Regulatory Assets and Liabilities

3 Months Ended

Mar. 31, 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:

	March 31,		December 31,
(in millions)	2012		2011
Current:
Regulatory balancing accounts	$	362	$	223
Energy derivatives	320		264
Other	10		7
Total Current	692		494
Long-term:
Deferred income taxes – net	2,056		2,020
Pensions and other postretirement benefits	1,688		1,703
Energy derivatives	728		487
Unamortized investment – net	497		484
Unamortized loss on reacquired debt	244		249
Nuclear-related investment – net	152		156
Regulatory balancing accounts	84		69
Other	264		298
Total Long-term	5,713		5,466
Total Regulatory Assets	$	6,405	$	5,960

Regulatory Liabilities

Regulatory liabilities included on the consolidated balance sheets are:

	March 31,		December 31,
(in millions)	2012		2011
Current:
Regulatory balancing accounts	$	637	$	661
Other	8		9
Total Current	645		670
Long-term:
Costs of removal	2,736		2,697
Asset Retirement Obligations	1,322		1,105
Regulatory balancing accounts	1,039		864
Other	6		4
Total Long-term	5,103		4,670
Total Regulatory Liabilities	$	5,748	$	5,340