PENSION BENEFITS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Payments for Repurchase of Common Stock			$ 2,650,000,000	$ 1,704,000,000
United States, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Payments for Repurchase of Common Stock	$ 100,000,000		200,000,000
Service cost	21,000,000	$ 35,000,000	42,000,000	70,000,000
Interest cost	154,000,000	144,000,000	307,000,000	287,000,000
Expected return on plan assets	(279,000,000)	(357,000,000)	(558,000,000)	(714,000,000)
Amortization of prior service (credit)	(11,000,000)	(11,000,000)	(22,000,000)	(22,000,000)
Net periodic benefit (income)	(115,000,000)	(189,000,000)	(231,000,000)	(379,000,000)
Non-US, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6,000,000	7,000,000	12,000,000	14,000,000
Interest cost	36,000,000	36,000,000	72,000,000	73,000,000
Expected return on plan assets	(83,000,000)	(113,000,000)	(167,000,000)	(228,000,000)
Amortization of prior service (credit)	0	(1,000,000)	0	(1,000,000)
Net periodic benefit (income)	$ (41,000,000)	$ (71,000,000)	$ (83,000,000)	$ (142,000,000)