X0303 4 2011-05-04 false 0000040211 GATX CORP GMT 0001310741 Earl James F FOUR EMBARCADERO CENTER SAN FRANCISCO CA 94111 false true false false EVP and Chief Oper. Officer Common Stock 401(k) 8349.575 I 401(k) Plan Common Stock 2011-05-04 4 M false 10300 24.365 A 37838.0685 D Common Stock 2011-05-04 4 S false 508 41.55 D 37330.0685 D Common Stock 2011-05-04 4 S false 433 41.61 D 36897.0685 D Common Stock 2011-05-04 4 S false 800 41.6 D 36097.0685 D Common Stock 2011-05-04 4 S false 617 41.62 D 35480.0685 D Common Stock 2011-05-04 4 S false 400 41.63 D 35080.0685 D Common Stock 2011-05-04 4 S false 500 41.64 D 34580.0685 D Common Stock 2011-05-04 4 S false 1131 41.65 D 33449.0685 D Common Stock 2011-05-04 4 S false 400 41.66 D 33049.0685 D Common Stock 2011-05-04 4 S false 300 41.69 D 32749.0685 D Common Stock 2011-05-04 4 S false 145 41.7 D 32604.0685 D Common Stock 2011-05-04 4 S false 100 41.72 D 32504.0685 D Common Stock 2011-05-04 4 S false 800 41.73 D 31704.0685 D Common Stock 2011-05-04 4 S false 216 41.74 D 31488.0685 D Common Stock 2011-05-04 4 S false 100 41.745 D 31388.0685 D Common Stock 2011-05-04 4 S false 150 41.75 D 31238.0685 D Common Stock 2011-05-04 4 S false 200 41.76 D 31038.0685 D Common Stock 2011-05-04 4 S false 300 41.77 D 30738.0685 D Common Stock 2011-05-04 4 S false 400 41.78 D 30338.0685 D Common Stock 2011-05-04 4 S false 200 41.79 D 30138.0685 D Common Stock 2011-05-04 4 S false 400 41.82 D 29738.0685 D Common Stock 2011-05-04 4 S false 100 41.83 D 29638.0685 D Common Stock 2011-05-04 4 S false 600 41.85 D 29038.0685 D Common Stock 2011-05-04 4 S false 100 41.86 D 28938.0685 D Common Stock 2011-05-04 4 S false 100 41.87 D 28838.0685 D Common Stock 2011-05-04 4 S false 100 41.91 D 28738.0685 D Common Stock 2011-05-04 4 S false 100 41.98 D 28638.0685 D Common Stock 2011-05-04 4 S false 400 41.99 D 28238.0685 D Common Stock 2011-05-04 4 S false 700 42 D 27538.0685 D 2004 NQ Stock Option (Right to Buy) 24.365 2011-05-04 4 M false 10300 0 D 2005-08-06 2011-08-06 Common Stock 10300 0 D Lisa M. Ibarra, by Power of Attorney on behalf of James F. Earl 2011-05-04