X0303 5 2009-12-31 false 0 0 0000040211 GATX CORP GMT 0001020062 FRETZ DEBORAH M 1818 MARKET ST. PHILADELPHIA PA 19103 true false false false Common Stock 30016.2447 D This amount reflects shares purchased through the dividend reinvestment plan, in the amount of .0651 shares, which is the revinvestment of dividends from the one commemorative gift share given by the company in honor of GATX Corporation's centennial. Lisa M. Ibarra, by Power of Attorney on behalf of Deborah M. Fretz 2010-01-25