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Investments in Debt and Equity Securities (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Investments [Line Items]

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	111		$	―		$	―	$	105
Equity securities				1,560			13		3,280			1,132			19		2,837
Corporate debt securities				9			6		323			21			1		338
Municipal bonds				5			7		213			12			1		194
U.S. government bonds				14			8		712			24			1		625
Other debt securities				17			4		167			10			1		164
Total NDTF				1,605			38		4,806			1,199			23		4,263
Other Investments
Cash and cash equivalents				―			―		21			―			―		17
Equity securities				22			―		83			10			―		63
Corporate debt securities				1			2		178			2			―		381
Municipal bonds				2			2		80			4			1		70
U.S. government bonds				―			―		38			―			―		23
Other debt securities				―			1		92			1			―		86
Auction rate securities				―			7		25			―			6		29
Total Other Investments^(a)				25			12		517			17			7		669
Total Investments			$	1,630		$	50	$	5,323		$	1,216		$	30	$	4,932

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	185
Due after one through five years			394
Due after five through 10 years			434
Due after 10 years			790
Total		$	1,803

Schedule of Realized Gain (Loss)


	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions)			2013	2012				2013	2012
Realized gains		$	72	$	30		$	135	$	80
Realized losses			16		12			38		14

Duke Energy Carolinas [Member]

Schedule of Investments [Line Items]

Available-For-Sale Investments

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	46		$	―		$	―	$	40
Equity securities				828			5		1,790			600			5		1,592
Corporate debt securities				4			5		236			11			1		250
Municipal bonds				―			1		52			2			―		40
U.S. government bonds				5			4		396			10			―		304
Other debt securities				17			4		147			9			2		135
Total NDTF				854			19		2,667			632			8		2,361
Other Investments
Auction rate securities				―			1		3			―			1		3
Total Other Investments^(a)				―			1		3			―			1		3
Total Investments			$	854		$	20	$	2,670		$	632		$	9	$	2,364

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	23
Due after one through five years			175
Due after five through 10 years			223
Due after 10 years			410
Total		$	831

Schedule of Realized Gain (Loss)


	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions)			2013	2012				2013	2012
Realized gains		$	49	$	19		$	95	$	65
Realized losses			1		5			11		7

Progress Energy [Member]

Schedule of Investments [Line Items]

Available-For-Sale Investments

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	65		$	―		$	―	$	65
Equity securities				732			8		1,490			532			14		1,245
Corporate debt securities				5			1		87			9			―		89
Municipal bonds				5			6		161			11			1		154
U.S. government bonds				9			4		316			14			―		321
Other debt securities				―			―		20			1			―		28
Total NDTF				751			19		2,139			567			15		1,902
Other Investments
Cash and cash equivalents				―			―		21			―			―		17
Municipal bonds				1			1		36			3			―		40
Total Other Investments^(a)				1			1		57			3			―		57
Total Investments			$	752		$	20	$	2,196		$	570		$	15	$	1,959

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	14
Due after one through five years			162
Due after five through 10 years			150
Due after 10 years			294
Total		$	620

Schedule of Realized Gain (Loss)


	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions)			2013	2012				2013	2012
Realized gains		$	22	$	8		$	37	$	23
Realized losses			11		6			20		12

Duke Energy Progress [Member]

Schedule of Investments [Line Items]

Available-For-Sale Investments

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	30		$	―		$	―	$	55
Equity securities				472			7		985			337			11		811
Corporate debt securities				5			1		83			8			―		78
Municipal bonds				2			4		103			4			―		80
U.S. government bonds				8			3		225			13			―		241
Other debt securities				―			―		9			1			―		10
Total NDTF				487			15		1,435			363			11		1,275
Other Investments
Cash and cash equivalents				―			―		2			―			―		3
Total Other Investments^(a)				―			―		2			―			―		3
Total Investments			$	487		$	15	$	1,437		$	363		$	11	$	1,278

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	6
Due after one through five years			125
Due after five through 10 years			88
Due after 10 years			201
Total		$	420

Schedule of Realized Gain (Loss)


	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions)			2013	2012				2013	2012
Realized gains		$	7	$	4		$	15	$	14
Realized losses			2		2			6		5

Duke Energy Florida [Member]

Schedule of Investments [Line Items]

Available-For-Sale Investments

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
NDTF
Cash and cash equivalents			$	―		$	―	$	35		$	―		$	―	$	10
Equity securities				260			1		505			194			4		434
Corporate debt securities				―			―		4			1			―		11
Municipal bonds				3			2		58			7			―		74
U.S. government bonds				1			1		91			1			―		80
Other debt securities				―			―		11			1			―		18
Total NDTF				264			4		704			204			4		627
Other Investments
Cash and cash equivalents				―			―		4			―			―		1
Municipal bonds				1			1		37			3			―		40
Total Other Investments^(a)				1			1		41			3			―		41
Total Investments			$	265		$	5	$	745		$	207		$	4	$	668

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	8
Due after one through five years			37
Due after five through 10 years			62
Due after 10 years			94
Total		$	201

Schedule of Realized Gain (Loss)

	Three Months Ended September 30,					Nine Months Ended September 30,
(in millions)			2013	2012				2013		2012
Realized gains		$	14	$	4		$	22	$	9
Realized losses			9		4			13		7

Duke Energy Indiana [Member]

Schedule of Investments [Line Items]

Available-For-Sale Investments

		September 30, 2013								December 31, 2012
(in millions)		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value		Gross Unrealized Holding Gains			Gross Unrealized Holding Losses			Estimated Fair Value
Other Investments
Equity securities			$	19		$	―	$	60		$	9		$	―	$	50
Municipal bonds				―			1		28			1			―		28
Total Other Investments^(a)				19			1		88			10			―		78
Total Investments			$	19		$	1	$	88		$	10		$	―	$	78

(a)	These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.

Schedule of Maturity Dates for Debt Securities

(in millions)	September 30, 2013
Due in one year or less		$	2
Due after one through five years			21
Due after five through 10 years			4
Due after 10 years			1
Total		$	28

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details