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DEBT - Fair Value (Details) - USD ($) $ in Billions | Dec. 31, 2018 | Dec. 31, 2017
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Carrying Value Reported Value Measurement |  |
Debt Instrument [Line Items] |  |
Debt, long-term and short-term | $ 3.0 | $ 3.1
Estimate of Fair Value Measurement |  |
Debt Instrument [Line Items] |  |
Estimated market value of long-term and short-term debt |  | $ 3.3

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 + 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 Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
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