Financial Risk Management Activities (Schedule Of Derivative Instruments Fair Value In Balance Sheets) (Detail) - USD ($) $ in Millions		Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Net Cash Collateral/Margin Postings to Counterparties		$ 1,521	$ 343	$ 844
Derivative Contracts, Current Assets		18		72
Derivative Contracts, Noncurrent Assets		15		28
Total Mark-to-Market Derivative Assets		33		100
Derivative Contracts, Current Liabilities		(124)		(17)
Derivative Contracts, Noncurrent Liabilities		(33)		(17)
Total Mark-to-Market Derivative (Liabilities)		(157)		(34)
Net Mark-to-Market Derivative Assets (Liabilities)		(124)		66
PSEG Power LLC [Member]
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		14
Derivative Contracts, Noncurrent Assets		15
Total Mark-to-Market Derivative Assets		29
Derivative Contracts, Current Liabilities		(124)
Derivative Contracts, Noncurrent Liabilities		(30)
Total Mark-to-Market Derivative (Liabilities)		(154)
Net Mark-to-Market Derivative Assets (Liabilities)		(125)
Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net				(30)
Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		616
Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net		495		335
Interest Rate Swaps [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		4
Derivative Contracts, Noncurrent Assets		0
Total Mark-to-Market Derivative Assets		4
Derivative Contracts, Current Liabilities		0
Derivative Contracts, Noncurrent Liabilities		(3)
Total Mark-to-Market Derivative (Liabilities)		(3)
Net Mark-to-Market Derivative Assets (Liabilities)		1
Energy-Related Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	1,111		615
Energy-Related Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Contracts, Current Assets		1,721		816
Derivative Contracts, Noncurrent Assets		629		546
Total Mark-to-Market Derivative Assets		2,350		1,362
Derivative Contracts, Current Liabilities		(2,447)		(1,055)
Derivative Contracts, Noncurrent Liabilities		(1,139)		(856)
Total Mark-to-Market Derivative (Liabilities)		(3,586)		(1,911)
Net Mark-to-Market Derivative Assets (Liabilities)		(1,236)		(549)
Energy-Related Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(1,707)		(744)
Energy-Related Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	2,323		1,038
Energy-Related Contracts [Member] | Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	1,109		839
Energy-Related Contracts [Member] | Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1]	(614)		(518)
Energy-Related Contracts [Member] | Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1],[2]	(2,321)		(1,262)
Energy-Related Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Amount Offset Against Collateral, Net	[1],[2]	$ 3,432		$ 1,877

[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, 2022 and 2021, PSEG Power had net cash collateral payments to counterparties of $1,521 million and $844 million, respectively. Of these net cash collateral (receipts) payments, $1,111 million as of December 31, 2022 and $615 million as of December 31, 2021 were netted against the corresponding net derivative contract positions. 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. Of the $615 million as of December 31, 2021, $(30) million was netted against current assets, $(13) million was netted against non-current assets, $323 million was netted against current liabilities and $335 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 18. Financial Risk Management Activities for additional detail.