. net worth is defined as the sum of common stock , paid-in capital and retained earnings , less treasury stock plus any cumulative goodwill impairment charges . the calcu- lation also excludes accumulated other compre- hensive loss . the total-debt-to-capital ratio is defined as total debt divided by the sum of total debt plus net worth . at december 31 , 2009 , international paper 2019s net worth was $ 11.8 billion , and the total- debt-to-capital ratio was 43.3% ( 43.3 % )