Property, Plant And Equipment And Jointly-Owned Facilities (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	$ 35,220	$ 32,839
Total Generation	12,442	12,269
Other	907	836
Total	48,569	45,944
Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	35,220	32,839
Total Generation	658	663
Other	422	398
Total	36,300	33,900
PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	11,784	11,606
Other	88	93
Total	11,872	11,699
Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	0	0
Total Generation	0	0
Other	397	345
Total	397	345
Electric Transmission [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	14,075	12,908
Electric Transmission [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	14,075	12,908
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	9,622	9,255
Electric Distribution [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	9,622	9,255
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	9,081	8,430
Gas Distribution [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	9,081	8,430
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	1,783	1,607
Total Generation	248	277
Construction Work In Progress [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	1,783	1,607
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	248	277
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	659	639
Other Plant [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Transmission and Distribution	659	639
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	6,581	6,570
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	6,581	6,570
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	3,296	3,087
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	3,296	3,087
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	748	761
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	748	761
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	1,569	1,574
Other Production-Solar [Member] | Public Service Electric and Gas Company
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	658	663
Other Production-Solar [Member] | PSEG Power LLC
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	911	911
Other Production-Solar [Member] | Other [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Total Generation	$ 0	$ 0