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DEBT (Debt Outstanding - Additional Information) (Details) - USD ($) |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 12, 2016 | Jun. 30, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |
Debt, long term |  | $ 2,960,000,000 | $ 1,196,800,000
Notes, 6.30%, due July 2017 |  |  |
Debt Instrument [Line Items] |  |  |
Debt, interest rate |  | 6.30% | 6.30%
Debt, maturity date |  | 2017-07 | 2017-07
Debt, long term |  | $ 272,500,000 | $ 272,500,000
Notes, 2.30%, due June 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, term | 5 years |  |
Debt, interest rate | 2.30% | 2.30% | 2.30%
Debt, maturity date |  | 2021-06 | 2021-06
Debt, long term | $ 500,000,000 | $ 500,000,000 | $ 0
Notes, 3.30%, due Dec. 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Debt, interest rate |  | 3.30% | 3.30%
Debt, maturity date |  | 2022-12 | 2022-12
Debt, long term |  | $ 500,000,000 | $ 500,000,000
Notes, 3.25%, due June 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, term | 10 years |  |
Debt, interest rate | 3.25% | 3.25% | 3.25%
Debt, maturity date |  | 2026-06 | 2026-06
Debt, long term | $ 275,000,000 | $ 275,000,000 | $ 0
Debentures, 6.90%, due July 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Debt, interest rate |  | 6.90% | 6.90%
Debt, maturity date |  | 2028-07 | 2028-07
Debt, long term |  | $ 125,000,000 | $ 125,000,000
Notes, 7.00%, due July 2037 |  |  |
Debt Instrument [Line Items] |  |  |
Debt, interest rate |  | 7.00% | 7.00%
Debt, maturity date |  | 2037-07 | 2037-07
Debt, long term |  | $ 250,000,000 | $ 250,000,000
Revolving Credit Facility |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, term |  | 5 years |

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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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