Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		1 Months Ended			9 Months Ended
		May 31, 2023	Apr. 30, 2023	Apr. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Commercial Paper					$ 695		$ 2,200
Commitments of Single Institution as Percentage of Total Commitments					10.00%
Line of Credit Facility, Remaining Borrowing Capacity	[1]				$ 3,749
Line of Credit Facility, Maximum Borrowing Capacity	[1]				4,150
Line of Credit Facility, Fair Value of Amount Outstanding	[1],[2]				401
Proceeds from Short-Term Loan					750	$ 2,000
Repayments of Short-term Debt					2,250	2,500
Collateral Already Posted, Aggregate Fair Value					346		1,521
Net Change in Commercial Paper and Loans					(5)	(784)
Public Service Electric and Gas Company [Member]
Commercial Paper					100		$ 0
Line of Credit Facility, Remaining Borrowing Capacity					880
Line of Credit Facility, Maximum Borrowing Capacity					1,000
Line of Credit Facility, Fair Value of Amount Outstanding					120
Net Change in Commercial Paper and Loans					100	$ 0
PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					1,466
Line of Credit Facility, Maximum Borrowing Capacity					1,650
Line of Credit Facility, Fair Value of Amount Outstanding					184
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 880
Debt Instrument, Maturity Date, Description					Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,000
Line of Credit Facility, Fair Value of Amount Outstanding	[2]				120
Five Year Credit Facility Maturing March 2023 [Member] | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 1,211
Debt Instrument, Maturity Date, Description					Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity	[3]				$ 1,250
Line of Credit Facility, Fair Value of Amount Outstanding					39
Letter of Credit Facilities expiring April 2024 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 34
Debt Instrument, Maturity Date, Description					Apr 2024
Line of Credit Facility, Maximum Borrowing Capacity					$ 100
Line of Credit Facility, Fair Value of Amount Outstanding					66
Letter of Credit Facilities expiring April 2025 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 100
Debt Instrument, Maturity Date, Description					Apr 2025
Line of Credit Facility, Maximum Borrowing Capacity					$ 100
Line of Credit Facility, Fair Value of Amount Outstanding					0
Letter of Credit Facilities expiring September 2024 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 121
Debt Instrument, Maturity Date, Description					Sept 2024
Line of Credit Facility, Maximum Borrowing Capacity					$ 200
Line of Credit Facility, Fair Value of Amount Outstanding					79
Uncommitted Letter of Credit Facility | PSEG Power [Member]
Line of Credit Facility, Maximum Borrowing Capacity					150
April 2022 Term Loan
Proceeds from Short-Term Loan				$ 1,500
Repayments of Short-term Debt			$ 750		750
April 2023 Term Loan
Proceeds from Short-Term Loan			750
Repayments of Short-term Debt			$ 250
May 2023 Term Loan
Proceeds from Short-Term Loan		$ 500
PSEG [Member]
Line of Credit Facility, Remaining Borrowing Capacity					1,403
Line of Credit Facility, Maximum Borrowing Capacity					1,500
Line of Credit Facility, Fair Value of Amount Outstanding					97
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 1,403
Debt Instrument, Maturity Date, Description					Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity	[3]				$ 1,500
Line of Credit Facility, Fair Value of Amount Outstanding	[2]				97
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper					$ 95
Short-term Debt, Weighted Average Interest Rate, at Point in Time					5.46%
Public Service Electric and Gas Company [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper					$ 100
Short-term Debt, Weighted Average Interest Rate, at Point in Time					5.49%

[1] Amounts do not include uncommitted credit facilities or 364-day term loans.

[2] The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs, under which as of September 30, 2023, PSEG had $95 million outstanding at a weighted average interest rate of 5.46% and PSE&G had $100 million outstanding at a weighted average interest rate of 5.49%.

[3] Master Credit Facility with sub-limits of $1.5 billion for PSEG and $1.25 billion for PSEG Power; sub-limits can be adjusted pursuant to the terms of the Master Credit Facility agreement. The PSEG sub-limit includes a sustainability linked pricing based mechanism with potential increases or decreases, which are not expected to be material, depending on performance relative to targeted methane emission reductions.