Annual report pursuant to Section 13 and 15(d)

NET CHANGE IN OPERATING ASSETS AND LIABILITIES (Details)

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NET CHANGE IN OPERATING ASSETS AND LIABILITIES (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net change in operating assets and liabilities      
(Increase) decrease in trade accounts receivable $ (253)us-gaap_IncreaseDecreaseInAccountsReceivable $ 28us-gaap_IncreaseDecreaseInAccountsReceivable $ (33)us-gaap_IncreaseDecreaseInAccountsReceivable
(Increase) decrease in inventories 35us-gaap_IncreaseDecreaseInInventories (105)us-gaap_IncreaseDecreaseInInventories (286)us-gaap_IncreaseDecreaseInInventories
(Increase) decrease in prepaid expenses and other assets 194us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (163)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (29)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Increase (decrease) in accounts payable and accrued expenses (250)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (158)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (556)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Increase (decrease) in accrued taxes 151us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable 22us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable 770us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Increase (decrease) in other liabilities (316)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities (556)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities (946)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net change in operating assets and liabilities $ (439)us-gaap_IncreaseDecreaseInOperatingCapital $ (932)us-gaap_IncreaseDecreaseInOperatingCapital $ (1,080)us-gaap_IncreaseDecreaseInOperatingCapital