Investments In Unconsolidated Affiliates And Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2011

Investments In Unconsolidated Affiliates And Related Party Transactions [Abstract]

Investments In Equity Method Unconsolidated Affiliates

	As of:
	December 31, 2011						December 31, 2010
	Domestic		International		Total		Domestic		International		Total
	(in millions)
U.S. Franchised Electric and Gas	$	5	$	—	$	5	$	5	$	—	$	5
Commercial Power		188		—		188		174		1		175
International Energy		—		91		91		—		83		83
Other		167		9		176		173		8		181
	$	360	$	100	$	460	$	352	$	92	$	444

Equity In Earnings Of Equity Method Unconsolidated Affiliates

	For the Years Ended:
	December 31, 2011						December 31, 2010						December 31, 2009
	Domestic		International		Total(a)		Domestic		International		Total(a)		Domestic			International		Total(a)
	(in millions)
U.S. Franchised Electric and Gas	$	—	$	—	$	—	$	—	$	—	$	—	$	(10	)	$	—	$	(10	)
Commercial Power		6		—		6		7		—		7		7			—		7
International Energy		—		145		145		—		102		102		—			72		72
Other		7		2		9		5		2		7		—			1		1
	$	13	$	147	$	160	$	12	$	104	$	116	$	(3	)	$	73	$	70

(a) Duke Energy's share of net earnings from these unconsolidated affiliates is reflected in the Consolidated Statements of Operations as Equity in Earnings of Unconsolidated Affiliates.

Summarized Combined Financial Information Of Equity Method Unconsolidated Affiliates

	As of December 31,
	2011			2010
	(in millions)
Balance Sheet
Current assets	$	492		$	413
Non-current assets		1,599			1,599
Current liabilities		(267	)		(242	)
Non-current liabilities		(225	)		(145	)
Net assets	$	1,599		$	1,625

	For the Years Ended December 31,
	2011		2010		2009
	(in millions)
Income Statement
Operating revenues	$	1,615	$	1,385	$	1,509
Operating expenses		865		924		1,252
Net income		607		430		257