Financial Risk Management Activities (Tables)

12 Months Ended

Dec. 31, 2011

Financial Risk Management Activities [Abstract]

Schedule Of Derivative Transactions Designated And Effective As Cash Flow Hedges

	As of December 31,
	2011		2010
		Millions
Fair Value of Cash Flow Hedges	$	57	$	196
Impact on Accumulated Other Comprehensive Income (Loss) (after tax)	$	33	$	114

Schedule Of Derivative Instruments Fair Value In Balance Sheet

	As of December 31, 2011
	Power												PSE&G			PSEG			Consolidated
	Cash Flow Hedges			Non Hedges									Non Hedges			Fair Value Hedges
Balance Sheet Location	Energy- Related Contracts			Energy- Related Contracts			Netting (A)			Total Power			Energy- Related Contracts			Interest Rate Swaps			Total Derivatives
	Millions
Derivative Contracts
Current Assets	$	55		$	532		$	(448	)	$	139		$	0		$	17		$	156
Noncurrent Assets		8			121			(74	)		55			4			47			106
Total Mark-to-Market Derivative Assets	$	63		$	653		$	(522	)	$	194		$	4		$	64		$	262
Derivative Contracts
Current Liabilities	$	(5	)	$	(506	)	$	387		$	(124	)	$	(7	)	$	0		$	(131	)
Noncurrent Liabilities		(1	)		(76	)		53			(24	)		0			(2	)		(26	)
Total Mark-to-Market Derivative (Liabilities)	$	(6	)	$	(582	)	$	440		$	(148	)	$	(7	)	$	(2	)	$	(157	)
Total Net Mark-to-Market Derivative Assets (Liabilities)	$	57		$	71		$	(82	)	$	46		$	(3	)	$	62		$	105

	As of December 31, 2010
	Power												PSE&G			PSEG		Consolidated
	Cash Flow Hedges			Non Hedges									Non Hedges			FairValue Hedges
Balance Sheet Location	Energy- Related Contracts			Energy- Related Contracts			Netting (A)			Total Power			Energy- Related Contracts			Interest Rate Swaps		Total Derivatives
	Millions
Derivative Contracts
Current Assets	$	204		$	403		$	(444	)	$	163		$	0		$	19	$	182
Noncurrent Assets		3			80			(41	)		42			17			20		79
Total Mark-to-Market Derivative Assets	$	207		$	483		$	(485	)	$	205		$	17		$	39	$	261
Derivative Contracts
Current Liabilities	$	(11	)	$	(454	)	$	374		$	(91	)	$	(12	)	$	0	$	(103	)
Noncurrent Liabilities		0			(72	)		50			(22	)		0			0		(22	)
Total Mark-to-Market Derivative (Liabilities)	$	(11	)	$	(526	)	$	424		$	(113	)	$	(12	)	$	0	$	(125	)
Total Net Mark-to-Market Derivative Assets (Liabilities)	$	196		$	(43	)	$	(61	)	$	92		$	5		$	39	$	136

(A) Represents the netting of fair value balances with the same counterparty (where the right of offset exists) and the application of collateral. As of December 31, 2011 and December 31, 2010, net cash collateral received of $82 million and $61 million, respectively, was netted against the corresponding net derivative contract positions. Of the $82 million as of December 31, 2011, cash collateral of $(77) million and $(23) million were netted against current assets and noncurrent assets, respectively, and cash collateral of $16 million and $2 million were netted against current liabilities and noncurrent liabilities, respectively. Of the $61 million as of December 31, 2010, cash collateral of $(132) million and $(3) million were netted against current assets and noncurrent assets, respectively, and cash collateral of $62 million and $12 million were netted against current liabilities and noncurrent liabilities, respectively.

Schedule Of Derivative Instruments Designated As Cash Flow Hedges

Derivatives in Cash Flow Hedging Relationships	Amount of Pre-Tax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)								Location of Pre-Tax Gain (Loss) Reclassified from AOCI into Income	Amount of Pre-Tax Gain (Loss) Reclassified from AOCI into Income (Effective Portion)									Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)
	Years Ended December 31,									Years Ended December 31,									Years Ended December 31,
	2011			2010		2009				2011			2010			2009			2011			2010		2009
	Millions
PSEG (A)
Energy-Related Contracts	$	84		$	101	$	636		Operating Revenues	$	213		$	222		$	644		$	(2	)	$	1	$	(22	)
Interest Rate Swaps		0			0		0		Income from Equity Method Investments		0			0			(1	)		0			0		0
Energy-Related Contracts		(4	)		1		(45	)	Energy Costs		2			(2	)		(67	)		0			0		0
Interest Rate Swaps		0			0		(4	)	Interest Expense		(1	)		(1	)		(3	)		0			0		0
Total PSEG	$	80		$	102	$	587			$	214		$	219		$	573		$	(2	)	$	1	$	(22	)
Power
Energy-Related Contracts	$	84		$	101	$	636		Operating Revenues	$	213		$	222		$	644		$	(2	)	$	1	$	(22	)
Energy-Related Contracts		(4	)		1		(45	)	Energy Costs		2			(2	)		(67	)		0			0		0
Total Power	$	80		$	102	$	591			$	215		$	220		$	577		$	(2	)	$	1	$	(22	)
PSE&G
Interest Rate Swaps	$	0		$	0	$	(1	)	Interest Expense	$	0		$	0		$	(2	)	$	0		$	0	$	0
Total PSE&G	$	0		$	0	$	(1	)		$	0		$	0		$	(2	)	$	0		$	0	$	0
Energy Holdings
Interest Rate Swaps	$	0		$	0	$	0		Income from Equity Method Investments	$	0		$	0		$	(1	)	$	0		$	0	$	0
Total Energy Holdings	$	0		$	0	$	0			$	0		$	0		$	(1	)	$	0		$	0	$	0

(A) Includes amounts for PSEG parent.

Schedule Of Reconciliation For Derivative Activity Included In Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Income	Pre-Tax			After-Tax
	Millions
Balance as of December 31, 2009	$	305		$	180
Gain Recognized in AOCI (Effective Portion)		102			60
Less: Gain Reclassified into Income (Effective Portion)		(219	)		(129	)
Balance as of December 31, 2010	$	188		$	111
Gain Recognized in AOCI (Effective Portion)		80			47
Less: Gain Reclassified into Income (Effective Portion)		(214	)		(127	)
Balance as of December 31, 2011	$	54		$	31

Schedule Of Derivative Instruments Not Designated As Hedging Instruments And Impact On Results Of Operations

Derivatives Not Designated as Hedges	Location of Pre-Tax Gain (Loss) Recognized in Income on Derivatives	Pre-Tax Gain (Loss) Recognized in Income on Derivatives
		Years Ended December 31,
		2011			2010			2009
		Millions
PSEG and Power
Energy-Related Contracts	Operating Revenues	$	205		$	(53	)	$	128
Energy-Related Contracts	Energy Costs		(42	)		(9	)		(144	)
Derivatives in NDT Fund	Other Income		0			0			13
Total PSEG and Power		$	163		$	(62	)	$	(3	)

Schedule Of Gross Volume On Absolute Value Basis For Derivative Contracts

Type	Notional	Total		PSEG		Power		PSE&G
		Millions
As of December 31, 2011
Natural Gas	Dth		612		0		377		235
Electricity	MWh		137		0		137		0
Financial Transmission Rights (FTRs)	MWh		12		0		12		0
Interest Rate Swaps	US Dollars		1,100		1,100		0		0
Coal	Tons		1		0		1		0
As of December 31, 2010
Natural Gas	Dth		704		0		424		280
Electricity	MWh		154		0		154		0
Capacity	MW days		1		0		1		0
FTRs	MWh		23		0		23		0
Interest Rate Swaps	US Dollars		1,150		1,150		0		0

Schedule Providing Credit Risk From Others, Net Of Collateral

Rating	Current Exposure		Securities held as Collateral		Net Exposure		Number of Counterparties >10%		Net Exposure of Counterparties >10%
	Millions								Millions
Investment Grade—External Rating	$	702	$	83	$	699		2	$	427	(A)
Non-Investment Grade—External Rating		27		0		27		0		0
Investment Grade—No External Rating		9		0		9		0		0
Non-Investment Grade—No External Rating		1		0		1		0		0
Total	$	739	$	83	$	736		2	$	427

(A) Includes net exposure of $339 million with PSE&G. The remaining net exposure of $88 million is with one nonaffiliated power purchaser which is a regulated investment grade counterparty.