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Regulatory Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2016
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)
2016
 
2015
Current:
 
 
 
Regulatory balancing accounts
$
135

 
$
382

Energy derivatives
150

 
159

Unamortized investments, net
49

 
—

Other
16

 
19

Total current
350

 
560

Long-term:
 
 
 
Deferred income taxes, net
4,478

 
3,757

Pensions and other postretirement benefits
710

 
849

Energy derivatives
947

 
1,027

Unamortized investments, net
80

 
182

San Onofre
857

 
1,043

Unamortized loss on reacquired debt
184

 
201

Regulatory balancing accounts
66

 
36

Environmental remediation
126

 
129

Other
7

 
288

Total long-term
7,455

 
7,512

Total regulatory assets
$
7,805


$
8,072
Regulatory Liabilities Included on the Consolidated Balance Sheets
SCE's regulatory liabilities included on the consolidated balance sheets are:
 
December 31,
(in millions)
2016
 
2015
Current:
 
 
 
Regulatory balancing accounts
$
736

 
$
1,106

Other
20

 
22

Total current
756

 
1,128

Long-term:
 
 
 
Costs of removal
2,847

 
2,781

Recoveries in excess of ARO liabilities
1,639

 
1,502

Regulatory balancing accounts
1,180

 
1,314

Other
60

 
79

Total long-term
5,726

 
5,676

Total regulatory liabilities
$
6,482

 
$
6,804
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)
2016
 
2015
Asset (liability)
 
 
 
 Energy resource recovery account
$
(20
)
 
$
(439
)
 New system generation balancing account
(6
)
 
(171
)
 Public purpose programs and energy efficiency programs
(992
)
 
(683
)
 Base revenue requirement balancing account
(426
)
 
(319
)
 Tax accounting memorandum account and pole loading
(142
)
 
(248
)
    DOE litigation memorandum account1
(122
)
 
—

 Greenhouse gas auction revenue
31

 
(75
)
 FERC balancing accounts
(69
)
 
74

 Other
31

 
(141
)
Liability
$
(1,715
)
 
$
(2,002
)

1 Represents proceeds from the Department of Energy ("DOE") resulting from its failure to meet its obligation to begin accepting spent nuclear fuel from San Onofre. Damages recovered are subject to CPUC review as to how these amounts would be distributed among customers, shareholders, or to offset fuel decommissioning or storage costs. See Note 11 for further discussion.