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Asset Retirement Obligations (AROs) (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset Retirement Obligation [Abstract] |
Impact Of The Revisions On Asset Retirement Obligation | The changes to the ARO liabilities for PSEG, PSE&G and PSEG Power during 2019 and 2020 are presented in the following table:
|  |  | PSEG |  | PSE&G |  | PSEG Power |  | Other |
|  |  | Millions |
| ARO Liability as of January 1, 2019 |  | $ | 1,063 |  |  | $ | 302 |  |  | $ | 758 |  |  | $ | 3 |  |
| Liabilities Settled |  | (19) |  |  | (18) |  |  | (1) |  |  | — |  |
| Liabilities Incurred |  | 3 |  |  | 1 |  |  | 2 |  |  | — |  |
| Accretion Expense |  | 40 |  |  | — |  |  | 40 |  |  | — |  |
| Accretion Expense Deferred and Recovered in Rate Base (A) |  | 16 |  |  | 16 |  |  | — |  |  | — |  |
| Revision to Present Values of Estimated Cash Flows |  | (16) |  |  | 2 |  |  | (18) |  |  | — |  |
| ARO Liability as of December 31, 2019 |  | $ | 1,087 |  |  | $ | 303 |  |  | $ | 781 |  |  | $ | 3 |  |
| Liabilities Settled |  | (9) |  |  | (7) |  |  | (2) |  |  | — |  |
| Accretion Expense |  | 42 |  |  | — |  |  | 42 |  |  | — |  |
| Accretion Expense Deferred and Recovered in Rate Base (A) |  | 17 |  |  | 17 |  |  | — |  |  | — |  |
| Revision to Present Values of Estimated Cash Flows |  | 75 |  |  | 1 |  |  | 74 |  |  | — |  |
| ARO Liability as of December 31, 2020 |  | $ | 1,212 |  |  | $ | 314 |  |  | $ | 895 |  |  | $ | 3 |  |
(A)Not reflected as expense in Consolidated Statements of Operations

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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