GOODWILL (Tables)

12 Months Ended

Dec. 31, 2012

Schedule Of Goodwill

	2012						2011
	Gross Amount		Accumulated Impairment Losses		Carrying Amount		Gross Amount		Accumulated Impairment Losses		Carrying Amount
	(millions of dollars)
Beginning balance as of January 1	$	1,425	$	18	$	1,407	$	1,425	$	18	$	1,407
Impairment losses		—		—		—		—		—		—
Ending balance as of December 31	$	1,425	$	18	$	1,407	$	1,425	$	18	$	1,407

Delmarva Power & Light Co/De [Member]

Schedule Of Goodwill

	2012						2011
	Gross Amount		Accumulated Impairment Losses		Carrying Amount		Gross Amount		Accumulated Impairment Losses		Carrying Amount
	(millions of dollars)
Beginning balance as of January 1	$	8	$	—	$	8	$	8	$	—	$	8
Impairment losses		—		—		—		—		—		—
Ending balance as of December 31	$	8	$	—	$	8	$	8	$	—	$	8