Risk Management Activities and Derivatives Transactions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011		Dec. 31, 2011
Risk Management Activities And Derivative Transactions Disclosure [Line Items]
Undesignated hedges termination dates					2,015
Notional amounts of derivative instruments related to interest rate
Cash flow hedges									$ 500
Undesignated contracts	100				100
Underlying notional amounts for commodity derivative instruments accounted for at fair value
Electricity-energy (Gigawatt-hours)	1,850	[1]			1,850	[1]
Electricity-capacity (Gigawatt-months)	5	[1]			5	[1]
Natural gas (millions of decatherms)	297,000,000				297,000,000				347,000,000
Fuel Oil (millions of gallons)	6,000,000				6,000,000				10,000,000
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	23				23				5
Location and fair value amounts of derivatives (Liability)	457				457				799
Fair Value Of Derivative Instruments Parenthetical Information
CVO's in connection with the acquisition of Florida Progress during 2000	98.6				98.6				98.6
CVO's repurchased in connection with the negotiated settlement agreement and subsequent tender offer	83.4				83.4				80.1
Information regarding derivative instruments that contain credit-risk-related contingent features
Aggregate fair value amounts of derivative instruments in a net liability position	325				325				489
Collateral already posted	74				74				147
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period	251				251				342
Information regarding cash collateral under master netting arrangements
Amounts offset against net derivative positions (right to reclaim cash collateral)	73				73				140
Amounts not offset against net derivative positions (right to reclaim cash collateral)	1				1				3
PEC [Member]
Risk Management Activities And Derivative Transactions Disclosure [Line Items]
Undesignated hedges termination dates					2,015
Notional amounts of derivative instruments related to interest rate
Cash flow hedges									250
Undesignated contracts	50				50
Underlying notional amounts for commodity derivative instruments accounted for at fair value
Electricity-energy (Gigawatt-hours)	1,850	[1]			1,850	[1]
Electricity-capacity (Gigawatt-months)	5	[1]			5	[1]
Natural gas (millions of decatherms)	89,000,000				89,000,000				103,000,000
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	5				5				0
Location and fair value amounts of derivatives (Liability)	159				159				248
Information regarding derivative instruments that contain credit-risk-related contingent features
Aggregate fair value amounts of derivative instruments in a net liability position	118				118				152
Collateral already posted	13				13				24
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period	105				105				128
Information regarding cash collateral under master netting arrangements
Amounts offset against net derivative positions (right to reclaim cash collateral)	13				13				23
Amounts not offset against net derivative positions (right to reclaim cash collateral)	0				0				0
PEF [Member]
Risk Management Activities And Derivative Transactions Disclosure [Line Items]
Undesignated hedges termination dates					2,015
Notional amounts of derivative instruments related to interest rate
Cash flow hedges									50
Undesignated contracts	50				50
Underlying notional amounts for commodity derivative instruments accounted for at fair value
Natural gas (millions of decatherms)	208,000,000				208,000,000				244,000,000
Fuel Oil (millions of gallons)	6,000,000				6,000,000				10,000,000
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	18				18				5
Location and fair value amounts of derivatives (Liability)	294				294				499
Information regarding derivative instruments that contain credit-risk-related contingent features
Aggregate fair value amounts of derivative instruments in a net liability position	207				207				337
Collateral already posted	61				61				123
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered at the end of the reporting period	146				146				214
Information regarding cash collateral under master netting arrangements
Amounts offset against net derivative positions (right to reclaim cash collateral)	60				60				117
Amounts not offset against net derivative positions (right to reclaim cash collateral)	1				1				3
Derivatives Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	1				1				96
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	1		(112)		(10)		(135)
Location of pre-tax gains (losses) reclassified from OCI into income	(2)		(3)		(12)		(9)
Location of pre-tax gains (losses) recognized in income on derivatives	0		(1)		0		(3)
Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	0				0				47
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	0		(58)		(7)		(67)
Location of pre-tax gains (losses) reclassified from OCI into income	0		(2)		(5)		(5)
Location of pre-tax gains (losses) recognized in income on derivatives	0		(1)		0		(1)
Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	1				1				11
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	1		(28)		(1)		(36)
Location of pre-tax gains (losses) reclassified from OCI into income	0		0		(2)		0
Location of pre-tax gains (losses) recognized in income on derivatives	0		0		0		0
Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	23				23				5
Location and fair value amounts of derivatives (Liability)	456				456				703
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(148)		(91)		(408)		(219)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	62		(157)		(106)		(201)
Location of pre-tax gains and (losses) recognized in income on derivatives	(1)		(62)		10		(57)
Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	5				5				0
Location and fair value amounts of derivatives (Liability)	159				159				201
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(47)		(20)		(112)		(42)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	17		(42)		(32)		(55)
Location of pre-tax gains and (losses) recognized in income on derivatives	0		1		3		2
Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	18				18				5
Location and fair value amounts of derivatives (Liability)	293				293				488
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(101)		(71)		(296)		(177)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	45		(115)		(74)		(146)
Location of pre-tax gains and (losses) recognized in income on derivatives	0		0		0		0
Interest Rate Derivatives [Member] | PEC [Member]
Risk Management Activities And Derivative Transactions Disclosure [Line Items]
Pre-tax deferred net losses related to interest rate hedges relcassed from AOCI to regulatory assets	117				117
Interest Rate Derivatives [Member] | PEF [Member]
Risk Management Activities And Derivative Transactions Disclosure [Line Items]
Pre-tax deferred net losses related to interest rate hedges relcassed from AOCI to regulatory assets	42				42
Interest Rate Derivatives [Member] | Derivatives Designated As Hedging Instruments [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Amount of pre-tax gains (losses) recorded in AOCI	71				71				232
Next 12 months amount to reclass to interest expense					5
Interest Rate Derivatives [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Amount of pre-tax gains (losses) recorded in AOCI									116
Interest Rate Derivatives [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Amount of pre-tax gains (losses) recorded in AOCI									41
Interest Rate Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	0	[2],[3]	(111)	[2],[3]	(11)	[2],[3]	(134)	[2],[3]
Interest Rate Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	0	[2],[3]	(58)	[2],[3]	(7)	[2],[3]	(67)	[2],[3]
Interest Rate Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	0	[2],[3]	(27)	[2],[3]	(2)	[2],[3]	(35)	[2],[3]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Designated As Hedging Instruments [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Location of pre-tax gains (losses) reclassified from OCI into income	(2)	[2],[3]	(3)	[2],[3]	(12)	[2],[3]	(9)	[2],[3]
Location of pre-tax gains (losses) recognized in income on derivatives	0	[3],[4]	(1)	[3],[4]	0	[3],[4]	(3)	[3],[4]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Location of pre-tax gains (losses) reclassified from OCI into income	0	[2],[3]	(2)	[2],[3]	(5)	[2],[3]	(5)	[2],[3]
Location of pre-tax gains (losses) recognized in income on derivatives	0	[3],[4]	(1)	[3],[4]	0	[3],[4]	(1)	[3],[4]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Location of pre-tax gains (losses) reclassified from OCI into income	0	[2],[3]	0	[2],[3]	(2)	[2],[3]	0	[2],[3]
Location of pre-tax gains (losses) recognized in income on derivatives	0	[3],[4]	0	[3],[4]	0	[3],[4]	0	[3],[4]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(4)	[5]	0	[5]	(4)	[5]	0	[5]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(3)	[5]	0	[5]	(3)	[5]	0	[5]
Interest Rate Derivatives [Member] | Interest Expense [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(1)	[5]	0	[5]	(1)	[5]	0	[5]
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									76
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									38
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									0
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	23	[6]			23	[6]
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	11	[6]			11	[6]
Interest Rate Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	12	[6]			12	[6]
Interest Rate Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									17
Interest Rate Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									9
Interest Rate Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									8
Interest Rate Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	2	[5]	0	[5]	2	[5]	0	[5]
Interest Rate Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	2	[5]	0	[5]	2	[5]	0	[5]
Interest Rate Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	0	[5]	0	[5]	0	[5]	0	[5]
Commodity Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	1	[2]	(1)	[2]	1	[2]	(1)	[2]
Commodity Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	0	[2]	0	[2]	0	[2]	0	[2]
Commodity Derivatives [Member] | Other Comprehensive Income (Loss) [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Cash flow hedges-location and amount of pre-tax gains and (losses)
Pre-tax gains (losses) recognized in OCI	1	[2]	(1)	[2]	1	[2]	(1)	[2]
Commodity Derivatives [Member] | Regulated electric revenue [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(9)				(9)
Location of pre-tax gains and (losses) recognized in income on derivatives					2		1
Commodity Derivatives [Member] | Regulated electric revenue [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(9)				(9)
Location of pre-tax gains and (losses) recognized in income on derivatives					2		1
Commodity Derivatives [Member] | Regulated electric revenue [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in income on derivatives					0		0
Commodity Derivatives [Member] | Cost Of Regulated Electric [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(135)	[7]	(91)	[7]	(395)	[7]	(219)	[7]
Commodity Derivatives [Member] | Cost Of Regulated Electric [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(35)	[7]	(20)	[7]	(100)	[7]	(42)	[7]
Commodity Derivatives [Member] | Cost Of Regulated Electric [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in earnings	(100)	[7]	(71)	[7]	(295)	[7]	(177)	[7]
Commodity Derivatives [Member] | Investments And Other Assets, Other [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	1	[6]			1	[6]
Commodity Derivatives [Member] | Investments And Other Assets, Other [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	0	[6]			0	[6]
Commodity Derivatives [Member] | Investments And Other Assets, Other [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	1	[6]			1	[6]
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	1				1				2
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	0				0				0
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	1				1				2
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	8	[6]			8	[6]			5	[6]
Location and fair value amounts of derivatives (Liability)	220	[6]			220	[6]			357	[6]
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	3	[6]			3	[6]			0	[6]
Location and fair value amounts of derivatives (Liability)	74	[6]			74	[6]			91	[6]
Commodity Derivatives [Member] | Derivative Liabilities, Current [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	5	[6]			5	[6]			5	[6]
Location and fair value amounts of derivatives (Liability)	146	[6]			146	[6]			266	[6]
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									1
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									0
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									1
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	14	[6]			14	[6]			0	[6]
Location and fair value amounts of derivatives (Liability)	209	[6]			209	[6]			332	[6]
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	2	[6]			2	[6]			0	[6]
Location and fair value amounts of derivatives (Liability)	74	[6]			74	[6]			110	[6]
Commodity Derivatives [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Asset)	12	[6]			12	[6]			0	[6]
Location and fair value amounts of derivatives (Liability)	135	[6]			135	[6]			222	[6]
Commodity Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	60	[8]	(157)	[8]	(108)	[8]	(201)	[8]
Commodity Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	15	[8]	(42)	[8]	(34)	[8]	(55)	[8]
Commodity Derivatives [Member] | Regulatory Asset [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEF [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized as regulatory assets or liabilities	45	[8]	(115)	[8]	(74)	[8]	(146)	[8]
CVOs [Member] | Other Income And Expense [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in income on derivatives	(1)		(63)		7		(59)
CVOs [Member] | Other Current Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)									14	[9]
CVOs [Member] | Deferred Credits And Other Liabilities [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Location and fair value of derivatives
Location and fair value amounts of derivatives (Liability)	4	[10]			4	[10]
Fair Value Loss Transition Adjustment [Member] | Regulated electric revenue [Member] | Derivatives Not Designated As Hedging Instruments [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in income on derivatives	0		1		1		1
Fair Value Loss Transition Adjustment [Member] | Regulated electric revenue [Member] | Derivatives Not Designated As Hedging Instruments [Member] | PEC [Member]
Undesignated contracts-location and amount of pre-tax gains and (losses)
Location of pre-tax gains and (losses) recognized in income on derivatives	$ 0		$ 1		$ 1		$ 1

[1] Interim FERC Mitigation power sales agreements entered into in connection with the merger with Duke Energy.

[2] Effective portion.

[3] Amounts in AOCI related to terminated hedges are reclassified to earnings as the interest expense is recorded. The effective portion of the hedges will be amortized to interest expense over the term of the related debt.

[4] Related to ineffective portion and amount excluded from effectiveness testing.

[5] Amounts in regulatory assets and liabilities related to terminated hedges are reclassified to earnings as the interest expense is recorded. The hedges will be amortized to interest expense over the term of the related debt.

[6] Substantially all of these contracts receive regulatory treatment.

[7] After settlement of the derivatives and the fuel is consumed, gains or losses are passed through the fuel cost-recovery clause.

[8] Amounts are recorded in regulatory assets and liabilities in the Balance Sheets until derivatives are settled.

[9] As discussed in Note 16 in the 2011 Form 10-K, the Parent issued 98.6 million CVOs in connection with the acquisition of Florida Progress during 2000. In 2011, we repurchased and continue to hold 80.1 million CVOs in a negotiated settlement agreement and subsequent tender offer.

[10] As discussed in Note 16 in the 2011 Form 10-K, the Parent issued 98.6 million Contingent Value Obligations (CVOs) in connection with the acquisition of Florida Progress Corporation (Florida Progress) during 2000. Through a negotiated settlement agreement and subsequent tender offer between October 2011 and February 2012, we repurchased and continue to hold 83.4 million CVOs.