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COMMON STOCK AND DIVIDENDS (Details)
 12 Months Ended
Dec. 31, 2017
Vote
$ / shares
shares
Dec. 31, 2016
Vote
$ / shares
shares
Dec. 31, 2015
Vote
$ / shares
shares
Common stock structure and shares [Abstract]      
Amount of common stock, subscribed, issued, paid in, and authorized for public offer (in shares) 794,495,283 794,495,283 794,495,283
Number of shares represents for each share on New York Stock Exchange (in shares) 5    
Class "A" [Member]      
Common stock structure and shares [Abstract]      
Amount of common stock, subscribed, issued, paid in, and authorized for public offer (in shares)   405,192,594 405,192,594
Face amount of common shares (in dollars per share) | $ / shares $ 1 $ 1 $ 1
Number of votes for common stock | Vote 1 1 1
Class "B" [Member]      
Common stock structure and shares [Abstract]      
Amount of common stock, subscribed, issued, paid in, and authorized for public offer (in shares)   389,302,689 389,302,689
Face amount of common shares (in dollars per share) | $ / shares $ 1 $ 1 $ 1
Number of votes for common stock | Vote 1 1 1