PENSION BENEFITS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Payments for Repurchase of Common Stock	$ 750,000,000	$ 940,000,000
United States, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Payments for Repurchase of Common Stock	100,000,000
Service cost	21,000,000	35,000,000
Interest cost	153,000,000	143,000,000
Expected return on plan assets	(279,000,000)	(357,000,000)
Amortization of prior service (credit)	(11,000,000)	(11,000,000)
Net periodic benefit (income)	(116,000,000)	(190,000,000)
Non-US, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6,000,000	7,000,000
Interest cost	36,000,000	37,000,000
Expected return on plan assets	(84,000,000)	(115,000,000)
Amortization of prior service (credit)	0	0
Net periodic benefit (income)	$ (42,000,000)	$ (71,000,000)