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INCOME TAXES (Reserve for Unrecognized tax benefits, interest and penalties) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Decreases: |  |
Amount of unrecognized tax benefit that could impact provision for income taxes | $ 97 |
Amount of unrecognized tax benefit that could impact provision for income taxes, net of tax benefits | 49 |
Unrecognized Tax Benefits [Member] |  |
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items] |  |
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance | 138 | 146
Additions: |  |
Prior year tax positions | 18 | 17
Current year tax positions | 14 | 24
Acquisition of PXP | 5 |
Interest and penalties | 0 | 0
Decreases: |  |
Prior year tax positions | (37) | (37)
Current year tax positions | 0 | 0
Settlements with tax authorities | 0 | (11)
Lapse of statute of limitations | (28) | (1)
Interest and penalties | 0 | 0
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance | 110 | 138
Interest [Member] |  |
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items] |  |
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance | 31 | 34
Additions: |  |
Interest and penalties | 7 | 3
Decreases: |  |
Interest and penalties | (17) | (6)
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance | 21 | 31
Penalties [Member] |  |
Reserve for unrecognized tax benefits, interest and penalties, type [Line Items] |  |
Unrecognized Tax Benefits, Interest and Penalties, Beginning Balance | 0 | 0
Additions: |  |
Interest and penalties | 0 | 0
Decreases: |  |
Interest and penalties | 0 | 0
Unrecognized Tax Benefits, Interest and Penalties, Ending Balance | $ 0 | $ 0

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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate, net of tax benefits. + References No definition available. + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from acquisitions. + References No definition available. + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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