PENSION BENEFITS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
United States, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 26,000,000	$ 25,000,000
Interest cost	77,000,000	115,000,000
Expected return on plan assets	(305,000,000)	(284,000,000)
Amortization of prior service (credit)	(11,000,000)	(11,000,000)
Net periodic benefit (income)	(213,000,000)	(155,000,000)
Non-US, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	7,000,000	6,000,000
Interest cost	19,000,000	26,000,000
Expected return on plan assets	(87,000,000)	(84,000,000)
Amortization of prior service (credit)	0	0
Net periodic benefit (income)	$ (61,000,000)	$ (52,000,000)