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           DERIVATIVE INSTRUMENTS AND RISK MANAGEMENT - Fair Values of Derivative Assets and Liabilities by Hedge Type (Detail) (Interest Expense, USD $) 
        In Millions, unless otherwise specified  | 
        12 Months Ended | |
|---|---|---|
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           Dec. 31, 2012 
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           Dec. 31, 2011 
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           Fixed-Rate Debt and Capital Leases 
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| Derivatives, Fair Value [Line Items] | ||
| Amount of Gain (Loss) Recognized in Income | $ (20) | $ (320) | 
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           Interest rate contracts 
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| Derivatives, Fair Value [Line Items] | ||
| Amount of Gain (Loss) Recognized in Income | $ 20 | $ 320 | 
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- Definition 
          The amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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