Debt and Credit Facilities (Long-Term Debt Maturities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Repayments in Next Twelve Months	$ 1,500
Repayments in Year Two	2,150
Repayments in Year Three	875
Repayments in Year Four	1,125
Repayments in Year Five	1,300
Thereafter	12,461
Long-term Debt	19,411
Public Service Electric and Gas Company
Debt Instrument [Line Items]
Long-term Debt	13,765	$ 12,790
PSEG Power LLC [Member]
Debt Instrument [Line Items]
Long-term Debt	1,250	1,250
PSEG [Member]
Debt Instrument [Line Items]
Repayments in Next Twelve Months	750
Repayments in Year Two	550
Repayments in Year Three	0
Repayments in Year Four	700
Repayments in Year Five	600
Thereafter	1,796
Long-term Debt	4,396	$ 4,146
Public Service Electric and Gas Company
Debt Instrument [Line Items]
Repayments in Next Twelve Months	750
Repayments in Year Two	350
Repayments in Year Three	875
Repayments in Year Four	425
Repayments in Year Five	700
Thereafter	10,665
Long-term Debt	13,765
PSEG Power LLC [Member]
Debt Instrument [Line Items]
Repayments in Next Twelve Months	0
Repayments in Year Two	1,250
Repayments in Year Three	0
Repayments in Year Four	0
Repayments in Year Five	0
Thereafter	0
Long-term Debt	$ 1,250