Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets (Tables) [Abstract]

Changes in Carrying Amount of Goodwill

	Utility		AEP River		AEP
	Operations		Operations		Consolidated
	(in millions)
Balance at December 31, 2009	$	37	$	39	$	76
Impairment Losses		-		-		-
Balance at December 31, 2010		37		39		76
Impairment Losses		-		-		-
Balance at December 31, 2011	$	37	$	39	$	76

Amortization Life, Gross Carrying Amount and Accumulated Amortization by Major Asset Class

		December 31,
		2011				2010
		Gross				Gross
	Amortization	Carrying		Accumulated		Carrying		Accumulated
	Life	Amount		Amortization		Amount		Amortization
	(in years)	(in millions)
Easements	10	$	2.2	$	2.2	$	2.2	$	2.2
Purchased Technology	10		10.9		10.9		10.9		9.7
Total		$	13.1	$	13.1	$	13.1	$	11.9