Financial Risk Management Activities (Schedule Of Derivative Instruments Designated As Cash Flow Hedges) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Operating Revenues (Effective Portion)	$ 2,318		$ 2,554		$ 2,310		$ 2,786		$ 2,406		$ 2,402		$ 2,098		$ 2,875		$ 9,968		$ 9,781		$ 11,079
Amount of gain (loss) attributed to cash flow hedges reclassified from AOCI into Earnings (effective portion)																	402		423		475
PSEG [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	(4)		28		80
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	(1)		1		(2)
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Energy Costs (Effective Portion)																	12		70		214
Power [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	(4)		28		80
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	(1)		1		(2)
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Operating Revenues (Effective Portion)	1,245	[1]	1,174	[1]	1,193	[1]	1,451	[1]	1,282	[1]	1,041	[1]	987	[1]	1,563	[1]	5,063		4,873		6,150
Amount of gain (loss) attributed to cash flow hedges reclassified from AOCI into Earnings (effective portion)																	116		132		175
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Energy Costs (Effective Portion)																	13		70		215
Operating Revenues [Member] | PSEG [Member] | Energy-Related Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	(4)		32		84
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	(1)		1		(2)
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Operating Revenues (Effective Portion)																	13		79		213
Operating Revenues [Member] | Power [Member] | Energy-Related Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	(4)		32		84
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	(1)		1		(2)
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Operating Revenues (Effective Portion)																	13		79		213
Energy Costs [Member] | PSEG [Member] | Energy-Related Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	0		(4)		(4)
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	0		0		0
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Energy Costs (Effective Portion)																	0		(9)		2
Energy Costs [Member] | Power [Member] | Energy-Related Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	0		(4)		(4)
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	0		0		0
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Reclassified from AOCI into Energy Costs (Effective Portion)																	0		(9)		2
Interest Expense [Member] | PSEG [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Gain (Loss) attributed to Cash Flow Hedges Recognized in AOCI on Derivatives (Effective Portion)																	0	[2]	0	[2]	0	[2]
Amount of Pre-Tax Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion)																	0	[2]	0	[2]	0	[2]
Amount of gain (loss) attributed to cash flow hedges reclassified from AOCI into Earnings (effective portion)																	$ (1)	[2]	$ 0	[2]	$ (1)	[2]

[1] Power's information has been restated for all periods presented to reflect the transfer of certain of Energy Holdings' equity investments to Power on December 31, 2013. For additional information see Note 1. Organization, Basis of Presentation and Summary of Significant Accounting Policies.

[2] Includes amounts for PSEG parent.