Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		1 Months Ended	6 Months Ended
		Jul. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Commercial Paper			$ 3,313		$ 3,519
Commitments of Single Institution as Percentage of Total Commitments			9.00%
Line of Credit Facility, Remaining Borrowing Capacity			$ 3,387
Line of Credit Facility, Maximum Borrowing Capacity			4,050
Line of Credit Facility, Fair Value of Amount Outstanding	[1]		663
Proceeds from Short-Term Loan			2,000	$ 1,250
Repayments of Short-term Debt			1,250	300
Collateral Already Posted, Aggregate Fair Value			2,088		844
Net Change in Commercial Paper and Loans			(956)	(563)
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			970
Line of Credit Facility, Maximum Borrowing Capacity			1,550
Line of Credit Facility, Fair Value of Amount Outstanding			580
Collateral Already Posted, Aggregate Fair Value			2,100	$ 343
PSEG Power [Member] | Subsequent Event [Member]
Collateral Already Posted, Aggregate Fair Value		$ 2,500
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	[1]		18
Five Year Credit Facility Maturing March 2023 [Member] | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity			$ 944
Debt Instrument, Maturity Date, Description			Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity	[2]		$ 1,250
Line of Credit Facility, Fair Value of Amount Outstanding			306
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			$ 1
Debt Instrument, Maturity Date, Description			Sept 2023
Line of Credit Facility, Maximum Borrowing Capacity			$ 100
Line of Credit Facility, Fair Value of Amount Outstanding			99
Letter of Credit Facilities expiring April 2024 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity			$ 25
Debt Instrument, Maturity Date, Description			Apr 2024
Line of Credit Facility, Maximum Borrowing Capacity			$ 100
Line of Credit Facility, Fair Value of Amount Outstanding			75
Letter of Credit Facilities expiring April 2025 | PSEG Power [Member]
Line of Credit Facility, Remaining Borrowing Capacity			$ 0
Debt Instrument, Maturity Date, Description			Apr 2025
Line of Credit Facility, Maximum Borrowing Capacity			$ 100
Line of Credit Facility, Fair Value of Amount Outstanding			100
March 2021 Term Loan
Repayments of Short-term Debt			500
May 2021 Term Loan
Repayments of Short-term Debt			750
August 2021 Term Loan | Subsequent Event [Member]
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			1,435
Line of Credit Facility, Maximum Borrowing Capacity			1,500
Line of Credit Facility, Fair Value of Amount Outstanding			65
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Remaining Borrowing Capacity			$ 1,435
Debt Instrument, Maturity Date, Description			Mar 2027
Line of Credit Facility, Maximum Borrowing Capacity	[2]		$ 1,500
Line of Credit Facility, Fair Value of Amount Outstanding	[1]		65
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper			$ 63
Short-term Debt, Weighted Average Interest Rate, at Point in Time			1.25%

[1] The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs, under which as of June 30, 2022, PSEG had $63 million outstanding at a weighted average interest rate of 1.25%. PSE&G had no Commercial Paper outstanding as of June 30, 2022.

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