Debt and Credit Facilities Debt - Short-Term Liquidity - Additional Information (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024
Debt Instrument [Line Items]
Commitments of Single Institution as Percentage of Total Commitments		9.00%
Line of Credit Facility, Remaining Borrowing Capacity	[1]	$ 3,454
Line of Credit Facility, Maximum Borrowing Capacity	[1]	3,825
Line of Credit Facility, Fair Value of Amount Outstanding	[1],[2]	371
Repayments of Short-term Debt		0	$ 500
Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		775
Line of Credit Facility, Maximum Borrowing Capacity		1,000
Line of Credit Facility, Fair Value of Amount Outstanding	[2]	225
PSEG Power [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		1,243
Line of Credit Facility, Maximum Borrowing Capacity		1,325
Line of Credit Facility, Fair Value of Amount Outstanding	[2]	82
Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		275
Line of Credit Facility, Fair Value of Amount Outstanding		95
Subsidiary Uncommitted Letter of Credit Facility [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		150
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		3,750
Revolving Credit Facility [Member] | Public Service Electric and Gas Company [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		775
Line of Credit Facility, Maximum Borrowing Capacity		1,000
Line of Credit Facility, Fair Value of Amount Outstanding	[2]	225
Revolving Credit Facility [Member] | PSEG Power [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	[3]	1,213
Line of Credit Facility, Maximum Borrowing Capacity	[3]	1,250
Line of Credit Facility, Fair Value of Amount Outstanding	[3]	$ 37

[1] Amounts do not include uncommitted credit facilities or 364-day term loans, if any apply.

[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 June 30, 2025, PSEG had $50 million outstanding commercial paper at a weighted average interest rate of 4.60% and PSE&G had $200 million outstanding commercial paper at a weighted average interest rate of 4.59%.

[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.