SAN FRANCISCO (MarketWatch) -- American International Group Inc. AIG, -1.23% has made a final $1.5 billion payment to retire the Treasury's interest in AIA Aurora LLC, the insurance company said late Thursday. AIA Aurora is a special purpose vehicle created to hold ordinary shares of American International Assurance Co. "This $1.5 billion payment is a milestone," said Chief Executive Robert Benmosche in a statement. The payment was made a year ahead of schedule. "During the financial crisis, overall support for AIG through Treasury and the Federal Reserve Bank of New York totaled approximately $182 billion. With today's repayment, the government's remaining outstanding investment is now $45 billion, which represents a more than 75% reduction from that original commitment," said the Treasury in a separate statement.