GENERAL INFORMATION AND OTHER FINANCIAL DATA - CONSOLIDATION (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity (losses) earnings, before income tax	$ (52)	$ 10		$ (236)	$ 31
Income (loss) before income taxes and equity earnings of unconsolidated subsidiaries	427	5	[1]	(15)	1,154	[1]
Equity losses, net of income tax	126	3		286	(5)
Equity earnings	$ 74	13	[1]	$ 50	26	[1]
As previously reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity (losses) earnings, before income tax		10			31
Income (loss) before income taxes and equity earnings of unconsolidated subsidiaries		15			1,185
Equity losses, net of income tax		$ 3			$ (5)

[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.