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FINANCIAL INSTRUMENTS (Summary of Notional Amounts) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
3.20% Senior Notes due April 2016 [Member] |  |  |
Derivative [Line Items] |  |  |
Debt instrument, interest rate | 3.20% |  |
Debt instrument, maturity date | Apr. 01, 2016 |  |
3.20% Senior Notes due April 2016 [Member] | Six-Month LIBOR [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 2.30% |  |
4.75% Senior Notes due January 2020 [Member] |  |  |
Derivative [Line Items] |  |  |
Debt instrument, interest rate | 4.75% |  |
Debt instrument, maturity date | Jan. 30, 2020 |  |
4.75% Senior Notes due January 2020 [Member] | One-Month LIBOR [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 3.60% |  |
4.70% Senior Notes due April 2021 [Member] |  |  |
Derivative [Line Items] |  |  |
Debt instrument, interest rate | 4.70% |  |
Debt instrument, maturity date | Apr. 01, 2021 |  |
4.70% Senior Notes due April 2021 [Member] | One-Month LIBOR [Member] | Minimum [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 2.45% |  |
4.70% Senior Notes due April 2021 [Member] | One-Month LIBOR [Member] | Maximum [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 3.39% |  |
4.25% Senior Notes due April 2024 [Member] |  |  |
Derivative [Line Items] |  |  |
Debt instrument, interest rate | 4.25% |  |
Debt instrument, maturity date | Apr. 01, 2024 |  |
4.25% Senior Notes due April 2024 [Member] | One-Month LIBOR [Member] | Minimum [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 1.54% |  |
4.25% Senior Notes due April 2024 [Member] | One-Month LIBOR [Member] | Maximum [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 1.59% |  |
3.50% Senior Notes due March 2025 [Member] |  |  |
Derivative [Line Items] |  |  |
Debt instrument, interest rate | 3.50% | 3.50% |
Debt instrument, maturity date | Mar. 30, 2025 |  |
3.50% Senior Notes due March 2025 [Member] | One-Month LIBOR [Member] |  |  |
Derivative [Line Items] |  |  |
Floating Rate | 1.44% |  |
Fair Value Hedging [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 1,200 |  | $ 1,200
Fair Value Hedging [Member] | 3.20% Senior Notes due April 2016 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | 0 |  | 200
Fair Value Hedging [Member] | 4.75% Senior Notes due January 2020 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | 350 |  | 350
Fair Value Hedging [Member] | 4.70% Senior Notes due April 2021 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | 400 |  | 400
Fair Value Hedging [Member] | 4.25% Senior Notes due April 2024 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | 250 |  | 250
Fair Value Hedging [Member] | 3.50% Senior Notes due March 2025 [Member] |  |  |
Derivative [Line Items] |  |  |
Notional Amount | $ 200 |  | $ 0

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