PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Defined Benefit Pension Plans) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ 1,268
Increase (Decrease) in Obligation, Pension Benefits	345
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	$ 19
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)		$ 8,433	$ 820
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		0	18	$ (9)
Employer contributions		235	$ 1,219
Expected pension contributions		$ 150
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate - benefit obligations		5.18%	2.57%	2.20%
Discount rate - net periodic costs		2.57%	2.40%	2.81%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate		4.19%	3.57%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate		3.57%	3.55%	3.51%
Rate of compensation increase - benefit obligations		4.05%	3.94%
Rate of compensation increase - net periodic costs		3.94%	3.91%	3.92%
Expected return on plan assets - net periodic costs		6.68%	6.86%	7.00%
UNITED STATES
Defined Benefit Plan, Assumptions Used in Calculations [Abstract]
Discount rate - benefit obligations		5.64%	3.04%
Discount rate - net periodic costs		3.04%	3.03%	3.41%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate		4.50%	4.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate		4.50%	4.50%	4.50%
Rate of compensation increase - benefit obligations		4.25%	4.25%
Rate of compensation increase - net periodic costs		4.25%	4.25%	4.25%
Expected return on plan assets - net periodic costs		7.95%	7.96%	7.95%