Schedule Of Consolidated Debt (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified																12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended				12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended								12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended								12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended								12 Months Ended				12 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended								12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 PSEG [Member]		Dec. 31, 2011 PSEG [Member]		Dec. 31, 2012 Power [Member]	Dec. 31, 2011 Power [Member]	Dec. 31, 2012 PSE&G [Member]	Dec. 31, 2011 PSE&G [Member]	Dec. 31, 2012 PSE&G (Excluding Transition Funding and Transition Funding II) [Member]	Dec. 31, 2011 PSE&G (Excluding Transition Funding and Transition Funding II) [Member]	Dec. 31, 2012 Energy Holdings [Member]	Dec. 31, 2011 Energy Holdings [Member]	Sep. 30, 2009 Senior Notes 8.50% Due On 2011 [Member] Energy Holdings [Member]	Dec. 31, 2012 Senior Notes 2.50% Due On 2013 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 2.50% Due On 2013 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 5.00% Due On 2014 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 5.00% Due On 2014 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 5.50% Due On 2015 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 5.50% Due On 2015 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 5.32% Due On 2016 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 5.32% Due On 2016 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 2.75% Due On 2016 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 2.75% Due On 2016 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 5.13% Due On 2020 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 5.13% Due On 2020 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 4.15% Due On 2021 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 4.15% Due On 2021 [Member] Power [Member]	Dec. 31, 2012 Senior Notes 8.63% Due On 2031 [Member] Power [Member]	Dec. 31, 2011 Senior Notes 8.63% Due On 2031 [Member] Power [Member]	Dec. 31, 2012 Senior Notes [Member] Power [Member]	Dec. 31, 2011 Senior Notes [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes Floating Rate Due On 2014 [Member] Power [Member]		Dec. 31, 2011 Pollution Control Notes Floating Rate Due On 2014 [Member] Power [Member]		Dec. 31, 2012 Pollution Control Notes 5.00% Due On 2012 [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes 5.00% Due On 2012 [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes 5.50% Due On 2020 [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes 5.50% Due On 2020 [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes 5.85% Due On 2027 [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes 5.85% Due On 2027 [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes 5.75% Due On 2031 [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes 5.75% Due On 2031 [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes 5.75% Due On 2037 [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes 5.75% Due On 2037 [Member] Power [Member]	Dec. 31, 2012 Pollution Control Notes [Member] Power [Member]	Dec. 31, 2011 Pollution Control Notes [Member] Power [Member]	Dec. 31, 2012 First And Refunding Mortgage Bonds 6.75% Due On 2016 [Member] PSE&G [Member]		Dec. 31, 2011 First And Refunding Mortgage Bonds 6.75% Due On 2016 [Member] PSE&G [Member]		Dec. 31, 2012 First And Refunding Mortgage Bonds 9.25% Due On 2021 [Member] PSE&G [Member]		Dec. 31, 2011 First And Refunding Mortgage Bonds 9.25% Due On 2021 [Member] PSE&G [Member]		Dec. 31, 2012 First And Refunding Mortgage Bonds 8.00% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2011 First And Refunding Mortgage Bonds 8.00% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2012 First And Refunding Mortgage Bonds 5.00% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2011 First And Refunding Mortgage Bonds 5.00% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2012 First And Refunding Mortgage Bonds [Member] PSE&G [Member]		Dec. 31, 2011 First And Refunding Mortgage Bonds [Member] PSE&G [Member]		Dec. 31, 2012 Pollution Control Bonds 5.20% Due On 2025 [Member] PSE&G [Member]		Dec. 31, 2011 Pollution Control Bonds 5.20% Due On 2025 [Member] PSE&G [Member]		Dec. 31, 2012 Pollution Control Bonds 5.45% Due On 2032 [Member] PSE&G [Member]		Dec. 31, 2011 Pollution Control Bonds 5.45% Due On 2032 [Member] PSE&G [Member]		Dec. 31, 2012 Pollution Control Bonds Due On 2033 [Member] PSE&G [Member]		Dec. 31, 2011 Pollution Control Bonds Due On 2033 [Member] PSE&G [Member]		Dec. 31, 2012 Pollution Control Bonds Due On 2046 [Member] PSE&G [Member]		Dec. 31, 2011 Pollution Control Bonds Due On 2046 [Member] PSE&G [Member]		Dec. 31, 2012 Pollution Control Bonds [Member] PSE&G [Member]		Dec. 31, 2011 Pollution Control Bonds [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.13% Due On 2012 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.13% Due On 2012 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.00% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.00% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.38% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.38% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 6.33% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 6.33% Due On 2013 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 0.85% Due On 2014 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 0.85% Due On 2014 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.00% Due On 2014 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.00% Due On 2014 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 2.70% Due On 2015 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 2.70% Due On 2015 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.30% Due On 2018 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.30% Due On 2018 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 7.04% Due On 2020 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 7.04% Due On 2020 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 3.50% Due On 2020 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 3.50% Due On 2020 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.25% Due On 2035 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.25% Due On 2035 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.70% Due On 2036 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.70% Due On 2036 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.80% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.80% Due On 2037 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.38% Due On 2039 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.38% Due On 2039 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 5.50% Due On 2040 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 5.50% Due On 2040 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 3.95% Due On 2042 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 3.95% Due On 2042 [Member] PSE&G [Member]		Dec. 31, 2012 Medium-Term Notes 3.65% Due On 2042 [Member] PSE&G [Member]		Dec. 31, 2011 Medium-Term Notes 3.65% Due On 2042 [Member] PSE&G [Member]		Dec. 31, 2012 Total Medium Term Notes [Member] PSE&G [Member]		Dec. 31, 2011 Total Medium Term Notes [Member] PSE&G [Member]		Dec. 31, 2012 Non-Recourse Project Debt, Resources 5.00% - 8.75% Due 2011 - 2020 [Member] Energy Holdings [Member]		Dec. 31, 2011 Non-Recourse Project Debt, Resources 5.00% - 8.75% Due 2011 - 2020 [Member] Energy Holdings [Member]		Dec. 31, 2012 Non Recourse Project Debt, Other Resources Due 2012 [Member] Energy Holdings [Member]		Dec. 31, 2011 Non Recourse Project Debt, Other Resources Due 2012 [Member] Energy Holdings [Member]		Dec. 31, 2012 Transition Funding (PSE&G) [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding (PSE&G) [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding (PSE&G) [Member] Securitization Bonds 6.61% Due On 2011-2013 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding (PSE&G) [Member] Securitization Bonds 6.61% Due On 2011-2013 [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding (PSE&G) [Member] Securitization Bonds 6.75% Due On 2013-2014 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding (PSE&G) [Member] Securitization Bonds 6.75% Due On 2013-2014 [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding (PSE&G) [Member] Securitization Bonds 6.89% Due On 2014-2015 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding (PSE&G) [Member] Securitization Bonds 6.89% Due On 2014-2015 [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding (PSE&G) [Member] Transition Funding PSE&G [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding (PSE&G) [Member] Transition Funding PSE&G [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding II (PSE&G) [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding II (PSE&G) [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding II (PSE&G) [Member] Transition Funding PSE&G [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding II (PSE&G) [Member] Transition Funding PSE&G [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.34% Due On 2010-2012 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.34% Due On 2010-2012 [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.49% Due On 2012-2013 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.49% Due On 2012-2013 [Member] PSE&G [Member]	Dec. 31, 2012 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.57% Due On 2013-2015 [Member] PSE&G [Member]	Dec. 31, 2011 Transition Funding II (PSE&G) [Member] Securitization Bonds 4.57% Due On 2013-2015 [Member] PSE&G [Member]	Dec. 31, 2012 Non-Recourse Project Debt [Member] Energy Holdings [Member]	Dec. 31, 2011 Non-Recourse Project Debt [Member] Energy Holdings [Member]
Debt Instrument [Line Items]
Fair Value of Swaps			$ 57	[1]	$ 62	[1]
Net Unamortized Discount			(19)	[2]	(23)	[2]	(13)	(16)	(9)	(7)
Total Long-Term Debt			38		39		2,040	2,685	4,566	4,693	4,070	3,970	43	44																																																																																																																																																																				476	690
Stated interest rate of debt instrument															8.50%	2.50%		5.00%		5.50%		5.32%		2.75%		5.13%		4.15%		8.63%								5.00%		5.50%		5.85%		5.75%		5.75%				6.75%				9.25%				8.00%				5.00%								5.20%				5.45%																5.13%				5.00%				5.38%				6.33%				0.85%				5.00%				2.70%				5.30%				7.04%				3.50%				5.25%				5.70%				5.80%				5.38%				5.50%				3.95%				3.65%																		6.61%		6.75%		6.89%								4.34%		4.49%		4.57%
Debt Instrument Maturity Year																2013		2014		2015		2016		2016		2020		2021		2031				2014	[3]			2012		2020		2027		2031		2037				2016	[4]			2021	[4]			2037	[4]			2037	[4]							2025	[4]			2032	[4]			2033	[3],[4]			2046	[3],[4]							2012	[4]			2013	[4]			2013	[4]			2013	[4]			2014	[4]			2014	[4]			2015	[4]			2018	[4]			2020	[4]			2020	[4]			2035	[4]			2036	[4]			2037	[4]			2039	[4]			2040	[4]			2042	[4]			2042	[4]							2011-2020	[5]			2012	[5]					2011-2013		2013-2014		2014-2015								2011-2012		2012-2013		2013-2015
Long-term Debt, Carrying Amount	7,923						2,353	2,767	4,804	4,277			44	95		300	300	0	250	300	300	303	303	250	250	406	406	250	250	500	500	2,309	2,559	44	[3]	44	[3]	0	66	0	14	0	19	0	25	0	40	44	208	171	[4]	171	[4]	134	[4]	134	[4]	7	[4]	7	[4]	8	[4]	8	[4]	320	[4]	320	[4]	0	[4]	23	[4]	0	[4]	50	[4]	50	[3],[4]	0	[3],[4]	50	[3],[4]	0	[3],[4]	100	[4]	73	[4]	0	[4]	300	[4]	150	[4]	150	[4]	300	[4]	300	[4]	275	[4]	275	[4]	250	[4]	250	[4]	250	[4]	250	[4]	300	[4]	300	[4]	400	[4]	400	[4]	9	[4]	9	[4]	250	[4]	250	[4]	250	[4]	250	[4]	250	[4]	250	[4]	350	[4]	350	[4]	250	[4]	250	[4]	300	[4]	300	[4]	450	[4]	0	[4]	350	[4]	0	[4]	4,384	[4]	3,884	[4]	44	[5]	45	[5]	0	[5],[6]	50	[5],[6]	690	895	100	305	220	220	370	370			32	44	20	33	0	1	9	20	23	23	43	44
Amounts Due Within One Year	(1,026)	(417)					(300)	(66)	(725)	(300)			(1)	(51)																																																																																																																																																												(214)	(205)									(12)	(11)
Nonrecourse debt													$ 50

[1] PSEG entered into various interest rate swaps to hedge the fair value of certain debt at Power. The fair value adjustments from these hedges are reflected as offsets to long-term debt on the Consolidated Balance Sheet. For additional information, see Note 16. Financial Risk Management Activities.

[2] In September 2009, Power completed an exchange offer with eligible holders of Energy Holdings’ 8.50% Senior Notes due 2011 in order to manage long-term debt maturities. Since the debt exchange was between two subsidiaries of the same parent company, PSEG, and treated as a debt modification for accounting purposes, the resulting premium was deferred and is being amortized over the term of the newly issued debt. The deferred amount is reflected as an offset to Long-Term Debt on PSEG’s Consolidated Balance Sheet.

[3] 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.

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

[5] Non-recourse financing transactions consist of loans from banks and other lenders that are typically secured by project assets and cash flows and generally impose no material obligation on the parent-level investor to repay any debt incurred by the project borrower. The consequences of permitting a project-level default include the potential for loss of any invested equity by the parent.

[6] As a result of the Dynegy bankruptcy proceedings, Energy Holdings ceased leveraged lease accounting and recorded the related nonrecourse project debt on its balance sheet at its fair value of $50 million. Upon settlement of the claims against Dynegy in 2012, Energy Holdings was released from this debt.