Fitch Ratings Service is downgrading various American International Group ratings, as the embattled insurer continues to make progress toward repaying U.S. taxpayers and repositioning itself in the marketplace.

Among the downgrades are the New York-based insurer's issuer default rating and the insurer financial strength ratings on the company's insurance subsidiaries. Fitch affirmed AIG's short-term issuer default rating and commercial paper ratings.

AIG has received $182.5 billion in financial support from the government since September. The company is selling off a number of business units to repay part of the loan.