http://en.wikipedia.org/wiki/National_debt_of_the_United_States
On September 30, 2014, public debt held by the public had reached $12.8 trillion or about 74% of FY 2014 GDP[5][6][7] Intragovernmental holdings stood at $5.0 trillion, giving a combined total public debt of $17.8 trillion or about 103% of FY 2014 GDP.