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STOCKHOLDERS' EQUITY (Employee Stock Ownership Plan) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dow ESOP [Member]
Dec. 31, 2012
Dow ESOP [Member]
Dec. 31, 2011
Dow ESOP [Member]
Jun. 30, 2009
Rohm And Haas [Member]
Rohm and Haas ESOP [Member]
Apr. 02, 2009
Rohm And Haas [Member]
Rohm and Haas ESOP [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]              
Employee Stock Ownership Plan (ESOP), Shares in ESOP     37.4        
Debt of ESOP $ 44 $ 51         $ 78
Interest rate on debt of ESOP           9.80%  
ESOP, compensation expense     132 107 102    
Shares allocated to participants' accounts     14.8        
Number of released, but unallocated, shares     1.2        
Number of unearned shares     21.4        
Fair value of unearned shares     $ 951