Property, Plant And Equipment And Jointly-Owned Facilities (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	$ 32,839	$ 30,628
Total Generation	12,269	12,744
Other	836	829
Total	45,944	44,201
Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	32,839	30,628
Total Generation	663	623
Other	398	382
Total	33,900	31,633
PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	11,606	12,121
Other	93	103
Total	11,699	12,224
Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	0	0
Other	345	344
Total	345	344
Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	12,908	11,991
Electric Transmission [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	12,908	11,991
Electric Transmission [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Transmission [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Distribution [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	9,255	8,989
Electric Distribution [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	9,255	8,989
Electric Distribution [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Electric Distribution [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Gas Distribution [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	8,430	7,854
Gas Distribution [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	8,430	7,854
Gas Distribution [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Gas Distribution [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Construction Work In Progress [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	1,607	1,170
Total Generation	277	1,011
Construction Work In Progress [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	1,607	1,170
Total Generation	0	0
Construction Work In Progress [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	277	1,011
Construction Work In Progress [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	0	0
Other Plant [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	639	624
Other Plant [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	639	624
Other Plant [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Other Plant [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Fossil Production [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	6,570	6,541
Fossil Production [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Fossil Production [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	6,570	6,541
Fossil Production [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Production [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	3,087	2,971
Nuclear Production [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Production [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	3,087	2,971
Nuclear Production [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Fuel In Service [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	761	765
Nuclear Fuel In Service [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Nuclear Fuel In Service [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	761	765
Nuclear Fuel In Service [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	0
Other Production-Solar [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	1,574	1,456
Other Production-Solar [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	663	623
Other Production-Solar [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	911	833
Other Production-Solar [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	0	$ 0
Other Production-Solar [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Net Book value of two California solar facilities	$ 55