Schedule Of Consolidated Debt (Long-Term Debt Financing Transactions) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	$ 7,923
Energy Holdings [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	44		95
Total Long-Term Debt	43		44
Nonrecourse debt	50
Cash dividends paid to PSEG	500
Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	2,353		2,767
Debt redeemed and retired	98
Total Long-Term Debt	2,040		2,685
Cash dividends paid to PSEG	600
Power [Member] | 5.00% Pollution Control Revenue Bond [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.00%
Total Long-Term Debt	66
PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	4,804		4,277
Total Long-Term Debt	4,566		4,693
PSE&G [Member] | 5.13% Secured MTN [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.125%
Repayments of long-term debt	300
PSE&G [Member] | 3.65% Secured MTN [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	3.65%
Debt Instrument, Face Amount	350
PSE&G [Member] | 5.45% Fixed Rate Pollution Control [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.45%
Debt Instrument, Maturity Date	Feb. 01, 2032
Debt Face Value	50
Payments For Transition Fundings I I Securitization Debt	205
Payments For Transition Fundings Securitization Debt	11
PSE&G [Member] | Weekly Reset Variable Rate Demand Bonds [Member]
Debt Instrument [Line Items]
Debt Face Value	50
PSE&G [Member] | 5.20% Fixed Rate Pollution Control [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.20%
Debt redeemed and retired	23
Debt Instrument, Maturity Date	Mar. 01, 2025
PSE&G [Member] | 3.95% Secured Medium Term Notes [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	3.95%
Debt Instrument, Face Amount	450
PSE&G [Member] | 3.80% Secured MTN [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	3.80%
Debt Instrument, Face Amount	400
PSE&G [Member] | 5.00% Secured MTN [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument	5.00%
Repayments of long-term debt	150
Senior Notes 5.00% Due On 2014 [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	0		250
Stated interest rate of debt instrument	5.00%
Pollution Control Notes 5.50% Due On 2020 [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	0		14
Stated interest rate of debt instrument	5.50%
Pollution Control Notes 5.85% Due On 2027 [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	0		19
Stated interest rate of debt instrument	5.85%
Pollution Control Notes 5.75% Due On 2031 [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	0		25
Stated interest rate of debt instrument	5.75%
Pollution Control Notes 5.75% Due On 2037 [Member] | Power [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	0		40
Stated interest rate of debt instrument	5.75%
Pollution Control Bonds Due On 2033 [Member] | PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Carrying Amount	$ 50	[1],[2]	$ 0	[1],[2]

[1] Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.

[2] The Pennsylvania Economic Development Authority (PEDFA) bond and The Pollution Control Financing Authority of Salem County bonds for Power and PSE&G, respectively, are variable rate bonds that are in weekly reset mode.