FAIR VALUE MEASUREMENTS - Summary of Financial Instruments at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash	$ 494	$ 268	$ 418	$ 781
Short-term investments	213	177
Net derivative contracts	148	86
Long-term debt converted to floating interest rates by interest rate swaps - net	(172)	(94)
Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash	494	268
Short-term investments	213	177
Net derivative contracts	0	0
Long-term debt converted to floating interest rates by interest rate swaps - net	0	0
Level 2 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash	0	0
Short-term investments	0	0
Net derivative contracts	148	86
Long-term debt converted to floating interest rates by interest rate swaps - net	(172)	(94)
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Financial Statement Captions [Line Items]
Cash	0	0
Short-term investments	0	0
Net derivative contracts	0	0
Long-term debt converted to floating interest rates by interest rate swaps - net	$ 0	$ 0