Debt and Credit Facilities (Long-Term Debt Financing Transactions) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Commercial Paper		$ 949	$ 2,200
Issuance of Long-Term Debt		2,800	2,850	$ 2,825
Long-term Debt		19,411
Premium Paid on Early Extinguishment of Debt		0	0	294
Senior Notes Five Point Eight Seven Five Percent due Two Thousand Twenty Eight
Debt Instrument [Line Items]
Issuance of Long-Term Debt		600
Long-term Debt		$ 600	0
Stated interest rate of debt instrument		5.88%
Senior Notes Six Point One Two Five Percent due Two Thousand Thirty Three
Debt Instrument [Line Items]
Issuance of Long-Term Debt		$ 400
Long-term Debt		$ 400	0
Stated interest rate of debt instrument		6.13%
PSEG [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 4,396	4,146
PSEG [Member] | Senior Notes Zero Point Eight Four Percent Due In Two Thousand Twenty Three
Debt Instrument [Line Items]
Long-term Debt		$ 0	750
Stated interest rate of debt instrument		0.84%
Repayments of Long-term Debt		$ 750
Public Service Electric and Gas Company
Debt Instrument [Line Items]
Commercial Paper		425	0
Issuance of Long-Term Debt		1,800	900	$ 1,325
Long-term Debt		13,765	12,790
Public Service Electric and Gas Company | Medium Term Notes Five Point Two Zero Percent due Two Thousand Thirty Three
Debt Instrument [Line Items]
Issuance of Long-Term Debt		500
Long-term Debt	[1]	$ 500	0
Stated interest rate of debt instrument		5.20%
Public Service Electric and Gas Company | Medium Term Notes Green Bond Four Point Six Five Percent due Two Thousand Thirty Three
Debt Instrument [Line Items]
Issuance of Long-Term Debt		$ 500
Long-term Debt	[1]	$ 500	0
Stated interest rate of debt instrument		4.65%
Public Service Electric and Gas Company | Medium Term Notes Green Bond Five Point One Three Percent due Two Thousand Fifty Three
Debt Instrument [Line Items]
Issuance of Long-Term Debt		$ 400
Long-term Debt	[1]	$ 400	0
Stated interest rate of debt instrument		5.13%
Public Service Electric and Gas Company | Medium Term Notes Five Point Four Five Percent due Two Thousand Fifty Three
Debt Instrument [Line Items]
Issuance of Long-Term Debt		$ 400
Long-term Debt	[1]	$ 400	0
Stated interest rate of debt instrument		5.45%
Public Service Electric and Gas Company | Medium Term Notes Two Point Three Eight Percent Due In Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Long-term Debt	[1]	$ 0	500
Stated interest rate of debt instrument		2.38%
Repayments of Long-term Debt		$ 500
Public Service Electric and Gas Company | Medium Term Notes Three Point Two Five Percent due Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	[1]	$ 0	325
Stated interest rate of debt instrument		3.25%
Repayments of Long-term Debt		$ 325
PSEG Power LLC [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 1,250	$ 1,250

[1] Secured by essentially all property of PSE&G pursuant to its First and Refunding Mortgage.