Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Oct. 31, 2022	Dec. 31, 2021	Jun. 30, 2021
Commercial Paper		$ 2,235			$ 3,519
Commitments of Single Institution as Percentage of Total Commitments		10.00%
Line of Credit Facility, Remaining Borrowing Capacity	[1]	$ 3,406
Line of Credit Facility, Maximum Borrowing Capacity	[1]	4,150
Line of Credit Facility, Fair Value of Amount Outstanding	[1],[2]	744
Proceeds from Short-Term Loan		2,000	$ 2,500
Repayments of Short-term Debt		2,500	300
Collateral Already Posted, Aggregate Fair Value		2,161			844
Net Change in Commercial Paper and Loans		(784)	442
Public Service Electric and Gas Company [Member]
Line of Credit Facility, Remaining Borrowing Capacity		982
Line of Credit Facility, Maximum Borrowing Capacity		1,000
Line of Credit Facility, Fair Value of Amount Outstanding		18
Net Change in Commercial Paper and Loans		0	$ (100)
PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity		1,161
Line of Credit Facility, Maximum Borrowing Capacity		1,650
Line of Credit Facility, Fair Value of Amount Outstanding		489
Collateral Already Posted, Aggregate Fair Value		2,200				$ 343
PSEG Power [Member] | Subsequent Event [Member]
Collateral Already Posted, Aggregate Fair Value				$ 1,700
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 982
Debt Instrument, Maturity Date, Description		Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,000			600
Line of Credit Facility, Fair Value of Amount Outstanding	[2]	18
Five Year Credit Facility Maturing March 2023 [Member] | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 1,133
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		117
Five Year Credit Facility Maturing March 2023 [Member] | Parent and PSEG Power
Line of Credit Facility, Maximum Borrowing Capacity		2,750			$ 3,400
Letter of Credit Facilities expiring September 2022 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 4
Debt Instrument, Maturity Date, Description		Sept 2024
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Fair Value of Amount Outstanding		196
Letter of Credit Facilities expiring April 2024 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 15
Debt Instrument, Maturity Date, Description		Apr 2024
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Fair Value of Amount Outstanding		85
Letter of Credit Facilities expiring April 2025 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 9
Debt Instrument, Maturity Date, Description		Apr 2025
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Fair Value of Amount Outstanding		91
Letter of Credit Facilities expiring September 2024 | PSEG Power [Member]
Line of Credit Facility, Maximum Borrowing Capacity		200
Uncommitted Letter of Credit Facility | PSEG Power [Member]
Line of Credit Facility, Maximum Borrowing Capacity		200
March 2021 Term Loan
Repayments of Short-term Debt		500
May 2021 Term Loan
Repayments of Short-term Debt		750
August 2021 Term Loan
Repayments of Short-term Debt		1,250
April 2022 Term Loan
Proceeds from Short-Term Loan		1,500
May 2022 Term Loan
Proceeds from Short-Term Loan		500
PSEG [Member]
Line of Credit Facility, Remaining Borrowing Capacity		1,263
Line of Credit Facility, Maximum Borrowing Capacity		1,500
Line of Credit Facility, Fair Value of Amount Outstanding		237
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Remaining Borrowing Capacity		$ 1,263
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]	237
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper		$ 235
Short-term Debt, Weighted Average Interest Rate, at Point in Time		3.10%

[1] Amounts do not include uncommitted credit facilities.

[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, 2022, PSEG had $235 million outstanding at a weighted average interest rate of 3.10%. PSE&G had no Commercial Paper outstanding as of September 30, 2022.

[3] Master Credit Facility with sub-limits of $1.5 billion for PSEG and $1.25 billion for PSEG Power.