GENERAL INFORMATION AND OTHER FINANCIAL DATA - CONSOLIDATION (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity (losses) earnings, before income tax	$ (189)	$ 18		$ (184)	$ 21
(Loss) income before income taxes and equity (losses) earnings of unconsolidated subsidiaries	(1,109)	397	[1]	(442)	1,149	[1]
Equity losses, net of income tax	185	0		160	(8)
Equity (losses) earnings	$ (4)	18	[1]	$ (24)	13	[1]
As previously reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Equity (losses) earnings, before income tax		18			21
(Loss) income before income taxes and equity (losses) earnings of unconsolidated subsidiaries		415			1,170
Equity losses, net of income tax		$ 0			$ (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.