Regulatory Assets and Liabilities (Tables)

6 Months Ended

Jun. 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)	June 30, 2013		December 31, 2012
Current:
Regulatory balancing accounts	$	709	$	502
Energy derivatives	94		70
Total Current	803		572
Long-term:
Deferred income taxes, net	2,759		2,663
Pensions and other postretirement benefits	1,119		1,550
Energy derivatives	990		900
Unamortized investments, net	363		507
San Onofre	1,584		—
Unamortized loss on reacquired debt	218		228
Nuclear-related investment, net	35		141
Regulatory balancing accounts	78		73
Other	348		360
Total Long-term	7,494		6,422
Total Regulatory Assets	$	8,297	$	6,994

Regulatory Liabilities Included on the Consolidated Balance Sheets

Regulatory liabilities included on the consolidated balance sheets are:

(in millions)	June 30, 2013		December 31, 2012
Current:
Regulatory balancing accounts	$	443	$	484
Other	50		52
Total Current	493		536
Long-term:
Costs of removal	2,791		2,731
Asset Retirement Obligations	853		1,385
Regulatory balancing accounts	1,183		1,091
Other	9		7
Total Long-term	4,836		5,214
Total Regulatory Liabilities	$	5,329	$	5,750