VARIABLE INTEREST ENTITIES - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents	$ 439	$ 137
Receivables	1,510	1,318
Materials and supplies, at average cost	536	512
Prepaid taxes and other	286	293
Total current assets	3,068	2,568
Property, plant and equipment, net	40,119	38,412
Goodwill	5,618	5,618
Investments	688	663
Regulatory assets	485	369
Other	778	1,137
TOTAL ASSETS	50,756	48,767
CURRENT LIABILITIES:
Currently payable long-term debt	2,027	1,250
Short-term borrowings	75	775
Accounts payable	1,520	1,362
Accrued interest	272	292
Accrued taxes	729	700
Other	221	241
Total current liabilities	5,473	5,386
Long-term debt and other long-term obligations	21,603	22,885
Accumulated deferred income taxes	5,492	4,530
Regulatory liabilities	916	1,214
Other	1,929	2,173
Total noncurrent liabilities	31,591	32,465
TOTAL LIABILITIES	37,064	37,851
Variable Interest Entity, Primary Beneficiary
CURRENT ASSETS:
Cash and cash equivalents	245	76
Receivables	90	88
Materials and supplies, at average cost	1	1
Prepaid taxes and other	23	23
Total current assets	359	188
Property, plant and equipment, net	10,875	10,227
Goodwill	224	224
Investments	19	19
Regulatory assets	33	16
Other	114	310
Total noncurrent assets	11,265	10,796
TOTAL ASSETS	11,624	10,984
CURRENT LIABILITIES:
Currently payable long-term debt	1,225	0
Short-term borrowings	0	0
Accounts payable	0	2
Accrued interest	70	63
Accrued taxes	290	262
Other	7	14
Total current liabilities	1,592	341
Long-term debt and other long-term obligations	5,241	5,275
Accumulated deferred income taxes	1,389	1,218
Regulatory liabilities	363	307
Other	24	285
Total noncurrent liabilities	7,017	7,085
TOTAL LIABILITIES	$ 8,609	$ 7,426