EMPLOYEE BENEFIT PLANS (Reconciliation of Changes in Plan Assets Benefit Obligations and Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Funded Status:
Noncurrent liability	$ (231)	$ (860)
Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	21,895	20,759
Actual return on plan assets	(4,916)	1,693
Company contributions	339	335
Benefits and expenses paid	(949)	(892)
Fair value of plan assets at end of year	16,369	21,895	$ 20,759
Change in benefit obligation:
Benefit obligation at beginning of year	22,759	23,172
Service cost for benefits earned	575	587	530
Interest cost	692	645	713
Actuarial gain	(6,471)	(752)
Plan amendments	0	0
Benefits and expenses paid	(947)	(893)
Benefit obligation at end of year	16,608	22,759	23,172
Funded Status:
Current liability	(8)	(9)
Noncurrent liability	(231)	(856)
Net (liability) asset at end of year	(239)	(865)
Accumulated benefit obligation	15,400	20,400
PBOP Plans
Change in plan assets:
Fair value of plan assets at beginning of year	3,102	2,995
Actual return on plan assets	(693)	193
Company contributions	26	10
Plan participant contribution	81	80
Benefits and expenses paid	(180)	(176)
Fair value of plan assets at end of year	2,336	3,102	2,995
Change in benefit obligation:
Benefit obligation at beginning of year	1,766	1,876
Service cost for benefits earned	62	63	61
Interest cost	53	51	63
Actuarial gain	(486)	(152)
Benefits and expenses paid	(162)	(156)
Federal subsidy on benefits paid	3	4
Plan participant contributions	81	80
VSP related termination benefits	22	0
Benefit obligation at end of year	1,339	1,766	$ 1,876
Funded Status:
Noncurrent asset	997	1,340
Noncurrent liability	0	(4)
Net (liability) asset at end of year	997	1,336
PBOP Plans | Postretirement Life Insurance Plan
Change in plan assets:
Fair value of plan assets at beginning of year	359
Fair value of plan assets at end of year	266	359
Change in benefit obligation:
Benefit obligation at beginning of year	363
Benefit obligation at end of year	$ 259	$ 363