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Financial Risk Management Activities (Schedule Of Derivative Instruments Fair Value In Balance Sheets) (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Derivatives, Fair Value [Line Items] |  |  |  |
Net Cash Collateral/Margin Postings to Counterparties |  | $ 844 | $ 343 | $ 54
Derivative Contracts, Current Assets |  | 72 |  | 60
Derivative Contracts, Noncurrent Assets |  | 28 |  | 9
Total Mark-to-Market Derivative Assets |  | 100 |  | 69
Derivative Contracts, Current Liabilities |  | (17) |  | (21)
Derivative Contracts, Noncurrent Liabilities |  | (17) |  | (4)
Total Mark-to-Market Derivative (Liabilities) |  | (34) |  | (25)
Net Mark-to-Market Derivative Assets (Liabilities) |  | 66 |  | 44
Current Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net |  | (30) |  | (13)
Current Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net |  | 323 |  |
Noncurrent Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net |  | 335 |  | 21
Noncurrent Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net |  | (13) |  |
Energy-Related Contracts [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | 615 |  | 8
Energy-Related Contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative Contracts, Current Assets |  | 816 |  | 464
Derivative Contracts, Noncurrent Assets |  | 546 |  | 93
Total Mark-to-Market Derivative Assets |  | 1,362 |  | 557
Derivative Contracts, Current Liabilities |  | (1,055) |  | (412)
Derivative Contracts, Noncurrent Liabilities |  | (856) |  | (109)
Total Mark-to-Market Derivative (Liabilities) |  | (1,911) |  | (521)
Net Mark-to-Market Derivative Assets (Liabilities) |  | (549) |  | 36
Energy-Related Contracts [Member] | Current Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | (744) |  | (404)
Energy-Related Contracts [Member] | Current Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | 1,038 |  | 391
Energy-Related Contracts [Member] | Noncurrent Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | 839 |  | 105
Energy-Related Contracts [Member] | Noncurrent Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | (518) |  | (84)
Energy-Related Contracts [Member] | Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1],[2] | (1,262) |  | (488)
Energy-Related Contracts [Member] | Other Liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1],[2] | $ 1,877 |  | $ 496
[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, 2021 and 2020, PSEG Power had net cash collateral payments to counterparties of $844 million and $54 million, respectively. Of these net cash collateral (receipts) payments, $615 million as of December 31, 2021 and $8 million as of December 31, 2020 were netted against the corresponding net derivative contract positions. 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. Of the $8 million as of December 31, 2020, $(13) million was netted against current assets and $21 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.

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