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Contingencies
6 Months Ended
Jun. 30, 2011
Contingencies [Abstract]  
Contingencies
M.  
Contingencies
   
Except as discussed in Management’s Discussion and Analysis – “Special Asbestos and Environmental Reserve Charge,” there have been no significant changes to the matters discussed and referred to in Note M – “Contingencies” of AFG’s 2010 Form 10-K covering property and casualty insurance reserves for claims related to environmental exposures, asbestos and other mass tort claims as well as environmental and occupational injury and disease claims of former subsidiary railroad and manufacturing operations.