PENSION AND OTHER POSTRETIREMENT BENEFITS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amounts recognized in Consolidated Balance Sheet [Abstract]
Postretirement benefit obligations other than pensions		$ (344,000,000)	$ (512,000,000)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Total recognized in other comprehensive (income) loss			(847,000,000)	$ 336,000,000
Other Postretirement Benefits for Significant Plans [Member]
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	$ 364,000,000	530,000,000	492,000,000
Service cost		0	0	0
Interest cost		15,000,000	19,000,000	20,000,000
Plan amendments		(34,000,000)	91,000,000
Actuarial (gains) losses		(110,000,000)	(14,000,000)
Benefits paid - OPEB		(37,000,000)	(58,000,000)
Benefit obligation at end of year		364,000,000	530,000,000	492,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	0	0	0
Actual return on plan assets		0	0
Company contributions		0	0
Benefits paid - OPEB		0	0
Fair value of plan assets at end of year		0	0	0
Funded status of plans		(364,000,000)	(530,000,000)
Amounts recognized in Consolidated Balance Sheet [Abstract]
Accrued Liabilities - Current		(62,000,000)	(62,000,000)
Postretirement benefit obligations other than pensions		(302,000,000)	(468,000,000)
Net amount recognized		(364,000,000)	(530,000,000)
Foreign plans excluded from postretirement benefits other than pensions		42,000,000	44,000,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Prior service (credit) cost		(226,000,000)	(244,000,000)
Net actuarial (gain) loss		(4,000,000)	109,000,000
Net amount recognized		(230,000,000)	(135,000,000)
Defined Benefit Plan Disclosure [Abstract]
Service cost		0	0	0
Interest cost		15,000,000	19,000,000	20,000,000
Amortization of prior service (credit) cost		(52,000,000)	(58,000,000)	(76,000,000)
Recognition of actuarial losses		3,000,000	13,000,000	22,000,000
Net periodic benefit (income) cost		(34,000,000)	(26,000,000)	(34,000,000)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses		(110,000,000)	(14,000,000)	(31,000,000)
Prior service cost (credit)		(34,000,000)	91,000,000	27,000,000
Prior service credit recognized during year		52,000,000	58,000,000	76,000,000
Actuarial losses recognized during year		(3,000,000)	(13,000,000)	(22,000,000)
Total recognized in other comprehensive (income) loss		(95,000,000)	122,000,000	50,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss		(129,000,000)	96,000,000	16,000,000
Other Postretirement Benefits for Significant Plans [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Abstract]
Amortization of prior service (credit) cost	(62,000,000)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Net loss to be amortized	0
United States [Member]
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	16,141,000,000	18,151,000,000	17,414,000,000
Service cost		140,000,000	172,000,000	191,000,000
Interest cost		573,000,000	586,000,000	600,000,000
Plan amendments		0	0
Actuarial (gains) losses		(1,111,000,000)	1,234,000,000
Benefits paid		(1,137,000,000)	(1,146,000,000)
Settlements and curtailments		0	(109,000,000)
Foreign currency translation		0	0
Other		(475,000,000)	0
Benefit obligation at end of year		16,141,000,000	18,151,000,000	17,414,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	17,109,000,000	18,985,000,000	16,814,000,000
Actual return on plan assets		(303,000,000)	3,287,000,000
Company contributions		34,000,000	139,000,000
Benefits paid		(1,137,000,000)	(1,146,000,000)
Settlements and curtailments		0	(109,000,000)
Foreign currency translation		0	0
Other		(470,000,000)	0
Fair value of plan assets at end of year		17,109,000,000	18,985,000,000	16,814,000,000
Funded status of plans		968,000,000	834,000,000
Amounts recognized in Consolidated Balance Sheet [Abstract]
Other Assets		1,295,000,000	1,205,000,000
Accrued Liabilities - Current		(27,000,000)	(27,000,000)
Other Liabilities - Noncurrent		(300,000,000)	(344,000,000)
Net amount recognized		968,000,000	834,000,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Prior service (credit) cost		(218,000,000)	(268,000,000)
Net actuarial (gain) loss		860,000,000	248,000,000
Net amount recognized		642,000,000	(20,000,000)
Defined Benefit Plan Disclosure [Abstract]
Service cost		140,000,000	172,000,000	191,000,000
Interest cost		573,000,000	586,000,000	600,000,000
Expected return on plan assets		(1,426,000,000)	(1,262,000,000)	(1,226,000,000)
Amortization of prior service (credit) cost		(43,000,000)	(43,000,000)	(43,000,000)
Recognition of actuarial losses		0	41,000,000	27,000,000
Settlements and curtailments		0	18,000,000	0
Net periodic benefit (income) cost		(756,000,000)	(488,000,000)	(451,000,000)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses		619,000,000	(792,000,000)	121,000,000
Prior service cost (credit)		0	0	0
Prior service credit recognized during year		43,000,000	43,000,000	43,000,000
Actuarial losses recognized during year		0	(59,000,000)	(27,000,000)
Foreign currency translation		0	0	0
Total recognized in other comprehensive (income) loss		662,000,000	(808,000,000)	137,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss		(94,000,000)	(1,296,000,000)	(314,000,000)
United States [Member] | Scenario Forecast [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Net loss to be amortized	(42,000,000)
Non-U.S. Pension Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll forward]
Benefit obligation at beginning of year	6,182,000,000	7,019,000,000	6,483,000,000
Service cost		26,000,000	40,000,000	47,000,000
Interest cost		143,000,000	147,000,000	179,000,000
Plan amendments		30,000,000	(1,000,000)
Actuarial (gains) losses		(356,000,000)	(24,000,000)
Benefits paid		(264,000,000)	(253,000,000)
Settlements and curtailments		(9,000,000)	0
Foreign currency translation		(342,000,000)	614,000,000
Other		(65,000,000)	13,000,000
Benefit obligation at end of year		6,182,000,000	7,019,000,000	6,483,000,000
Change In Plan Assets [Roll forward]
Fair value of plan assets at beginning of year	6,481,000,000	7,151,000,000	6,120,000,000
Actual return on plan assets		(173,000,000)	539,000,000
Company contributions		137,000,000	161,000,000
Benefits paid		(264,000,000)	(253,000,000)
Settlements and curtailments		0	0
Foreign currency translation		(378,000,000)	569,000,000
Other		8,000,000	15,000,000
Fair value of plan assets at end of year		6,481,000,000	7,151,000,000	6,120,000,000
Funded status of plans		299,000,000	132,000,000
Amounts recognized in Consolidated Balance Sheet [Abstract]
Other Assets		1,094,000,000	944,000,000
Accrued Liabilities - Current		(12,000,000)	(12,000,000)
Other Liabilities - Noncurrent		(783,000,000)	(800,000,000)
Net amount recognized		299,000,000	132,000,000
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income [Abstract]
Prior service (credit) cost		20,000,000	(13,000,000)
Net actuarial (gain) loss		600,000,000	427,000,000
Net amount recognized		620,000,000	414,000,000
Defined Benefit Plan Disclosure [Abstract]
Service cost		26,000,000	40,000,000	47,000,000
Interest cost		143,000,000	147,000,000	179,000,000
Expected return on plan assets		(443,000,000)	(411,000,000)	(377,000,000)
Amortization of prior service (credit) cost		(1,000,000)	(1,000,000)	(3,000,000)
Recognition of actuarial losses		37,000,000	46,000,000	246,000,000
Settlements and curtailments		(3,000,000)	0	(7,000,000)
Net periodic benefit (income) cost		(241,000,000)	(179,000,000)	85,000,000
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive (Income) Loss [Abstract]
Actuarial (gains) losses		250,000,000	(153,000,000)	447,000,000
Prior service cost (credit)		30,000,000	(1,000,000)	0
Prior service credit recognized during year		4,000,000	1,000,000	10,000,000
Actuarial losses recognized during year		(37,000,000)	(46,000,000)	(246,000,000)
Foreign currency translation		(34,000,000)	43,000,000	(83,000,000)
Total recognized in other comprehensive (income) loss		213,000,000	(156,000,000)	128,000,000
Total recognized in net periodic benefit (income) cost and other comprehensive (income) loss		$ (28,000,000)	$ (335,000,000)	$ 213,000,000
Non-U.S. Pension Plans, Defined Benefit [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Abstract]
Amortization of prior service (credit) cost	$ 0