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EQUITY AND NONCONTROLLING INTEREST - EQUITY AND NONCONTROLLING INTEREST NARRATIVE (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
vote
$ / shares
shares
Dec. 31, 2018
shares
Dec. 31, 2017
shares
Class of Stock [Line Items]          
Common and preferred shares authorized (shares)   1,055,000,000 1,055,000,000    
Preferred stock, shares authorized (shares)   5,000,000 5,000,000    
Retirement of treasury common stock | $     $ 0    
Common stock, shares, outstanding (shares)   208,829,433 208,829,433 209,728,904 210,860,817
Preferred Stock, Par or Stated Value Per Share | $ / shares   $ 1 $ 1    
Treasury Common Stock          
Class of Stock [Line Items]          
Retirement of treasury common stock | $     $ 6,423,267,000    
Retained Earnings          
Class of Stock [Line Items]          
Retirement of treasury common stock | $     $ (6,284,919,000)    
Noncontrolling Interests in Subsidiaries | Lotte Shanghai Food Company          
Class of Stock [Line Items]          
Noncontrolling interest, ownership percentage by parent   50.00% 50.00%    
Common stock          
Class of Stock [Line Items]          
Common stock, shares authorized (shares)   900,000,000 900,000,000    
Common stock, par (USD per share) | $ / shares   $ 1 $ 1    
Common stock, voting rights (vote) | vote     1    
Dividends, common sock, cash, additional percentage over Class B common stock dividends     10.00%    
Retirement of treasury common stock (shares)     138,348,719 0 0
Treasury Stock, Shares, Acquired     1,386,193 1,406,093 0
Common Stock Voting Rights, Board Election Percentage     16.66%    
Common stock | Hershey Trust Company          
Class of Stock [Line Items]          
Common stock, shares, outstanding (shares)   123,600 123,600    
Class B common stock          
Class of Stock [Line Items]          
Common stock, shares authorized (shares)   150,000,000 150,000,000    
Common stock, voting rights (vote) | vote     10    
Conversion of stock     0 6,000 0
Class B common stock | Hershey Trust Company          
Class of Stock [Line Items]          
Common stock, shares, outstanding (shares)   60,612,012 60,612,012    
Common stock, voting percentage     80.00%    
Hershey Trust Company          
Class of Stock [Line Items]          
Treasury Stock, Shares, Acquired 1,500,000 450,000      
Treasury Stock Acquired, Average Cost Per Share | $ / shares $ 106.01 $ 106.30      
Stock Repurchased During Period, Value | $ $ 159,015,000 $ 47,835,000