Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2015

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets Included on the Consolidated Balance Sheets

SCE's regulatory assets included on the consolidated balance sheets are:

	December 31,
(in millions)	2015		2014
Current:
Regulatory balancing accounts	$	382	$	1,088
Energy derivatives	159		159
Other	19		7
Total current	560		1,254
Long-term:
Deferred income taxes, net	3,757		3,405
Pensions and other postretirement benefits	849		1,218
Energy derivatives	1,027		850
Unamortized investments, net	182		255
San Onofre	1,043		1,288
Unamortized loss on reacquired debt	201		201
Regulatory balancing accounts	36		44
Environmental remediation	129		107
Other	288		244
Total long-term	7,512		7,612
Total regulatory assets	$	8,072	$	8,866

Regulatory Liabilities Included on the Consolidated Balance Sheets

SCE's regulatory liabilities included on the consolidated balance sheets are:

	December 31,
(in millions)	2015		2014
Current:
Regulatory balancing accounts	$	1,106	$	380
Other	22		21
Total current	1,128		401
Long-term:
Costs of removal	2,781		2,826
Recoveries in excess of ARO liabilities1	1,502		1,956
Regulatory balancing accounts	1,314		1,083
Other	79		24
Total long-term	5,676		5,889
Total regulatory liabilities	$	6,804	$	6,290

¹ Represents the cumulative differences between ARO expenses and amounts collected in rates primarily for the decommissioning of the SCE's nuclear generation facilities. Decommissioning costs recovered through rates are primarily placed in nuclear decommissioning trusts. This regulatory liability also represents the deferral of realized and unrealized gains and losses on the nuclear decommissioning trust investments (see Note 9).

Schedule of Regulatory Balancing Accounts

The following table summarizes the significant components of regulatory balancing accounts included in the above tables of regulatory assets and liabilities:

	December 31,
(in millions)	2015			2014
Asset (liability)
Energy resource recovery account	$	(439	)	$	1,028
New system generation balancing account	(171		)	35
Public purpose programs and energy efficiency programs	(683		)	(874		)
Base rate recovery balancing account	(319		)	(5		)
Tax accounting memorandum account and pole loading	(248		)	—
Greenhouse gas auction revenue	(75		)	(182		)
FERC balancing accounts	74			(32		)
Generator settlements	(4		)	(197		)
Other	(137		)	(104		)
Liability	$	(2,002	)	$	(331	)