Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2022
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]	$ 4,150
Line of Credit Facility, Amount Outstanding	[1],[2]	461
Available Liquidity	[1]	3,689
Commercial Paper and Loans		$ 2,200	$ 3,519
Commitments of single institution as percentage of total commitments		10.00%
Proceeds from Short-term Debt		$ 2,000	2,500	$ 800
Repayments of Short-term Debt		2,500	300	500
Issuance of Long-Term Debt		2,850	2,825	2,450
Collateral Already Posted, Aggregate Fair Value		1,521	844		$ 343
PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,500
Line of Credit Facility, Amount Outstanding	[2]	202
Available Liquidity		1,298
Public Service Electric and Gas Company
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,000
Line of Credit Facility, Amount Outstanding	[2]	18
Available Liquidity		982
Issuance of Long-Term Debt		900	1,325	$ 1,350
PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,650
Line of Credit Facility, Amount Outstanding	[2]	241
Available Liquidity		1,409
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Commercial Paper and Loans		$ 200
Short-term Debt, Weighted Average Interest Rate, at Point in Time		4.40%
Power credit facility
Short-term Debt [Line Items]
Proceeds from Short-term Debt		$ 700
Repayments of Short-term Debt		1,250
March 2021 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt			500
Repayments of Short-term Debt		500
May 2021 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt			750
Repayments of Short-term Debt		750
August 2021 Term Loan
Short-term Debt [Line Items]
Repayments of Short-term Debt		1,250
April 2022 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt		1,500
Repayments of Short-term Debt		750
May 2022 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt		500
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Credit Facility Reduction		1,500
Line of Credit Facility, Maximum Borrowing Capacity	[3]	1,500
Line of Credit Facility, Amount Outstanding	[2],[3]	202
Available Liquidity	[3]	$ 1,298
Expiration Date		Mar 2027
Revolving Credit Facility [Member] | Public Service Electric and Gas Company
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[3]	$ 1,000
Line of Credit Facility, Amount Outstanding	[2],[3]	18
Available Liquidity	[3]	$ 982
Expiration Date		Mar 2027
Revolving Credit Facility [Member] | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,250
Expiration Date		Mar 2027
Revolving Credit Facility [Member] | Parent and PSEG Power
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,750	$ 3,400
Letter of Credit Facilities expiring September 2022 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[3]	1,250
Line of Credit Facility, Amount Outstanding	[2],[3]	63
Available Liquidity	[3]	1,187
Letter of Credit Facilities expiring September 2024 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		200
Letter of Credit Facilities expiring September 2023 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Amount Outstanding	[2]	120
Available Liquidity		$ 80
Expiration Date		Sept 2024
Letter of Credit Facilities expiring April 2024 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Amount Outstanding	[2]	32
Available Liquidity		$ 68
Expiration Date		Apr 2024
Letter of Credit Facilities expiring April 2025 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 100
Line of Credit Facility, Amount Outstanding	[2]	26
Available Liquidity		$ 74
Expiration Date		Apr 2025
Uncommitted Letter of Credit Facility | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 200

[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 December 31, 2022, PSEG had $200 million outstanding at a weighted average interest rate of 4.4%. PSE&G had no Commercial Paper outstanding as of December 31, 2022.

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