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Organization And Basis Of Presentation (Tables)

12 Months Ended

Dec. 31, 2012

Organization And Basis Of Presentation [Line Items]

	December 31,
(in millions)	2012		2011
Duke Energy	$	574	$	104
Duke Energy Carolinas		—		—
Progress Energy		11		35
Progress Energy Carolinas		—		—
Progress Energy Florida		—		—
Duke Energy Ohio		—		30
Duke Energy Indiana		—		—

Components Of Inventory

		December 31, 2012
(in millions)		Duke Energy		Duke Energy Carolinas		Progress Energy		Progress Energy Carolinas		Progress Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Materials and supplies		$	1,751	$	574	$	768	$	499	$	269	$	142	$	164
Coal held for electric generation			1,468		488		673		329		344		82		216
Natural gas			4		—		—		—		—		3		—
	Total inventory	$	3,223	$	1,062	$	1,441	$	828	$	613	$	227	$	380

		December 31, 2011
(in millions)		Duke Energy		Duke Energy Carolinas		Progress Energy		Progress Energy Carolinas		Progress Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Materials and supplies		$	873	$	505	$	747	$	446	$	301	$	150	$	134
Coal held for electric generation			712		412		681		323		358		90		196
Natural gas			3		—		1		1		—		3		—
	Total inventory	$	1,588	$	917	$	1,429	$	770	$	659	$	243	$	330

Schedule Of Composite Weighted-Average Depreciation Rates

	Years Ended December 31,
	2012		2011		2010
Duke Energy	2.9	%	3.2	%	3.2	%
Duke Energy Carolinas	2.8	%	2.6	%	2.7	%
Progress Energy	2.6	%	2.3	%	2.0	%
Progress Energy Carolinas	2.7	%	2.1	%	2.1	%
Progress Energy Florida	2.5	%	2.4	%	1.9	%
Duke Energy Ohio	3.2	%	3.5	%	4.1	%
Duke Energy Indiana	3.3	%	3.4	%	3.5	%

Schedule of Excise Taxes

	For the Years Ended December 31,
(in millions)		2012		2011		2010
Duke Energy	$	466	$	293	$	300
Duke Energy Carolinas		161		153		156
Progress Energy		317		315		345
Progress Energy Carolinas		113		110		119
Progress Energy Florida		205		205		226
Duke Energy Ohio		102		109		115
Duke Energy Indiana		33		31		29

Schedule Of Unbilled Revenues With Restricted Receivables

	December 31,
(in millions)	2012		2011
Duke Energy	$	920	$	674
Duke Energy Carolinas		315		293
Progress Energy		187		157
Progress Energy Carolinas		112		102
Progress Energy Florida		74		55
Duke Energy Ohio		47		50
Duke Energy Indiana		3		2

Schedule of Unbilled Revenues Sold to CRC

	December 31,
(in millions)	2012		2011
Duke Energy Ohio	$	90	$	89
Duke Energy Indiana		132		115

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Schedule of Net Income Amounts Attributable to Controlling Interests


			Year Ended December 31, 2012
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,732	$	348
	Discontinued operations, net of tax			36		52
		Net income attributable to controlling interests	$	1,768	$	400

			Year Ended December 31, 2011
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,705	$	580
	Discontinued operations, net of tax			1		(5)
		Net income attributable to controlling interests	$	1,706	$	575

			Year Ended December 31, 2010
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,317	$	860
	Discontinued operations, net of tax			3		(4)
		Net income attributable to controlling interests	$	1,320	$	856

Duke Energy Carolinas [Member]

Organization And Basis Of Presentation [Line Items]

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Progress Energy [Member]

Organization And Basis Of Presentation [Line Items]

Restricted Cash

	December 31,
(in millions)	2012		2011
Duke Energy	$	574	$	104
Duke Energy Carolinas		—		—
Progress Energy		11		35
Progress Energy Carolinas		—		—
Progress Energy Florida		—		—
Duke Energy Ohio		—		30
Duke Energy Indiana		—		—

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Schedule of Net Income Amounts Attributable to Controlling Interests


			Year Ended December 31, 2012
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,732	$	348
	Discontinued operations, net of tax			36		52
		Net income attributable to controlling interests	$	1,768	$	400

			Year Ended December 31, 2011
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,705	$	580
	Discontinued operations, net of tax			1		(5)
		Net income attributable to controlling interests	$	1,706	$	575

			Year Ended December 31, 2010
(in millions)			Duke Energy		Progress Energy
Net Income Amounts Attributable to Controlling Interests
	Income from continuing operations, net of tax		$	1,317	$	860
	Discontinued operations, net of tax			3		(4)
		Net income attributable to controlling interests	$	1,320	$	856

Progress Energy Carolinas [Member]

Organization And Basis Of Presentation [Line Items]

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Progress Energy Florida [Member]

Organization And Basis Of Presentation [Line Items]

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Duke Energy Ohio [Member]

Organization And Basis Of Presentation [Line Items]

Restricted Cash

	December 31,
(in millions)	2012		2011
Duke Energy	$	574	$	104
Duke Energy Carolinas		—		—
Progress Energy		11		35
Progress Energy Carolinas		—		—
Progress Energy Florida		—		—
Duke Energy Ohio		—		30
Duke Energy Indiana		—		—

Schedule of Unbilled Revenues Sold to CRC

	December 31,
(in millions)	2012		2011
Duke Energy Ohio	$	90	$	89
Duke Energy Indiana		132		115

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

Duke Energy Indiana [Member]

Organization And Basis Of Presentation [Line Items]

Schedule of Unbilled Revenues Sold to CRC

	December 31,
(in millions)	2012		2011
Duke Energy Ohio	$	90	$	89
Duke Energy Indiana		132		115

Schedule of Current and Noncurrent Assets and Liabilities

			December 31,
(in millions)		Location	2012		2011
Duke Energy
Accrued compensation		Current Liabilities	$	725	$	407
Duke Energy Carolinas
Accrued compensation		Current Liabilities	$	203	$	163
Collateral liabilities^(a)		Current Liabilities		105		94
Progress Energy
Customer deposits		Current Liabilities	$	342	$	340
Accrued compensation^(a)		Current Liabilities		304		155
Derivative liabilities		Current Liabilities		221		382
Progress Energy Carolinas
Customer deposits		Current Liabilities	$	120	$	116
Accrued compensation^(a)		Current Liabilities		160		82
Derivative liabilities^(b)		Current Liabilities		94		123
Progress Energy Florida
Customer deposits		Current Liabilities	$	222	$	224
Accrued compensation^(a)		Current Liabilities		95		49
Derivative liabilities		Current Liabilities		127		220
Duke Energy Ohio
Collateral assets^(a)		Current Assets	$	99	$	31
Duke Energy Indiana
Derivative liabilities^(a)		Current Liabilities	$	63	$	1

(a)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2011.
(b)	Does not exceed 5% of Total current assets or Total current liabilities at December 31, 2012.

- Definition

Tabular disclosure of the cash and cash items which are restricted as to withdrawal or usage. The provisions of any restrictions are described in a note to the financial statements. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits.

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