Financial Risk Management Activities (Schedule Of Derivative Instruments Fair Value In Balance Sheets) (Detail) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Net Cash Collateral/Margin Postings to Counterparties		$ 113	$ 1,521
Derivative Contracts, Current Assets		112	18
Derivative Contracts, Noncurrent Assets		29	15
Total Mark-to-Market Derivative Assets		141	33
Derivative Contracts, Current Liabilities		(86)	(124)
Derivative Contracts, Noncurrent Liabilities		(6)	(33)
Total Mark-to-Market Derivative (Liabilities)		(92)	(157)
Net Mark-to-Market Derivative Assets (Liabilities)		49	(124)
PSEG Power LLC [Member]
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		106	14
Derivative Contracts, Noncurrent Assets		29	15
Total Mark-to-Market Derivative Assets		135	29
Derivative Contracts, Current Liabilities		(70)	(124)
Derivative Contracts, Noncurrent Liabilities		(5)	(30)
Total Mark-to-Market Derivative (Liabilities)		(75)	(154)
Net Mark-to-Market Derivative Assets (Liabilities)		60	(125)
Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		(1)
Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		15	616
Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		8	495
Interest Rate Swaps [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Net Mark-to-Market Derivative Assets (Liabilities)		5	1
Energy-Related Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	22	1,111
Energy-Related Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		912	1,721
Derivative Contracts, Noncurrent Assets		440	629
Total Mark-to-Market Derivative Assets		1,352	2,350
Derivative Contracts, Current Liabilities		(890)	(2,447)
Derivative Contracts, Noncurrent Liabilities		(424)	(1,139)
Total Mark-to-Market Derivative (Liabilities)		(1,314)	(3,586)
Net Mark-to-Market Derivative Assets (Liabilities)		38	(1,236)
Energy-Related Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(806)	(1,707)
Energy-Related Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	820	2,323
Energy-Related Contracts [Member] | Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	419	1,109
Energy-Related Contracts [Member] | Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(411)	(614)
Energy-Related Contracts [Member] | Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1],[2]	(1,217)	(2,321)
Energy-Related Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1],[2]	1,239	3,432
Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		6	4
Derivative Contracts, Noncurrent Assets		0	0
Total Mark-to-Market Derivative Assets		6	4
Derivative Contracts, Current Liabilities		(16)	0
Derivative Contracts, Noncurrent Liabilities		(1)	(3)
Total Mark-to-Market Derivative (Liabilities)		(17)	(3)
Net Mark-to-Market Derivative Assets (Liabilities)		(11)	1
Interest Rate Contract | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		$ 0	$ 0	[2]

[1] Represents the netting of fair value balances with the same counterparty (where the right of offset exists) and the application of cash collateral. All cash collateral (received) posted that has been allocated to derivative positions, where the right of offset exists, has been offset on the Consolidated Balance Sheets. As of December 31, 2023 and 2022, PSEG Power had net cash collateral payments to counterparties of $113 million and $1,521 million, respectively. Of these net cash collateral (receipts) payments, $22 million as of December 31, 2023 and $1,111 million as of December 31, 2022 were netted against the corresponding net derivative contract positions. Of the $22 million as of December 31, 2023, $(1) million was netted against current assets, $15 million was netted against current liabilities and $8 million was netted against noncurrent liabilities. Of the $1,111 million as of December 31, 2022, $616 million was netted against current liabilities and $495 million was netted against noncurrent liabilities.

[2] Represents the netting of fair value balances with the same counterparty (where the right of offset exists) and the application of collateral. See Note 16. Financial Risk Management Activities for additional detail.