FINANCIAL INSTRUMENTS (Summary of Notional Amounts) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2018	Dec. 31, 2017
4.25% Senior Notes due April 2024 [Member]
Derivative [Line Items]
Debt instrument, interest rate	4.25%
Debt instrument, maturity date	Apr. 01, 2024
3.50% Senior Notes due March 2025 [Member]
Derivative [Line Items]
Debt instrument, interest rate	3.50%
Debt instrument, maturity date	Mar. 30, 2025
3.45% Senior Notes due June 2026 [Member]
Derivative [Line Items]
Debt instrument, interest rate	3.45%
Debt instrument, maturity date	Jun. 30, 2026
Interest Rate Swaps [Member] \| Fair Value Hedging [Member]
Derivative [Line Items]
Notional Amount	$ 1,200	$ 1,200
Interest Rate Swaps [Member] \| Fair Value Hedging [Member] \| 4.25% Senior Notes due April 2024 [Member]
Derivative [Line Items]
Notional Amount	250	250
Interest Rate Swaps [Member] \| Fair Value Hedging [Member] \| 3.50% Senior Notes due March 2025 [Member]
Derivative [Line Items]
Notional Amount	600	600
Interest Rate Swaps [Member] \| Fair Value Hedging [Member] \| 3.45% Senior Notes due June 2026 [Member]
Derivative [Line Items]
Notional Amount	$ 350	$ 350

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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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

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ 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)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

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