Investments In Debt And Equity Securities (Tables)

6 Months Ended

Jun. 30, 2012

Unrealized Losses Of Available-For-Sale Debt And Equity Securities In A Continuous Loss Position

		June 30, 2012						December 31, 2011
				Unrealized		Unrealized				Unrealized		Unrealized
				Loss		Loss				Loss		Loss
				Position		Position				Position		Position
(in millions)		Fair Value		>12 months		<12 months		Fair Value		>12 months		<12 months
Duke Energy Carolinas NDTF
Equity Securities		$	117	$	7	$	11	$	111	$	4	$	12
Corporate Debt Securities			29		―		1		57		1		1
Municipal Bonds			21		―		―		―		―		―
U.S. Government Bonds			27		―		―		8		―		―
Other			78		―		1		113		1		3
Total Duke Energy Carolinas NDTF(a)		$	272	$	7	$	13	$	289	$	6	$	16
Duke Energy Indiana Grantor Trust
Equity Securities		$	8	$	―	$	1	$	8	$	―	$	1
Municipal Bonds			10		―		―		3		―		―
Total Duke Energy Indiana Grantor Trust(a)		$	18	$	―	$	1	$	11	$	―	$	1
Other Investments
Equity Securities		$	6	$	1	$	―	$	4	$	1	$	―
Corporate Debt Securities			243		―		―		201		1		―
Municipal Bonds			1		―		―		―		―		―
U.S. Government Bonds			12		―		―		―		―		―
Other			11		―		―		8		―		―
Auction Rate Securities(b)			41		9		―		71		17		―
Total Other Investments		$	314	$	10	$	―	$	284	$	19	$	―
Total Duke Energy Investments		$	604	$	17	$	14	$	584	$	25	$	17
(a)	Unrealized losses on investments within the Duke Energy Carolinas NDTF and Duke Energy Indiana grantor trust are deferred as regulatory assets pursuant to regulatory accounting treatment.
(b)	At June 30, 2012 and December 31, 2011, $6 million and $12 million of these securities, respectively, were held by Duke Energy
	Carolinas. The gross unrealized losses on these securities held by Duke Energy Carolinas which were in an unrealized loss position greater than 12 months were $1 million at June 30, 2012 and $3 million at December 31, 2011.

Summarizes The Maturity Date For Debt Securities

	The table below summarizes the maturity date for debt securities held by Duke Energy, Duke Energy Carolinas, and Duke Energy Indiana.
(in millions)		< 1 Year		1-5 Years		6-10 Years		Thereafter
Duke Energy(a)		$	164	$	345	$	212	$	471
Duke Energy Carolinas(a)		$	45	$	146	$	174	$	369
Duke Energy Indiana		$	―	$	21	$	5	$	2
(a)	Excludes auction rate securities based on the stated maturity date. See Note ##FVFAL for information about fair value measurements related to investments in auction rate debt securities.

Available-For-Sale Investments

	The estimated fair values of short-term and long-term investments for Duke Energy, Duke Energy Carolinas and Duke Energy
Indiana are as follows (in millions):
		June 30, 2012						December 31, 2011
(in millions)		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Estimated Fair Value
Duke Energy Carolinas NDTF
Equity Securities		$	522	$	17	$	1,470	$	443	$	16	$	1,337
Corporate Debt Securities			10		2		221		8		2		205
Municipal Bonds			2		―		73		2		―		51
U.S. Government Bonds			12		―		277		16		―		306
Other			4		1		163		4		4		161
Total Duke Energy Carolinas NDTF(a)		$	550	$	20	$	2,204	$	473	$	22	$	2,060
Duke Energy Indiana Grantor Trust
Equity Securities		$	7	$	1	$	46	$	5	$	1	$	46
Municipal Bonds			1		―		28		1		―		28
Total Duke Energy Indiana Grantor Trust(a)		$	8	$	1	$	74	$	6	$	1	$	74
Other Investments
Equity Securities		$	1	$	1	$	20	$	―	$	1	$	14
Corporate Debt Securities			2		―		295		1		1		241
Municipal Bonds			―		―		1		―		―		―
U.S. Government Bonds			―		―		28		1		―		21
Other			1		―		107		2		―		68
Auction Rate Securities(b)			―		9		41		―		17		71
Total Other Investments		$	4	$	10	$	492	$	4	$	19	$	415
Total Duke Energy Investments		$	562	$	31	$	2,770	$	483	$	42	$	2,549
(a)	Unrealized losses on investments within the Duke Energy Carolinas NDTF and Duke Energy Indiana grantor trust are deferred as regulatory assets pursuant to regulatory accounting treatment.
(b)	At June 30, 2012 and December 31, 2011, $6 million and $12 million of these securities were held by Duke Energy Carolinas, respectively. Gross unrealized holding gains on these securities held by Duke Energy Carolinas were insignificant at both June 30, 2012 and December 31, 2011. Gross unrealized holding losses on these securities held by Duke Energy Carolinas were $1 million at June 30, 2012 and $3 million at December 31, 2011.