FINANCIAL INSTRUMENTS (Income Statement) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Other income (expense), net	$ 9	$ (2)
Other Nonoperating Income (Expense)
Derivative [Line Items]
Hedged items (Long-term debt)	(16)	25
Other Nonoperating Income (Expense) | Fair Value Hedging
Derivative [Line Items]
Derivatives designated as hedging instruments	$ 16	$ (25)