FAIR VALUE MEASUREMENTS (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Assets:
Price risk management instruments, netting	$ 13	$ 42
Price risk management instruments, assets	409	456
TOTAL ASSETS	6,969	5,501
Liabilities:
Price risk management instruments, netting	(9)	(54)
TOTAL LIABILITIES	300	278
Amount primarily related to deferred taxes on appreciation of investment value	766	717
Short-term investments
Assets:
Short-term investments (2)	1,235	203
Short-term investments | Wildfire self-insurance
Assets:
Short-term investments (2)	608
Nuclear decommissioning trusts
Assets:
Short-term investments (2)	38	52
Global equity securities	2,248	2,144
Fixed-income securities	2,200	2,077
TOTAL ASSETS	4,506	4,291
Customer credit trust
Assets:
Short-term investments (2)	348	49
Global equity securities	49	71
Fixed-income securities	108	113
TOTAL ASSETS	505	233
Rabbi trusts
Assets:
Short-term investments (2)	105	102
Global equity securities	5	5
Life insurance contracts	66	65
TOTAL ASSETS	176	172
Long-term disability trust
Assets:
Short-term investments (2)	5	7
TOTAL ASSETS	138	146
Electricity
Assets:
Price risk management instruments, netting	2	(1)
Price risk management instruments, assets	381	410
Liabilities:
Price risk management instruments, netting	(4)	(6)
Price risk management instruments, liabilities	296	250
Gas
Assets:
Price risk management instruments, netting	11	43
Price risk management instruments, assets	28	46
Liabilities:
Price risk management instruments, netting	(5)	(48)
Price risk management instruments, liabilities	4	28
Level 1
Assets:
Price risk management instruments, gross subject to netting	0	0
TOTAL ASSETS	5,239	3,830
Liabilities:
TOTAL LIABILITIES	0	0
Level 1 | Short-term investments
Assets:
Short-term investments (2)	1,235	203
Level 1 | Nuclear decommissioning trusts
Assets:
Short-term investments (2)	38	52
Global equity securities	2,248	2,144
Fixed-income securities	1,185	1,168
TOTAL ASSETS	3,471	3,364
Level 1 | Customer credit trust
Assets:
Short-term investments (2)	348	49
Global equity securities	49	71
Fixed-income securities	21	29
TOTAL ASSETS	418	149
Level 1 | Rabbi trusts
Assets:
Short-term investments (2)	105	102
Global equity securities	5	5
Life insurance contracts	0	0
TOTAL ASSETS	110	107
Level 1 | Long-term disability trust
Assets:
Short-term investments (2)	5	7
TOTAL ASSETS	5	7
Level 1 | Electricity
Assets:
Price risk management instruments, gross subject to netting	0	0
Liabilities:
Price risk management instruments, gross subject to netting	0	0
Level 1 | Gas
Assets:
Price risk management instruments, gross subject to netting	0	0
Liabilities:
Price risk management instruments, gross subject to netting	0	0
Level 2
Assets:
Price risk management instruments, gross subject to netting	45	10
TOTAL ASSETS	1,213	1,068
Liabilities:
TOTAL LIABILITIES	116	119
Level 2 | Short-term investments
Assets:
Short-term investments (2)	0	0
Level 2 | Nuclear decommissioning trusts
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Fixed-income securities	1,015	909
TOTAL ASSETS	1,015	909
Level 2 | Customer credit trust
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Fixed-income securities	87	84
TOTAL ASSETS	87	84
Level 2 | Rabbi trusts
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Life insurance contracts	66	65
TOTAL ASSETS	66	65
Level 2 | Long-term disability trust
Assets:
Short-term investments (2)	0	0
TOTAL ASSETS	0	0
Level 2 | Electricity
Assets:
Price risk management instruments, gross subject to netting	28	7
Liabilities:
Price risk management instruments, gross subject to netting	107	43
Level 2 | Gas
Assets:
Price risk management instruments, gross subject to netting	17	3
Liabilities:
Price risk management instruments, gross subject to netting	9	76
Level 3
Assets:
Price risk management instruments, gross subject to netting	351	404
TOTAL ASSETS	351	404
Liabilities:
TOTAL LIABILITIES	193	213
Level 3 | Short-term investments
Assets:
Short-term investments (2)	0	0
Level 3 | Nuclear decommissioning trusts
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Fixed-income securities	0	0
TOTAL ASSETS	0	0
Level 3 | Customer credit trust
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Fixed-income securities	0	0
TOTAL ASSETS	0	0
Level 3 | Rabbi trusts
Assets:
Short-term investments (2)	0	0
Global equity securities	0	0
Life insurance contracts	0	0
TOTAL ASSETS	0	0
Level 3 | Long-term disability trust
Assets:
Short-term investments (2)	0	0
TOTAL ASSETS	0	0
Level 3 | Electricity
Assets:
Price risk management instruments, gross subject to netting	351	404
Liabilities:
Price risk management instruments, gross subject to netting	193	213
Level 3 | Gas
Assets:
Price risk management instruments, gross subject to netting	0	0
Liabilities:
Price risk management instruments, gross subject to netting	0	0
Assets measured at NAV | Nuclear decommissioning trusts
Assets:
Assets measured at NAV	20	18
Assets measured at NAV | Long-term disability trust
Assets:
Assets measured at NAV	$ 133	$ 139