Schedule Of Consolidated Debt (Short-Term Liquidity) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 4,200
Line of Credit Facility, Amount Outstanding		722
Available Liquidity		3,478
Commercial Paper and Loans		$ 542	$ 388
Commitments of single institution as percentage of total commitments		8.00%
PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,500
Line of Credit Facility, Amount Outstanding		556
Available Liquidity		944
PSE&G [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		600
Line of Credit Facility, Amount Outstanding		15
Available Liquidity		585
Power [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		2,100
Line of Credit Facility, Amount Outstanding		151
Available Liquidity		1,949
Five Year Credit Facility Maturing on April 2020 [Member] | PSEG [Member]
Short-term Debt [Line Items]
Commercial Paper and Loans		$ 542
Short-term Debt, Weighted Average Interest Rate, at Point in Time		1.89%
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 1,500
Line of Credit Facility, Amount Outstanding	[1]	556
Available Liquidity	[1]	$ 944
Expiration Date		Mar 2022
Revolving Credit Facility [Member] | PSE&G [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 600
Line of Credit Facility, Amount Outstanding	[1]	15
Available Liquidity	[1]	$ 585
Expiration Date		Mar 2022
Revolving Credit Facility [Member] | Power [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,900
Line of Credit Facility, Amount Outstanding		39
Available Liquidity		$ 1,861
Expiration Date		Mar 2022
Letter of Credit [Member] | Power [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 200
Line of Credit Facility, Amount Outstanding		112
Available Liquidity		$ 88
Expiration Date		Mar 2020

[1] The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs under which as of December 31, 2017, PSEG had $542 million outstanding at a weighted average interest rate of 1.89%. PSE&G had no amounts outstanding under its Commercial Paper Program as of December 31, 2017.