Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory assets

	December 31,
(in millions)	2022		2021
Current:
Regulatory balancing and memorandum accounts	$	2,400	$	1,591
Power contracts		71		168
Other		26		19
Total current		2,497		1,778
Long-term:
Deferred income taxes, net of liabilities		5,178		4,770
Power contracts		—		71
Unamortized investments, net of accumulated amortization		113		114
Unamortized loss on reacquired debt		109		121
Regulatory balancing and memorandum accounts		1,589		1,897
Environmental remediation		241		242
Recovery assets		834		325
Other		117		120
Total long-term		8,181		7,660
Total regulatory assets	$	10,678	$	9,438

Regulatory liabilities

	December 31,
(in millions)	2022		2021
Current:
Regulatory balancing and memorandum accounts	$	584	$	553
Energy derivatives		338		25
Other		42		25
Total current		964		603
Long-term:
Costs of removal		2,589		2,552
Re-measurement of deferred taxes		2,250		2,315
Recoveries in excess of ARO liabilities		1,231		2,155
Regulatory balancing and memorandum accounts		1,116		648
Pension and other postretirement benefits		1,007		1,281
Other		18		30
Total long-term		8,211		8,981
Total regulatory liabilities	$	9,175	$	9,584

Schedule of Regulatory Balancing Accounts

	December 31,
(in millions)	2022		2021
Asset (liability)
Energy resource recovery account	$	1,580	$	759
Portfolio allocation balancing account		(73)		(183)
New system generation balancing account		(63)		73
Public purpose programs and energy efficiency programs		(1,577)		(1,066)
Base revenue requirement balancing account		1,108		849
GRC wildfire mitigation balancing accounts1		67		12
Greenhouse gas auction revenue and low carbon fuel standard revenue		(289)		(298)
FERC balancing accounts		(123)		55
Wildfire and drought restoration accounts2		352		299
Wildfire-related memorandum accounts3		1,168		1,456
COVID-19-related memorandum accounts		67		94
Customer service re-platform memorandum account		64		128
Tax accounting memorandum account and pole loading balancing account		90		171
Excess bond and power charge balancing account		(56)		—
Other		(26)		(62)
Asset	$	2,289	$	2,287

1 The 2021 GRC decision approved the establishment of the vegetation management balancing account ("VMBA") to track vegetation management expenses up to 115% of amounts authorized, the Wildfire Risk Mitigation balancing account ("WRMBA") to track the costs of SCE's Wildfire Covered Conductor Program up to 110% of amounts authorized and the risk management balancing account to track the authorized costs of wildfire insurance. The amount recorded to these balancing accounts represents the difference between costs tracked in the balancing accounts and authorized revenues for those costs recorded to the base revenue requirement balancing account. If spending is less than authorized, SCE will refund those amounts to customers. If spending is within the specified threshold, if any, for each balancing account, SCE will recover those costs from customers. Amounts above the specified threshold, or above amounts authorized if a higher threshold was not established, for each balancing account may be eligible for deferral to wildfire-related memorandum accounts.

2 The wildfire and drought restoration accounts regulatory assets represent restoration costs that are recorded in a Catastrophic Event Memorandum Account ("CEMA").

3 The wildfire-related memorandum accounts regulatory assets represent wildfire-related costs that are probable of future recovery from customers, subject to a reasonableness review. The Fire Hazard Prevention Memorandum Account ("FHPMA") was used to track costs related to fire safety and to implement fire prevention corrective action measures in extreme and very high fire threat areas. The Wildfire Expense Memorandum Account ("WEMA") is used to track incremental wildfire insurance costs and uninsured wildfire-related financing, legal and claims costs related to the post-2018 wildfires that SCE believes are probable of recovery. See Note 12 for further details. The Wildfire Mitigation Plan Memorandum Account ("WMPMA") is used to track costs incurred to implement SCE's wildfire mitigation plan that are not currently reflected in SCE's revenue requirements. The Fire Risk Mitigation Memorandum Account ("FRMMA") is used to track costs related to the reduction of fire risk that are incremental to costs approved for recovery in SCE's GRCs that are not tracked in any other wildfire-related memorandum account. The balance also includes vegetation management spending in excess of the 115% threshold for the VMBA described above.