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Asset Retirement Obligations (AROs) (Tables) | 12 Months Ended
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Dec. 31, 2017
Asset Retirement Obligation [Abstract] |
Impact Of The Revisions On Asset Retirement Obligation | The changes to the ARO liabilities for PSEG, PSE&G and Power during 2016 and 2017 are presented in the following table:
|  |  | PSEG |  | PSE&G |  | Power |  | Other |
|  |  | Millions |
| ARO Liability as of January 1, 2016 |  | $ | 679 |  |  | $ | 218 |  |  | $ | 457 |  |  | $ | 4 |  |
| Liabilities Settled |  | (13 | ) |  | (9 | ) |  | (4 | ) |  | — |  |
| Liabilities Incurred |  | 25 |  |  | 2 |  |  | 23 |  |  | — |  |
| Accretion Expense |  | 26 |  |  | — |  |  | 26 |  |  | — |  |
| Accretion Expense Deferred and Recovered in Rate Base (A) |  | 12 |  |  | 12 |  |  | — |  |  | — |  |
| Revision to Present Values of Estimated Cash Flows |  | (3 | ) |  | (10 | ) |  | 9 |  |  | (2 | ) |
| ARO Liability as of December 31, 2016 |  | $ | 726 |  |  | $ | 213 |  |  | $ | 511 |  |  | $ | 2 |  |
| Liabilities Settled |  | (29 | ) |  | (8 | ) |  | (21 | ) |  | — |  |
| Liabilities Incurred |  | 1 |  |  | — |  |  | 1 |  |  | — |  |
| Accretion Expense |  | 30 |  |  | — |  |  | 30 |  |  | — |  |
| Accretion Expense Deferred and Recovered in Rate Base (A) |  | 12 |  |  | 12 |  |  | — |  |  | — |  |
| Revision to Present Values of Estimated Cash Flows |  | 284 |  |  | (5 | ) |  | 289 |  |  | — |  |
| ARO Liability as of December 31, 2017 |  | $ | 1,024 |  |  | $ | 212 |  |  | $ | 810 |  |  | $ | 2 |  |
(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://www.xbrl.org/2003/role/presentationRef -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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