PENSION AND POST RETIREMENT BENEFITS (Components of Accumulated Other Comprehensive Loss (Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	$ (451)	$ (219)
Actual returns on assets under (over) expected	(309)	(332)
Amortization of net actuarial gain (loss)	(32)	(27)
Amortization of prior service credits (costs)	(1)	(1)
Settlements	22	6
Other	0	(27)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(438)	(15)
Actual returns on assets under (over) expected	11	(26)
Amortization of net actuarial gain (loss)	2	(3)
Amortization of prior service credits (costs)	(3)	2
Settlements	0	0
Other	8	(2)
Discount rates | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(224)	181
Discount rates | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(117)	44
Demographic updates | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	76	(3)
Demographic updates | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	3	(11)
Mortality | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	19	(16)
Mortality | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	13	(4)
Per capita health care costs | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	0	0
Per capita health care costs | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(350)	(10)
Other | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(2)	0
Other | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(5)	(5)
Actuarial loss (gain) on benefit obligation | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	(131)	162
Actuarial loss (gain) on benefit obligation | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain) on benefit obligation	$ (456)	$ 14