Regulatory Assets and Liabilities

6 Months Ended

Jun. 30, 2012

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets and Liabilities

Regulatory Assets and Liabilities

Regulatory Assets

Regulatory assets included on the consolidated balance sheets are:

(in millions)	June 30, 2012		December 31, 2011
Current:
Regulatory balancing accounts	$	351	$	223
Energy derivatives	227		264
Other	8		7
Total Current	586		494
Long-term:
Deferred income taxes – net	2,097		2,020
Pensions and other postretirement benefits	1,672		1,703
Energy derivatives	809		836
Unamortized investments - net	483		484
Unamortized loss on reacquired debt	238		249
Nuclear-related investment – net	149		156
Regulatory balancing accounts	92		69
Other	236		298
Total Long-term	5,776		5,815
Total Regulatory Assets	$	6,362	$	6,309

Regulatory Liabilities

Regulatory liabilities included on the consolidated balance sheets are:

(in millions)	June 30, 2012		December 31, 2011
Current:
Regulatory balancing accounts	$	712	$	661
Other	9		9
Total Current	721		670
Long-term:
Costs of removal	2,742		2,697
Asset Retirement Obligations	1,235		1,105
Regulatory balancing accounts	1,054		864
Other	7		4
Total Long-term	5,038		4,670
Total Regulatory Liabilities	$	5,759	$	5,340