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           RELATED PARTY TRANSACTIONS (Tables) 
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        12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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           Dec. 31, 2012 
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| RELATED PARTY TRANSACTIONS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of transactions with affiliates | 
 Our accompanying consolidated financial statements include the following transactions with our affiliates not otherwise disclosed (dollars in millions): 
 
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- Definition 
          Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. No definition available. 
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