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DEBT (Senior Notes Offering) (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016 | May 31, 2016 | Mar. 31, 2015
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Unamortized discount | $ 11,000,000 |  |  |
Debt issuance costs | $ 20,000,000 | $ 24,000,000 |  |
3.45% Senior Notes due June 2026 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount of debt |  |  | $ 500,000,000 |
Debt instrument, interest rate | 3.45% |  | 3.45% |
Unamortized discount |  |  | $ 1,000,000 |
Debt issuance costs |  |  | $ 4,000,000 |
2015 Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount of debt |  |  |  | $ 1,200,000,000.0
Debt issuance costs |  |  |  | 11,000,000
2.50% Senior Notes due March 2020 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount of debt |  |  |  | $ 300,000,000
Debt instrument, interest rate | 2.50% |  |  | 2.50%
Unamortized discount |  |  |  | $ 1,000,000
3.50% Senior Notes due March 2025 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount of debt |  |  |  | $ 600,000,000
Debt instrument, interest rate | 3.50% |  |  | 3.50%
4.70% Senior Notes due March 2045 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Face amount of debt |  |  |  | $ 300,000,000
Debt instrument, interest rate | 4.70% |  |  | 4.70%

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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 Amount, after accumulated amortization, of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 + Details
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