Regulatory Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets Included on the Consolidated Balance Sheets

Regulatory assets included on the consolidated balance sheets are:

(in millions)	September 30, 2013		December 31, 2012
Current:
Regulatory balancing accounts	$	344	$	502
Energy derivatives	162		70
Total current	506		572
Long-term:
Deferred income taxes, net	2,911		2,663
Pensions and other postretirement benefits	1,105		1,550
Energy derivatives	960		900
Unamortized investments, net	358		507
San Onofre	1,450		—
Unamortized loss on reacquired debt	213		228
Nuclear-related investment, net	34		141
Regulatory balancing accounts	626		73
Other	358		360
Total long-term	8,015		6,422
Total regulatory assets	$	8,521	$	6,994

Regulatory Liabilities Included on the Consolidated Balance Sheets

Regulatory liabilities included on the consolidated balance sheets are:

(in millions)	September 30, 2013		December 31, 2012
Current:
Regulatory balancing accounts	$	580	$	484
Other	49		52
Total current	629		536
Long-term:
Costs of removal	2,814		2,731
Asset retirement obligations	954		1,385
Regulatory balancing accounts	1,210		1,091
Other	11		7
Total long-term	4,989		5,214
Total regulatory liabilities	$	5,618	$	5,750