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IMPAIRMENTS - NONRECURRING FAIR VALUE MEASUREMENTS (DETAILS) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Impairment Losses      
Property, plant and equipment, impairment losses $ (15) $ (103) $ (22)
Goodwill impairment (13) (2)  
Investment in affiliates impairment losses (14) (5)  
Non-current assets held for sale impairment losses   (13) (2)
Level 3 | Non-recurring fair value measurements      
Carrying Value / Fair Value      
Property, plant and equipment 12 165 4
Investment in affiliates 3 17  
Non-current assets held for sale   33 1
Carrying Value      
Carrying Value / Fair Value      
Property, plant and equipment 12 165 4
Investment in affiliates $ 3 17  
Non-current assets held for sale   $ 33 $ 1