VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 888	$ 137
Receivables	1,365	1,318
Materials and supplies, at average cost	538	512
Prepaid taxes and other	491	293
Total current assets	4,063	2,568
Property, plant and equipment, net	38,804	38,412
Goodwill	5,618	5,618
Investments	688	663
Regulatory assets	333	369
Other	1,043	1,137
TOTAL ASSETS	51,299	48,767
CURRENT LIABILITIES:
Currently payable long-term debt	2,613	1,250
Short-term borrowings	250	775
Accounts payable	1,383	1,362
Accrued interest	305	292
Accrued taxes	823	700
Other	227	241
Total current liabilities	6,273	5,386
Long-term debt and other long-term obligations	21,652	22,885
Accumulated deferred income taxes	5,288	4,530
Regulatory liabilities	964	1,214
Other	1,846	2,173
Total noncurrent liabilities	31,413	32,465
TOTAL LIABILITIES	37,686	37,851
Variable Interest Entity, Primary Beneficiary
CURRENT ASSETS:
Cash and cash equivalents	77	76
Receivables	117	88
Materials and supplies, at average cost	1	1
Prepaid taxes and other	24	23
Total current assets	219	188
Property, plant and equipment, net	10,426	10,227
Goodwill	224	224
Investments	19	19
Regulatory assets	9	16
Other	234	310
Total noncurrent assets	10,912	10,796
TOTAL ASSETS	11,131	10,984
CURRENT LIABILITIES:
Currently payable long-term debt	600	0
Short-term borrowings	250	0
Accounts payable	0	2
Accrued interest	61	63
Accrued taxes	276	262
Other	7	14
Total current liabilities	1,194	341
Long-term debt and other long-term obligations	4,825	5,275
Accumulated deferred income taxes	1,289	1,218
Regulatory liabilities	342	307
Other	148	285
Total noncurrent liabilities	6,604	7,085
TOTAL LIABILITIES	$ 7,798	$ 7,426