Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		1 Months Ended	3 Months Ended
		Apr. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021
Commercial Paper			$ 1,676				$ 3,519
Commitments of Single Institution as Percentage of Total Commitments			8.00%
Line of Credit Facility, Remaining Borrowing Capacity			$ 3,242
Line of Credit Facility, Maximum Borrowing Capacity			3,850
Line of Credit Facility, Fair Value of Amount Outstanding	[1]		608
Proceeds from Short-Term Loan			0			$ 500
Repayments of Short-term Debt			1,250			300
Collateral Already Posted, Aggregate Fair Value			1,527				844
Net Change in Commercial Paper and Loans			(593)			(598)
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			1,188
Line of Credit Facility, Maximum Borrowing Capacity			1,350
Line of Credit Facility, Fair Value of Amount Outstanding			162
Collateral Already Posted, Aggregate Fair Value			1,500				343
PSEG Power [Member] | Subsequent Event [Member]
Collateral Already Posted, Aggregate Fair Value		$ 2,600
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			$ 1,171
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			79
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			$ 17
Debt Instrument, Maturity Date, Description			Sept 2023
Line of Credit Facility, Maximum Borrowing Capacity			$ 100
Line of Credit Facility, Fair Value of Amount Outstanding			83
Letter of Credit Facilities expiring April 2024 | PSEG Power [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity		100
Letter of Credit Facilities expiring April 2025 | PSEG Power [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity		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
Proceeds from Short-Term Loan				$ 1,250
April 2022 Term Loan | Subsequent Event [Member]
Proceeds from Short-Term Loan		$ 1,500
PSEG [Member]
Line of Credit Facility, Remaining Borrowing Capacity			1,072
Line of Credit Facility, Maximum Borrowing Capacity			1,500
Line of Credit Facility, Fair Value of Amount Outstanding			428
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Line of Credit Facility, Remaining Borrowing Capacity			$ 1,072
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]		428
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member]
Commercial Paper			$ 426
Short-term Debt, Weighted Average Interest Rate, at Point in Time			0.44%

[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 March 31, 2022, PSEG had $426 million outstanding at a weighted average interest rate of 0.44%. PSE&G had no Commercial Paper outstanding as of March 31, 2022.

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