Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		1 Months Ended				12 Months Ended
		Aug. 31, 2023	May 31, 2023	Apr. 30, 2023	Jan. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[1]					$ 4,025
Line of Credit Facility, Amount Outstanding	[1],[2]					660
Available Liquidity	[1]					3,365
Commercial Paper and Loans						949	$ 2,200
Proceeds from Short-term Debt						750	2,000	$ 2,500
Repayments of Short-term Debt						2,250	2,500	300
Issuance of Long-Term Debt						2,800	2,850	2,825
Collateral Already Posted, Aggregate Fair Value						$ 113	1,521
Maximum [Member]
Short-term Debt [Line Items]
Commitments of single institution as percentage of total commitments						10.00%
PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 1,500
Line of Credit Facility, Amount Outstanding	[2]					27
Available Liquidity						1,473
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]					445
Available Liquidity						555
Commercial Paper and Loans						425	0
Issuance of Long-Term Debt						1,800	$ 900	$ 1,325
PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						1,525
Line of Credit Facility, Amount Outstanding	[2]					188
Available Liquidity						1,337
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Commercial Paper and Loans						$ 25
Short-term Debt, Weighted Average Interest Rate, at Point in Time						5.60%
Revolving Credit Facility [Member] | Public Service Electric and Gas Company
Short-term Debt [Line Items]
Commercial Paper and Loans						$ 425
Short-term Debt, Weighted Average Interest Rate, at Point in Time						5.57%
April 2022 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt						$ 1,500
Repayments of Short-term Debt				$ 750	$ 750
April 2023 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt				$ 750
Repayments of Short-term Debt		$ 250
May 2023 Term Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt			$ 500
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[3]					1,500
Line of Credit Facility, Amount Outstanding	[2],[3]					27
Available Liquidity	[3]					$ 1,473
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]					445
Available Liquidity	[3]					$ 555
Expiration Date						Mar 2027
Revolving Credit Facility [Member] | 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]					39
Available Liquidity	[3]					$ 1,211
Expiration Date						Mar 2027
Letter of Credit Facilities expiring September 2024 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 200
Line of Credit Facility, Amount Outstanding	[2]					83
Available Liquidity						$ 117
Expiration Date						Sept 2024
Uncommitted Letter of Credit Facility | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 100
Subsidiary Uncommitted Letter of Credit Facility | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						150
Letter of Credit Facilities expiring April 2026 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						75
Line of Credit Facility, Amount Outstanding	[2]					66
Available Liquidity						$ 9
Expiration Date						Apr 2026

[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, 2023, PSEG had $25 million outstanding at a weighted average interest rate of 5.60%. PSE&G had $425 million Commercial Paper outstanding at a weighted average interest rate of 5.57%.

[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.