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DEBT (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Oct. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2017
Line of Credit Facility [Line Items] |  |  |  |
Repayments of debt |  | $ 400 | $ 0 |
Senior Notes with an Annual Fixed Interest Rate of 3.10% [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Face value of debt |  |  |  | $ 400
Annual fixed interest rate |  |  |  | 3.10%
Effective interest rate |  |  |  | 3.13%
Senior notes with an annual fixed interest rate of 5.95% [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Annual fixed interest rate | 5.95% |  |  |
Repayments of debt | $ 400 |  |  |
Interest Rate Contract [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Notional amounts |  |  |  | $ 200

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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