PENSION BENEFITS (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
United States, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 27,000,000	$ 24,000,000	$ 53,000,000	$ 49,000,000
Interest cost	76,000,000	115,000,000	153,000,000	230,000,000
Expected return on plan assets	(305,000,000)	(283,000,000)	(610,000,000)	(567,000,000)
Amortization of prior service (credit)	(11,000,000)	(10,000,000)	(22,000,000)	(21,000,000)
Net periodic benefit (income)	(213,000,000)	(154,000,000)	(426,000,000)	(309,000,000)
Non-US, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6,000,000	5,000,000	13,000,000	11,000,000
Interest cost	21,000,000	26,000,000	40,000,000	52,000,000
Expected return on plan assets	(89,000,000)	(81,000,000)	(176,000,000)	(165,000,000)
Amortization of prior service (credit)	0	0	0	0
Net periodic benefit (income)	$ (62,000,000)	$ (50,000,000)	$ (123,000,000)	$ (102,000,000)