Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		1 Months Ended			3 Months Ended
		Apr. 30, 2024	Aug. 31, 2023	Apr. 30, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Commercial Paper					$ 525		$ 949
Commitments of Single Institution as Percentage of Total Commitments					10.00%
Line of Credit Facility, Remaining Borrowing Capacity	[1]				$ 3,811
Line of Credit Facility, Maximum Borrowing Capacity	[1]				4,025
Line of Credit Facility, Fair Value of Amount Outstanding	[1],[2]				214
Repayments of Short-term Debt					0	$ 750
Collateral Already Posted, Aggregate Fair Value					281		113
Net Change in Commercial Paper and Loans					(425)	(200)
Public Service Electric and Gas Company [Member]
Commercial Paper					25		$ 425
Line of Credit Facility, Remaining Borrowing Capacity					955
Line of Credit Facility, Maximum Borrowing Capacity					1,000
Line of Credit Facility, Fair Value of Amount Outstanding					45
Net Change in Commercial Paper and Loans					(400)	$ 0
PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					1,358
Line of Credit Facility, Maximum Borrowing Capacity					1,525
Line of Credit Facility, Fair Value of Amount Outstanding					167
Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Maximum Borrowing Capacity					3,750
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 955
Debt Instrument, Maturity Date, Description					Mar 2028
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,000
Line of Credit Facility, Fair Value of Amount Outstanding	[2]				45
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 2028
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 2025 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 30
Debt Instrument, Maturity Date, Description					Apr 2026
Line of Credit Facility, Maximum Borrowing Capacity					$ 75
Line of Credit Facility, Fair Value of Amount Outstanding					45
Letter of Credit Facilities expiring September 2024 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 117
Debt Instrument, Maturity Date, Description					Sept 2024
Line of Credit Facility, Maximum Borrowing Capacity					$ 200
Line of Credit Facility, Fair Value of Amount Outstanding					83
Uncommitted Letter of Credit Facility | PSEG Power [Member]
Line of Credit Facility, Maximum Borrowing Capacity					100
Subsidiary Uncommitted Letter of Credit Facility | PSEG Power [Member]
Line of Credit Facility, Maximum Borrowing Capacity					150
April 2023 Term Loan
Proceeds from Short-Term Loan				$ 750
Repayments of Short-term Debt			$ 250
April 2023 Term Loan | Subsequent Event [Member]
Repayments of Short-term Debt		$ 500
PSEG [Member]
Line of Credit Facility, Remaining Borrowing Capacity					1,498
Line of Credit Facility, Maximum Borrowing Capacity					1,500
Line of Credit Facility, Fair Value of Amount Outstanding					2
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Remaining Borrowing Capacity					$ 1,498
Debt Instrument, Maturity Date, Description					Mar 2028
Line of Credit Facility, Maximum Borrowing Capacity	[3]				$ 1,500
Line of Credit Facility, Fair Value of Amount Outstanding	[2]				2
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper					0
Public Service Electric and Gas Company [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper					$ 25
Short-term Debt, Weighted Average Interest Rate, at Point in Time					5.45%

[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 March 31, 2024, PSEG had no outstanding commercial paper and PSE&G had $25 million outstanding at a weighted average interest rate of 5.45%.

[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.