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Income Taxes (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Income Taxes [Line Items] |
Unrecognized Tax Benefits |
| 2018 |  | PSEG |  | PSE&G |  | Power |  | Energy Holdings |
|  |  | Millions |
| Total Amount of Unrecognized Tax Benefits as of January 1, 2018 |  | $ | 334 |  |  | $ | 135 |  |  | $ | 142 |  |  | $ | 53 |  |
| Increases as a Result of Positions Taken in a Prior Period |  | 11 |  |  | 4 |  |  | 4 |  |  | 3 |  |
| Decreases as a Result of Positions Taken in a Prior Period |  | (70 | ) |  | (31 | ) |  | (37 | ) |  | (2 | ) |
| Increases as a Result of Positions Taken during the Current Period |  | 52 |  |  | 3 |  |  | 48 |  |  | — |  |
| Decreases as a Result of Positions Taken during the Current Period |  | (3 | ) |  | (3 | ) |  | — |  |  | — |  |
| Decreases as a Result of Settlements with Taxing Authorities |  | (6 | ) |  | — |  |  | (6 | ) |  | — |  |
| Decreases due to Lapses of Applicable Statute of Limitations |  | — |  |  | — |  |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits as of December 31, 2018 |  | $ | 318 |  |  | $ | 108 |  |  | $ | 151 |  |  | $ | 54 |  |
| Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits |  | (173 | ) |  | (57 | ) |  | (104 | ) |  | (12 | ) |
| Regulatory Asset—Unrecognized Tax Benefits |  | (46 | ) |  | (46 | ) |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits that if Recognized, would Impact the Effective Tax Rate (including Interest and Penalties) |  | $ | 99 |  |  | $ | 5 |  |  | $ | 47 |  |  | $ | 42 |  |
| 2017 |  | PSEG |  | PSE&G |  | Power |  | Energy Holdings |
|  |  | Millions |
| Total Amount of Unrecognized Tax Benefits as of January 1, 2017 |  | $ | 328 |  |  | $ | 140 |  |  | $ | 128 |  |  | $ | 57 |  |
| Increases as a Result of Positions Taken in a Prior Period |  | 40 |  |  | 15 |  |  | 18 |  |  | 8 |  |
| Decreases as a Result of Positions Taken in a Prior Period |  | (32 | ) |  | (11 | ) |  | (10 | ) |  | (13 | ) |
| Increases as a Result of Positions Taken during the Current Period |  | 12 |  |  | 5 |  |  | 6 |  |  | 1 |  |
| Decreases as a Result of Positions Taken during the Current Period |  | (1 | ) |  | (1 | ) |  | — |  |  | — |  |
| Decreases as a Result of Settlements with Taxing Authorities |  | — |  |  | — |  |  | — |  |  | — |  |
| Decreases due to Lapses of Applicable Statute of Limitations |  | (13 | ) |  | (13 | ) |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits as of December 31, 2017 |  | $ | 334 |  |  | $ | 135 |  |  | $ | 142 |  |  | $ | 53 |  |
| Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits |  | (157 | ) |  | (73 | ) |  | (72 | ) |  | (12 | ) |
| Regulatory Asset—Unrecognized Tax Benefits |  | (56 | ) |  | (56 | ) |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits that if Recognized, would Impact the Effective Tax Rate (including Interest and Penalties) |  | $ | 121 |  |  | $ | 6 |  |  | $ | 70 |  |  | $ | 41 |  |
| 2016 |  | PSEG |  | PSE&G |  | Power |  | Energy Holdings |
|  |  | Millions |
| Total Amount of Unrecognized Tax Benefits as of January 1, 2016 |  | $ | 386 |  |  | $ | 181 |  |  | $ | 111 |  |  | $ | 93 |  |
| Increases as a Result of Positions Taken in a Prior Period |  | 12 |  |  | 3 |  |  | 6 |  |  | 2 |  |
| Decreases as a Result of Positions Taken in a Prior Period |  | (62 | ) |  | (23 | ) |  | (1 | ) |  | (38 | ) |
| Increases as a Result of Positions Taken during the Current Period |  | 19 |  |  | 6 |  |  | 12 |  |  | — |  |
| Decreases as a Result of Positions Taken during the Current Period |  | — |  |  | — |  |  | — |  |  | — |  |
| Decreases as a Result of Settlements with Taxing Authorities |  | — |  |  | — |  |  | — |  |  | — |  |
| Decreases due to Lapses of Applicable Statute of Limitations |  | (27 | ) |  | (27 | ) |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits as of December 31, 2016 |  | $ | 328 |  |  | $ | 140 |  |  | $ | 128 |  |  | $ | 57 |  |
| Accumulated Deferred Income Taxes Associated with Unrecognized Tax Benefits |  | (200 | ) |  | (106 | ) |  | (74 | ) |  | (20 | ) |
| Regulatory Asset—Unrecognized Tax Benefits |  | (31 | ) |  | (31 | ) |  | — |  |  | — |  |
| Total Amount of Unrecognized Tax Benefits that if Recognized, would Impact the Effective Tax Rate (including Interest and Penalties) |  | $ | 97 |  |  | $ | 3 |  |  | $ | 54 |  |  | $ | 37 |  |
Interest And Penalties Related To Uncertain Tax Positions | PSEG and its subsidiaries include accrued interest and penalties related to uncertain tax positions required to be recorded, as Income Tax Expense in the Consolidated Statements of Operations. Accumulated interest and penalties that are recorded on the Consolidated Balance Sheets on uncertain tax positions were as follows:
|  |  | Accumulated Interest and Penalties on Uncertain Tax Positions as of December 31, |
|  |  | 2018 |  | 2017 |  | 2016 |
|  |  | Millions |
| PSE&G |  | $ | 12 |  |  | $ | 25 |  |  | $ | 22 |  |
| Power |  | 9 |  |  | 24 |  |  | 17 |  |
| Energy Holdings |  | 22 |  |  | 21 |  |  | 20 |  |
| Total |  | $ | 43 |  |  | $ | 70 |  |  | $ | 59 |  |
Possible Decrease In Total Unrecognized Tax Benefits Including Interest | t is reasonably possible that total unrecognized tax benefits will significantly increase or decrease within the next twelve months due to either agreements with various taxing authorities upon audit, the expiration of the Statute of Limitations, or other pending tax matters. These potential increases or decreases are as follows:
| Possible (Increase)/Decrease in Total Unrecognized Tax Benefits |  | Over the next 12 Months |
|  |  | Millions |
| PSEG |  | $ | 112 |  |
| PSE&G |  | $ | 62 |  |
| Power |  | $ | 34 |  |
Description Of Income Tax Years By Material Jurisdictions | A description of income tax years that remain subject to examination by material jurisdictions, where an examination has not already concluded are:
|  |  | PSEG |  | PSE&G |  | Power |
| United States |  |  |  |  |  |  |
| Federal |  | 2011-2017 |  | N/A |  | N/A |
| New Jersey |  | 2006-2017 |  | 2011-2017 |  | N/A |
| Pennsylvania |  | 2015-2017 |  | 2015-2017 |  | N/A |
| Connecticut |  | 2016-2017 |  | N/A |  | N/A |
| California |  | 2006-2017 |  | N/A |  | N/A |
| New York |  | 2017 |  | N/A |  | 2017 |
PSEG [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of reported income tax expense for PSEG with the amount computed by multiplying pre-tax income by the statutory federal income tax rate of 21% in 2018 and 35% in 2017 and 2016 is as follows:
|  |  | Years Ended December 31, |
| PSEG |  | 2018 |  | 2017 |  | 2016 |
|  |  | Millions |
| Net Income |  | $ | 1,438 |  |  | $ | 1,574 |  |  | $ | 887 |  |
| Income Taxes: |  |  |  |  |  |  |
| Operating Income: |  |  |  |  |  |  |
| Current (Benefit) Expense: |  |  |  |  |  |  |
| Federal |  | $ | (97 | ) |  | $ | 86 |  |  | $ | (74 | ) |
| State |  | 83 |  |  | (31 | ) |  | 61 |  |
| Total Current |  | (14 | ) |  | 55 |  |  | (13 | ) |
| Deferred Expense (Benefit): |  |  |  |  |  |  |
| Federal |  | 373 |  |  | (482 | ) |  | 311 |  |
| State |  | 71 |  |  | 92 |  |  | 28 |  |
| Total Deferred |  | 444 |  |  | (390 | ) |  | 339 |  |
| Investment Tax Credit (ITC) |  | (13 | ) |  | 29 |  |  | 85 |  |
| Total Income Tax Expense (Benefit) |  | $ | 417 |  |  | $ | (306 | ) |  | $ | 411 |  |
| Pre-Tax Income |  | $ | 1,855 |  |  | $ | 1,268 |  |  | $ | 1,298 |  |
| Tax Computed at Statutory Rate @ 21% in 2018 and 35% in 2017 and 2016 |  | $ | 390 |  |  | $ | 444 |  |  | $ | 454 |  |
| Increase (Decrease) Attributable to Flow-Through of Certain Tax Adjustments: |  |  |  |  |  |  |
| State Income Taxes (net of federal income tax) |  | 123 |  |  | 36 |  |  | 56 |  |
| Uncertain Tax Positions |  | (24 | ) |  | (3 | ) |  | (31 | ) |
| Manufacturing Deduction |  | — |  |  | (13 | ) |  | (17 | ) |
| NDT Fund |  | (13 | ) |  | 19 |  |  | 3 |  |
| Plant-Related Items |  | (10 | ) |  | (23 | ) |  | (20 | ) |
| Tax Credits |  | (16 | ) |  | (22 | ) |  | (25 | ) |
| Audit Settlement |  | — |  |  | 6 |  |  | — |  |
| Tax Adjustment Credit |  | (30 | ) |  | — |  |  | — |  |
| Deferred Tax Expense (Benefit) - Tax Act |  | 3 |  |  | (755 | ) |  | — |  |
| Other |  | (6 | ) |  | 5 |  |  | (9 | ) |
| Sub-Total |  | 27 |  |  | (750 | ) |  | (43 | ) |
| Total Income Tax Expense (Benefit) |  | $ | 417 |  |  | $ | (306 | ) |  | $ | 411 |  |
| Effective Income Tax Rate |  | 22.5 | % |  | (24.1 | )% |  | 31.7 | % |
Deferred Income Taxes | The following is an analysis of deferred income taxes for PSEG:
|  |  | As of December 31, |
| PSEG |  | 2018 |  | 2017 |
|  |  | Millions |
| Deferred Income Taxes |  |  |  |  |
| Assets: |  |  |  |  |
| Noncurrent |  |  |  |  |
| Regulatory Liability Excess Deferred Tax |  | $ | 606 |  |  | $ | 602 |  |
| OPEB |  | 163 |  |  | 217 |  |
| Related to Uncertain Tax Position |  | 71 |  |  | 142 |  |
| Total Noncurrent Assets |  | $ | 840 |  |  | $ | 961 |  |
| Liabilities: |  |  |  |  |
| Noncurrent: |  |  |  |  |
| Plant-Related Items |  | $ | 4,817 |  |  | $ | 4,257 |  |
| New Jersey Corporate Business Tax |  | 756 |  |  | 674 |  |
| Leasing Activities |  | 307 |  |  | 384 |  |
| AROs and NDT Fund |  | 196 |  |  | 233 |  |
| Pension Costs |  | 111 |  |  | 123 |  |
| Taxes Recoverable Through Future Rates (net) |  | 89 |  |  | 80 |  |
| Other |  | 12 |  |  | 171 |  |
| Total Noncurrent Liabilities |  | $ | 6,288 |  |  | $ | 5,922 |  |
| Summary of Accumulated Deferred Income Taxes: |  |  |  |  |
| Net Noncurrent Deferred Income Tax Liabilities |  | $ | 5,448 |  |  | $ | 4,961 |  |
| ITC |  | 265 |  |  | 279 |  |
| Net Total Noncurrent Deferred Income Taxes and ITC |  | $ | 5,713 |  |  | $ | 5,240 |  |
The deferred tax effect of certain assets and liabilities is presented in the table above net of the deferred tax effect associated with the respective regulatory deferrals. In December 2017, new tax legislation was enacted, reducing the statutory U.S. corporate income tax rate from a maximum of 35% to 21%, effective January 1, 2018. PSEG is subject to ASC 740, which requires that the effect on deferred tax assets and liabilities of a change in tax rates be recognized in the period the tax rate was enacted.
PSE&G [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of reported income tax expense for PSE&G with the amount computed by multiplying pre-tax income by the statutory federal income tax rate of 21% in 2018 and 35% in 2017 and 2016 is as follows:
|  |  | Years Ended December 31, |
| PSE&G |  | 2018 |  | 2017 |  | 2016 |
|  |  | Millions |
| Net Income |  | $ | 1,067 |  |  | $ | 973 |  |  | $ | 889 |  |
| Income Taxes: |  |  |  |  |  |  |
| Operating Income: |  |  |  |  |  |  |
| Current (Benefit) Expense: |  |  |  |  |  |  |
| Federal |  | $ | (62 | ) |  | $ | (52 | ) |  | $ | (153 | ) |
| State |  | 1 |  |  | (1 | ) |  | 10 |  |
| Total Current |  | (61 | ) |  | (53 | ) |  | (143 | ) |
| Deferred Expense: |  |  |  |  |  |  |
| Federal |  | 287 |  |  | 492 |  |  | 551 |  |
| State |  | 122 |  |  | 129 |  |  | 102 |  |
| Total Deferred |  | 409 |  |  | 621 |  |  | 653 |  |
| ITC |  | (4 | ) |  | (5 | ) |  | 5 |  |
| Total Income Tax Expense |  | $ | 344 |  |  | $ | 563 |  |  | $ | 515 |  |
| Pre-Tax Income |  | $ | 1,411 |  |  | $ | 1,536 |  |  | $ | 1,404 |  |
| Tax Computed at Statutory Rate @ 21% in 2018 and 35% in 2017 and 2016 |  | $ | 296 |  |  | $ | 538 |  |  | $ | 491 |  |
| Increase (Decrease) Attributable to Flow-Through of Certain Tax Adjustments: |  |  |  |  |  |  |
| State Income Taxes (net of federal income tax) |  | 98 |  |  | 83 |  |  | 72 |  |
| Uncertain Tax Positions |  | (1 | ) |  | (9 | ) |  | (18 | ) |
| Plant-Related Items |  | (10 | ) |  | (23 | ) |  | (20 | ) |
| Tax Credits |  | (8 | ) |  | (9 | ) |  | (7 | ) |
| Tax Adjustment Credit |  | (30 | ) |  | — |  |  | — |  |
| Deferred Tax Benefit - Tax Act |  | — |  |  | (10 | ) |  | — |  |
| Other |  | (1 | ) |  | (7 | ) |  | (3 | ) |
| Sub-Total |  | 48 |  |  | 25 |  |  | 24 |  |
| Total Income Tax Expense |  | $ | 344 |  |  | $ | 563 |  |  | $ | 515 |  |
| Effective Income Tax Rate |  | 24.4 | % |  | 36.7 | % |  | 36.7 | % |
Deferred Income Taxes | The following is an analysis of deferred income taxes for PSE&G:
|  |  | As of December 31, |
| PSE&G |  | 2018 |  | 2017 |
|  |  | Millions |
| Deferred Income Taxes |  |  |  |  |
| Assets: |  |  |  |  |
| Noncurrent: |  |  |  |  |
| Regulatory Liability Excess Deferred Tax |  | $ | 606 |  |  | $ | 602 |  |
| OPEB |  | 114 |  |  | 116 |  |
| Total Noncurrent Assets |  | $ | 720 |  |  | $ | 718 |  |
| Liabilities: |  |  |  |  |
| Noncurrent: |  |  |  |  |
| Plant-Related Items |  | $ | 3,622 |  |  | $ | 3,311 |  |
| New Jersey Corporate Business Tax |  | 486 |  |  | 378 |  |
| Pension Costs |  | 159 |  |  | 152 |  |
| Conservation Costs |  | 36 |  |  | 24 |  |
| Taxes Recoverable Through Future Rates (net) |  | 89 |  |  | 80 |  |
| Other |  | 84 |  |  | 86 |  |
| Total Noncurrent Liabilities |  | $ | 4,476 |  |  | $ | 4,031 |  |
| Summary of Accumulated Deferred Income Taxes: |  |  |  |  |
| Net Noncurrent Deferred Income Tax Liabilities |  | $ | 3,756 |  |  | $ | 3,313 |  |
| ITC |  | 74 |  |  | 78 |  |
| Net Total Noncurrent Deferred Income Taxes and ITC |  | $ | 3,830 |  |  | $ | 3,391 |  |
The deferred tax effect of certain assets and liabilities is presented in the table above net of the deferred tax effect associated with the respective regulatory deferrals. In December 2017, new tax legislation was enacted, reducing the statutory U.S. corporate income tax rate from a maximum of 35% to 21%, effective January 1, 2018. PSE&G is subject to ASC 740, which requires that the effect on deferred tax assets and liabilities of a change in tax rates be recognized in the period the tax rate was enacted.
Power [Member] |
Income Taxes [Line Items] |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of reported income tax expense for Power with the amount computed by multiplying pre-tax income by the statutory federal income tax rate of 21% in 2018 and 35% in 2017 and 2016 is as follows:
|  |  | Years Ended December 31, |
| Power |  | 2018 |  | 2017 |  | 2016 |
|  |  | Millions |
| Net Income |  | $ | 365 |  |  | $ | 479 |  |  | $ | 18 |  |
| Income Taxes: |  |  |  |  |  |  |
| Operating Income: |  |  |  |  |  |  |
| Current (Benefit) Expense: |  |  |  |  |  |  |
| Federal |  | $ | (164 | ) |  | $ | 95 |  |  | $ | 107 |  |
| State |  | 24 |  |  | (17 | ) |  | 40 |  |
| Total Current |  | (140 | ) |  | 78 |  |  | 147 |  |
| Deferred Expense (Benefit): |  |  |  |  |  |  |
| Federal |  | 214 |  |  | (804 | ) |  | (222 | ) |
| State |  | 1 |  |  | (37 | ) |  | (68 | ) |
| Total Deferred |  | 215 |  |  | (841 | ) |  | (290 | ) |
| ITC |  | (9 | ) |  | 34 |  |  | 82 |  |
| Total Income Tax Expense (Benefit) |  | $ | 66 |  |  | $ | (729 | ) |  | $ | (61 | ) |
| Pre-Tax Income (Loss) |  | $ | 431 |  |  | $ | (250 | ) |  | $ | (43 | ) |
| Tax Computed at Statutory Rate @ 21% in 2018 and 35% in 2017 and 2016 |  | $ | 91 |  |  | $ | (88 | ) |  | $ | (15 | ) |
| Increase (Decrease) Attributable to Flow-Through of Certain Tax Adjustments: |  |  |  |  |  |  |
| State Income Taxes (net of federal income tax) |  | 21 |  |  | (36 | ) |  | (18 | ) |
| Manufacturing Deduction |  | — |  |  | (13 | ) |  | (17 | ) |
| NDT Fund |  | (13 | ) |  | 19 |  |  | 3 |  |
| Tax Credits |  | (7 | ) |  | (12 | ) |  | (18 | ) |
| Uncertain Tax Positions |  | (24 | ) |  | 7 |  |  | 9 |  |
| Audit Settlement |  | — |  |  | 1 |  |  | — |  |
| Deferred Tax Benefit - Tax Act |  | (1 | ) |  | (610 | ) |  | — |  |
| Other |  | (1 | ) |  | 3 |  |  | (5 | ) |
| Sub-Total |  | (25 | ) |  | (641 | ) |  | (46 | ) |
| Total Income Tax Expense (Benefit) |  | $ | 66 |  |  | $ | (729 | ) |  | $ | (61 | ) |
| Effective Income Tax Rate |  | 15.3 | % |  | 291.6 | % |  | 141.9 | % |
Deferred Income Taxes | The following is an analysis of deferred income taxes for Power:
|  |  | As of December 31, |
| Power |  | 2018 |  | 2017 |
|  |  | Millions |
| Deferred Income Taxes |  |  |  |  |
| Assets: |  |  |  |  |
| Noncurrent: |  |  |  |  |
| Related to Uncertain Tax Positions |  | $ | 60 |  |  | $ | 45 |  |
| Pension Costs |  | 52 |  |  | 40 |  |
| Contractual Liabilities & Environmental Costs |  | 9 |  |  | 12 |  |
| Other |  | 98 |  |  | 93 |  |
| Total Noncurrent Assets |  | $ | 219 |  |  | $ | 190 |  |
| Liabilities: |  |  |  |  |
| Noncurrent: |  |  |  |  |
| Plant-Related Items |  | $ | 1,189 |  |  | $ | 935 |  |
| AROs and NDT Fund |  | 197 |  |  | 235 |  |
| New Jersey Corporate Business Tax |  | 260 |  |  | 225 |  |
| Total Noncurrent Liabilities |  | $ | 1,646 |  |  | $ | 1,395 |  |
| Summary of Accumulated Deferred Income Taxes: |  |  |  |  |
| Net Noncurrent Deferred Income Tax Liabilities |  | $ | 1,427 |  |  | $ | 1,205 |  |
| ITC |  | 192 |  |  | 201 |  |
| Net Total Noncurrent Deferred Income Taxes and ITC |  | $ | 1,619 |  |  | $ | 1,406 |  |

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- Definition Tabular disclosure of income tax examinations that an enterprise is currently subject to or that have been completed in the current period typically including a description of the examination, the jurisdiction conducting the examination, the tax year(s) under examination, the likelihood of an unfavorable settlement, the range of possible losses, the liability recorded, the increase or decrease in the liability from the prior period, and any penalties and interest that have been recorded. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=109238393&loc=d3e36027-109320 + Details
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Data Type: | na
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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Name: | dei_LegalEntityAxis=pseg_PowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |