GENERAL INFORMATION AND OTHER FINANCIAL DATA - CONSOLIDATION (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity earnings, before income tax	$ 5	$ 3
Income before income taxes and equity losses of unconsolidated subsidiaries	667	752	[1]
Equity losses, net of income tax	(25)	(8)
Equity losses	$ (20)	(5)	[1]
As previously reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity earnings, before income tax		3
Income before income taxes and equity losses of unconsolidated subsidiaries		755
Equity losses, net of income tax		$ (8)

[1] As adjusted for the retrospective adoption of ASU 2017-07, which we discuss in Note 2, and a reclassification to conform to current year presentation, which we discuss in Note 1.