection of taxpayer money. Under the deal, the government will get a 79.9 percent stake in one of the world’s largest insurers and the right to remove senior management.

AIG’s chief executive, Robert Willumstad, is expected to be replaced by Edward Liddy, the former head of insurer Allstate Corp., according to The Wall Street Journal, citing a person it did not name. Willumstad had been at the helm of AIG since June.

A call to AIG to confirm the executive change was not immediately returned.

It was the second time this month the feds put taxpayer money on the hook to rescue a private financial company, saying its failure would further disrupt markets and threaten the already fragile economy.

AIG said it will repay the money in full with proceeds from the sales of some of its assets. It will be up to the company to decide which assets to sell and the timing. The government does, however, have veto power.

Under the deal, the Federal Reserve will provide a two-year $85 billion emergency loan at an interest rate of about 11.5 percent to AIG, which teetered on the edge of failure because of stresses caused by the collapse of the subprime mortgage market and the credit crunch that ensued. In return, the government will get a 79.9 percent stake in AIG and the right to remove senior management.

AIG shares sank $1.34, or 36 percent, to $2.41 in morning trading Wednesday. They traded as high as $70.13 in the past year.