Schedule Of Consolidated Debt (Long-Term Debt) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2009
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 9,639
Long-term Debt, Current Maturities		(734)	$ (624)
PSEG [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		500
Fair Value Of Swaps	[1]	6	22
Long-term Debt, Current Maturities		(6)	(8)
Net Unamortized Discount and Debt Issuance Costs	[2]	0	8
Current Portion of Unamortized Discount on Debt Exchange	[2]	3
Total Long-Term Debt		500	6
PSEG [Member] | Variable Rate Term Loan due 2017 [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		500	0
PSE&G [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		(171)	(300)
Total Long-Term Debt		6,650	5,975
PSE&G [Member] | First And Refunding Mortgage Bonds Six Point Seven Five Percentage Due On Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 171	171
Stated interest rate of debt instrument		6.75%
Maturity Year	[3]	2016
PSE&G [Member] | First And Refunding Mortgage Bonds Nine Point Two Five Percentage Due On Two Twenty One [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 134	134
Stated interest rate of debt instrument		9.25%
Maturity Year	[3]	2021
PSE&G [Member] | First And Refunding Mortgage Bonds Eight Point Zero Zero Percentage Due On Two Thirty Seven [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 7	7
Stated interest rate of debt instrument		8.00%
Maturity Year	[3]	2037
PSE&G [Member] | First And Refunding Mortgage Bonds Five Point Zero Zero Percentage Due On Two Thirty Seven [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 8	8
Stated interest rate of debt instrument		5.00%
Maturity Year	[3]	2037
PSE&G [Member] | First And Refunding Mortgage Bonds [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 320	320
PSE&G [Member] | Pollution Control Bonds Due On 2033 [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3],[4]	$ 50	50
Maturity Year	[3],[4]	2033
PSE&G [Member] | Pollution Control Bonds Due On 2046 [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3],[4]	$ 50	50
Maturity Year	[3],[4]	2046
PSE&G [Member] | Pollution Control Bonds [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 100	100
PSE&G [Member] | Medium Term Notes Two Point Seven Zero Percentage Due On Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 0	300
Stated interest rate of debt instrument		2.70%
Maturity Year	[3]	2015
PSE&G [Member] | Medium Term Notes Five Point Three Zero Percentage Due On Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 400	400
Stated interest rate of debt instrument		5.30%
Maturity Year	[3]	2018
PSE&G [Member] | Medium Term Notes Two Point Three Zero Percent Due In Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 350	350
Stated interest rate of debt instrument		2.30%
Maturity Year	[3]	2018
PSE&G [Member] | Medium Term Notes One Point Eight Percent Due In Two Thousand Nineteen [Member] [Domain]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		1.80%
Maturity Year	[3]	2019
PSE&G [Member] | Medium Term Notes Two Point Zero Percent Due In Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		2.00%
Maturity Year	[3]	2019
PSE&G [Member] | Medium Term Notes Seven Point Zero Four Percentage Due On Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 9	9
Stated interest rate of debt instrument		7.04%
Maturity Year	[3]	2020
PSE&G [Member] | Medium Term Notes Three Point Five Zero Percentage Due On Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		3.50%
Maturity Year	[3]	2020
PSE&G [Member] | Medium Term Notes Two Point Three Eight Percent Due In Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 500	500
Stated interest rate of debt instrument		2.375%
Maturity Year	[3]	2023
PSE&G [Member] | Medium Term Notes Three Point Seven Five Percent Due In Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		3.75%
Maturity Year	[3]	2024
PSE&G [Member] | Medium Term Notes Three Point One Five Percent Due In Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		3.15%
Maturity Year	[3]	2024
PSE&G [Member] | Medium Term Notes Three Point Zero Five Percent Due In Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		3.05%
Maturity Year	[3]	2024
PSE&G [Member] | Medium Term Notes Three Point Zero Percent Due In Two Thousand Twenty Five [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 350	0
Stated interest rate of debt instrument		3.00%
Maturity Year	[3]	2025
PSE&G [Member] | Medium Term Notes Five Point Two Five Percentage Due On Two Thousand Thirty Five [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		5.25%
Maturity Year	[3]	2035
PSE&G [Member] | Medium Term Notes Five Point Seven Zero Percentage Due On Two Thousand Thirty Six [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		5.70%
Maturity Year	[3]	2036
PSE&G [Member] | Medium Term Notes Five Point Eight Zero Percentage Due On Two Thousand Thirty Seven [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 350	350
Stated interest rate of debt instrument		5.80%
Maturity Year	[3]	2037
PSE&G [Member] | Medium Term Notes Five Point Three Eight Percentage Due On Two Thousand Thirty Nine [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		5.38%
Maturity Year	[3]	2039
PSE&G [Member] | Medium Term Notes Five Point Five Zero Percentage Due On Two Thousand Forty [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 300	300
Stated interest rate of debt instrument		5.50%
Maturity Year	[3]	2040
PSE&G [Member] | Medium-Term Notes 3.95% Due On 2042 [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 450	450
Stated interest rate of debt instrument		3.95%
Maturity Year	[3]	2042
PSE&G [Member] | Medium-Term Notes 3.65% Due On 2042 [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 350	350
Stated interest rate of debt instrument		3.65%
Maturity Year	[3]	2042
PSE&G [Member] | Medium Term Notes Three Point Eight Zero Percent Due In Two Thousand Forty Three [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 400	400
Stated interest rate of debt instrument		3.80%
Maturity Year	[3]	2043
PSE&G [Member] | Medium Term Notes Four Point Zero Percent Due In Two Thousand Forty Four [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	250
Stated interest rate of debt instrument		4.00%
Maturity Year	[3]	2044
PSE&G [Member] | Medium Term Notes Four Point Zero Five Percent due Two Thousand Forty Five [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250
Stated interest rate of debt instrument		4.05%
Maturity Year	[3]	2045
PSE&G [Member] | Medium Term Notes Four Point One Five Percent Due In Two Thousand Forty Five [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[3]	$ 250	0
Stated interest rate of debt instrument		4.15%
Maturity Year	[3]	2045
PSE&G [Member] | Total Medium Term Notes [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 6,459	5,909
PSE&G [Member] | Securitization Bonds Six Point Eight Nine Percentage Due On Two Thousand Fourteen To Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 0	251
Stated interest rate of debt instrument		6.89%
Maturity Year		2014-2015
PSE&G [Member] | Transition Funding [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 0	251
Long-term Debt, Current Maturities		0	(251)
Total Long-Term Debt		0	0
PSE&G [Member] | Securitization Bonds Four Point Five Seven Percentage Due On Two Thousand Thirteen To Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 0	8
Stated interest rate of debt instrument		4.57%
Maturity Year		2014-2015
PSE&G [Member] | Transition Funding II [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 0	8
Long-term Debt, Current Maturities		0	(8)
Total Long-Term Debt		0	0
Power [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		2,253	2,553
Long-term Debt, Current Maturities		(553)	(300)
Net Unamortized Discount and Debt Issuance Costs		16	19
Total Long-Term Debt		1,684	2,234
Power [Member] | Senior Notes Five Point Five Zero Percentage Due Two Thousand Fifteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 0	300
Stated interest rate of debt instrument		5.50%
Maturity Year		2015
Power [Member] | Senior Notes Five Point Three Two Percentage Due Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 303	303
Stated interest rate of debt instrument		5.32%
Maturity Year		2016
Power [Member] | Senior Notes Two Point Seven Five Percentage Due Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 250	250
Stated interest rate of debt instrument		2.75%
Maturity Year		2016
Power [Member] | Senior Notes Two Point Four Five Percentage Due Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 250	250
Stated interest rate of debt instrument		2.45%
Maturity Year		2018
Power [Member] | Senior Notes Five Point One Three Percentage Due Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 406	406
Stated interest rate of debt instrument		5.13%
Maturity Year		2020
Power [Member] | Senior Notes Four Point One Five Percentage Due Two Thousand Twenty One [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 250	250
Stated interest rate of debt instrument		4.15%
Maturity Year		2021
Power [Member] | Senior Notes Four Point Three Percent Due Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 250	250
Stated interest rate of debt instrument		4.30%
Maturity Year		2023
Power [Member] | Senior Notes Eight Point Six Three Percent Due Two Thousand Thirty One [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 500	500
Stated interest rate of debt instrument		8.63%
Maturity Year		2031
Power [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 2,209	2,509
Power [Member] | Pollution Control Notes Floating Rate Due On Two Thousand Fourteen [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding	[4]	$ 44	44
Maturity Year	[4]	2019
Power [Member] | Pollution Control Notes [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 44	44
PSE&G Excluding Transition Funding and Transition Funding II [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		6,879	6,329
Long-term Debt, Current Maturities		(171)	(300)
Net Unamortized Discount and Debt Issuance Costs		58	54
Total Long-Term Debt		6,650	$ 5,975
Energy Holdings [Member]
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 7
Senior Notes 8.50% Due On 2011 [Member] | Energy Holdings [Member]
Debt Instrument [Line Items]
Stated interest rate of debt instrument				8.50%

[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 Sheets. For additional information, see Note 15. 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 remaining deferred amount of $3 million as of December 31, 2015 is reflected as an offset to Long-Term Debt due within one year on PSEG’s Consolidated Balance Sheets.

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

[4] The Pollution Control Financing Authority of Salem County bonds and the Pennsylvania Economic Development Authority (PEDFA) bond that are serviced and secured by PSE&G Pollution Control Bonds and Power Pollution Control Notes, respectively, are variable rate bonds that are in weekly reset mode. In October 2014, Power executed an extension of the letter of credit backing the PEDFA bond which expires on November 30, 2019.