FINANCIAL INSTRUMENTS (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Long-term Debt [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	[1]	$ (477)	$ (478)
Financial Instruments, Gross Unrealized Gains	[1]	0	0
Financial Instruments, Gross Unrealized Loss	[1]	(96)	(123)
Financial Instruments, Fair Value	[1]	(573)	(601)
Debt Securities [Member]
Financial Instruments [Line Items]
Financial Instruments, Cost	[2]	(4)	(5)
Financial Instruments, Gross Unrealized Gains	[2]	0	0
Financial Instruments, Gross Unrealized Loss	[2]	0	0
Financial Instruments, Fair Value	[2]	$ (4)	$ (5)

[1] Presented in accordance with newly implemented ASU 2015-03. See Note 2 for further information.

[2] Marketable securities are included in “Other investments” in the consolidated balance sheets.