Schedule Of Consolidated Debt (Fair Value of Debt) (Details) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Floating Rate term loans		$ 13,158
Long-term Debt		13,068	$ 11,395
Long-term Debt, Fair Value		14,062	12,003
PSEG [Member]
Debt Instrument [Line Items]
Floating Rate term loans		2,100	1,200
Long-term Debt		2,091	1,195
Long-term Debt, Fair Value	[1],[2]	2,081	1,185
PSE&G
Debt Instrument [Line Items]
Floating Rate term loans		8,658	7,883
Long-term Debt		8,591	7,818
Long-term Debt, Fair Value	[2]	9,322	8,240
Power [Member]
Debt Instrument [Line Items]
Floating Rate term loans		2,400	2,400
Long-term Debt		2,386	2,382
Long-term Debt, Fair Value	[2]	2,659	2,578
Loans Payable [Member] | PSEG [Member]
Debt Instrument [Line Items]
Floating Rate term loans		$ 700	$ 500

[1] As of December 31, 2017 and 2016, fair value includes floating rate term loans of $700 million and $500 million, respectively. The fair values of the term loan debt (Level 2 measurement) approximate the carrying values because the interest payments are based on LIBOR rates that are reset monthly and the debt is redeemable at face value by PSEG at any time.

[2] Given that these bonds do not trade actively, the fair value amounts of taxable debt securities (primarily Level 2 measurements) are generally determined by a valuation model that is based on a conventional discounted cash flow methodology and utilizes assumptions of current market pricing curves. In order to incorporate the credit risk into the discount rates, pricing is obtained (i.e. U.S. Treasury rate plus credit spread) based on expected new issue pricing across each of the companies’ respective debt maturity spectrum. The credit spreads of various tenors obtained from this information are added to the appropriate benchmark U.S. Treasury rates in order to determine the current market yields for the various tenors. The yields are then converted into discount rates of various tenors that are used for discounting the respective cash flows of the same tenor for each bond or note.