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DEBT (Retirement of Debt) (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Apr. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2017
Other Nonoperating (Income) Expense [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Losses on extinguishment of debt |  |  |  | $ 48 | $ 144 |
6.95% Senior Notes due July 2037 and 5.75% Senior Notes due January 2040 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Extinguishment of debt, amount | $ 200 |  | $ 250 |  |  |
6.95% Senior Notes Due 2037 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Extinguishment of debt, amount | $ 73 |  | 176 |  |  |
Debt instrument, interest rate | 6.95% |  |  |  |  | 6.95%
5.75% Senior Notes Due 2040 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Extinguishment of debt, amount | $ 127 |  | $ 74 |  |  |
Debt instrument, interest rate | 5.75% |  |  |  |  | 5.75%
5.45% Senior Notes Due 2015 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate |  | 5.45% |  |  |  |
3.20% Senior Notes Due 2016 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Extinguishment of debt, amount |  | $ 150 |  |  |  |
Debt instrument, interest rate |  | 3.20% |  |  |  |
6.40% Senior Notes Due 2017 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, interest rate |  | 6.40% |  |  |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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