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Accumulated Other Comprehensive Income (Loss), Net of Tax (Tables) | 9 Months Ended
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Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income by Component |
| PSEG |  | Three Months Ended September 30, 2020 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of June 30, 2020 |  | $ | (15) |  |  | $ | (493) |  |  | $ | 53 |  |  | $ | (455) |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | — |  |  | 3 |  |  | 3 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | 4 |  |  | 3 |  |  | (7) |  |  | — |  |
| Net Current Period Other Comprehensive Income (Loss) |  | 4 |  |  | 3 |  |  | (4) |  |  | 3 |  |
| Balance as of September 30, 2020 |  | $ | (11) |  |  | $ | (490) |  |  | $ | 49 |  |  | $ | (452) |  |
| PSEG |  | Three Months Ended September 30, 2019 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of June 30, 2019 |  | $ | (18) |  |  | $ | (437) |  |  | $ | 23 |  |  | $ | (432) |  |
| Other Comprehensive Income (Loss) before Reclassifications |  | — |  |  | (20) |  |  | 13 |  |  | (7) |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | 1 |  |  | 3 |  |  | (3) |  |  | 1 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | 1 |  |  | (17) |  |  | 10 |  |  | (6) |  |
| Balance as of September 30, 2019 |  | $ | (17) |  |  | $ | (454) |  |  | $ | 33 |  |  | $ | (438) |  |
| PSEG |  | Nine Months Ended September 30, 2020 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2019 |  | $ | (15) |  |  | $ | (499) |  |  | $ | 25 |  |  | $ | (489) |  |
| Other Comprehensive Income (Loss) before Reclassifications |  | (4) |  |  | — |  |  | 47 |  |  | 43 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | 8 |  |  | 9 |  |  | (23) |  |  | (6) |  |
| Net Current Period Other Comprehensive Income (Loss) |  | 4 |  |  | 9 |  |  | 24 |  |  | 37 |  |
| Balance as of September 30, 2020 |  | $ | (11) |  |  | $ | (490) |  |  | $ | 49 |  |  | $ | (452) |  |
| PSEG |  | Nine Months Ended September 30, 2019 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2018 |  | $ | (1) |  |  | $ | (360) |  |  | $ | (16) |  |  | $ | (377) |  |
| Cumulative Effect Adjustment to Reclassify Stranded Tax Effects Resulting in the Change in the Federal Corporate Income Tax to Retained Earnings |  | — |  |  | (81) |  |  | — |  |  | (81) |  |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income (Loss) before Reclassifications |  | (17) |  |  | (23) |  |  | 54 |  |  | 14 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | 1 |  |  | 10 |  |  | (5) |  |  | 6 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | (16) |  |  | (13) |  |  | 49 |  |  | 20 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | (16) |  |  | (94) |  |  | 49 |  |  | (61) |  |
| Balance as of September 30, 2019 |  | $ | (17) |  |  | $ | (454) |  |  | $ | 33 |  |  | $ | (438) |  |
| PSEG Power |  | Three Months Ended September 30, 2020 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of June 30, 2020 |  | $ | — |  |  | $ | (415) |  |  | $ | 41 |  |  | $ | (374) |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | — |  |  | 3 |  |  | 3 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 2 |  |  | (5) |  |  | (3) |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | 2 |  |  | (2) |  |  | — |  |
| Balance as of September 30, 2020 |  | $ | — |  |  | $ | (413) |  |  | $ | 39 |  |  | $ | (374) |  |
| PSEG Power |  | Three Months Ended September 30, 2019 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of June 30, 2019 |  | $ | — |  |  | $ | (372) |  |  | $ | 18 |  |  | $ | (354) |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (14) |  |  | 10 |  |  | (4) |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 2 |  |  | (3) |  |  | (1) |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (12) |  |  | 7 |  |  | (5) |  |
| Balance as of September 30, 2019 |  | $ | — |  |  | $ | (384) |  |  | $ | 25 |  |  | $ | (359) |  |
| PSEG Power |  | Nine Months Ended September 30, 2020 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2019 |  | $ | — |  |  | $ | (420) |  |  | $ | 19 |  |  | $ | (401) |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | — |  |  | 38 |  |  | 38 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 7 |  |  | (18) |  |  | (11) |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | 7 |  |  | 20 |  |  | 27 |  |
| Balance as of September 30, 2020 |  | $ | — |  |  | $ | (413) |  |  | $ | 39 |  |  | $ | (374) |  |
| PSEG Power |  | Nine Months Ended September 30, 2019 |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for-Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2018 |  | $ | — |  |  | $ | (306) |  |  | $ | (13) |  |  | $ | (319) |  |
| Cumulative Effect Adjustment to Reclassify Stranded Tax Effects Resulting in the Change in the Federal Corporate Income Tax to Retained Earnings |  | — |  |  | (69) |  |  | — |  |  | (69) |  |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income (Loss) before Reclassifications |  | — |  |  | (17) |  |  | 42 |  |  | 25 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 8 |  |  | (4) |  |  | 4 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (9) |  |  | 38 |  |  | 29 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | — |  |  | (78) |  |  | 38 |  |  | (40) |  |
| Balance as of September 30, 2019 |  | $ | — |  |  | $ | (384) |  |  | $ | 25 |  |  | $ | (359) |  |
Reclassifications out of Accumulated Other Comprehensive Income |
| PSEG |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  | Three Months Ended |  | Nine Months Ended |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations | September 30, 2020 |  | September 30, 2020 |
|  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  | Millions |
| Cash Flow Hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest Rate Swaps |  | Interest Expense | $ | (5) |  |  | $ | 1 |  |  | $ | (4) |  |  | $ | (11) |  |  | $ | 3 |  |  | $ | (8) |  |
| Total Cash Flow Hedges | (5) |  |  | 1 |  |  | (4) |  |  | (11) |  |  | 3 |  |  | (8) |  |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) | 6 |  |  | (2) |  |  | 4 |  |  | 18 |  |  | (5) |  |  | 13 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) | (10) |  |  | 3 |  |  | (7) |  |  | (30) |  |  | 8 |  |  | (22) |  |
| Total Pension and OPEB Plans | (4) |  |  | 1 |  |  | (3) |  |  | (12) |  |  | 3 |  |  | (9) |  |
| Available-for-Sale Debt Securities |  |  |  |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and Impairments |  | Net Gains (Losses) on Trust Investments | 11 |  |  | (4) |  |  | 7 |  |  | 37 |  |  | (14) |  |  | 23 |  |
| Total Available-for-Sale Debt Securities | 11 |  |  | (4) |  |  | 7 |  |  | 37 |  |  | (14) |  |  | 23 |  |
| Total |  |  | $ | 2 |  |  | $ | (2) |  |  | $ | — |  |  | $ | 14 |  |  | $ | (8) |  |  | $ | 6 |  |
| PSEG |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  | Three Months Ended |  | Nine Months Ended |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations | September 30, 2019 |  | September 30, 2019 |
|  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  | Millions |
| Cash Flow Hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest Rate Swaps |  | Interest Expense | $ | (1) |  |  | $ | — |  |  | $ | (1) |  |  | $ | (2) |  |  | $ | 1 |  |  | $ | (1) |  |
| Total Cash Flow Hedges | (1) |  |  | — |  |  | (1) |  |  | (2) |  |  | 1 |  |  | (1) |  |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) | 7 |  |  | (2) |  |  | 5 |  |  | 20 |  |  | (6) |  |  | 14 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) | (10) |  |  | 2 |  |  | (8) |  |  | (33) |  |  | 9 |  |  | (24) |  |
| Total Pension and OPEB Plans | (3) |  |  | — |  |  | (3) |  |  | (13) |  |  | 3 |  |  | (10) |  |
| Available-for-Sale Debt Securities |  |  |  |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) |  | Net Gains (Losses) on Trust Investments | 6 |  |  | (3) |  |  | 3 |  |  | 9 |  |  | (4) |  |  | 5 |  |
| Total Available-for-Sale Debt Securities | 6 |  |  | (3) |  |  | 3 |  |  | 9 |  |  | (4) |  |  | 5 |  |
| Total |  |  | $ | 2 |  |  | $ | (3) |  |  | $ | (1) |  |  | $ | (6) |  |  | $ | — |  |  | $ | (6) |  |
| PSEG Power |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  | Three Months Ended |  | Nine Months Ended |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations | September 30, 2020 |  | September 30, 2020 |
|  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  | Millions |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) | $ | 5 |  |  | $ | (2) |  |  | $ | 3 |  |  | $ | 16 |  |  | $ | (5) |  |  | $ | 11 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) | (8) |  |  | 3 |  |  | (5) |  |  | (25) |  |  | 7 |  |  | (18) |  |
| Total Pension and OPEB Plans | (3) |  |  | 1 |  |  | (2) |  |  | (9) |  |  | 2 |  |  | (7) |  |
| Available-for-Sale Debt Securities |  |  |  |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and Impairments |  | Net Gains (Losses) on Trust Investments | 9 |  |  | (4) |  |  | 5 |  |  | 30 |  |  | (12) |  |  | 18 |  |
| Total Available-for-Sale Debt Securities | 9 |  |  | (4) |  |  | 5 |  |  | 30 |  |  | (12) |  |  | 18 |  |
| Total |  |  | $ | 6 |  |  | $ | (3) |  |  | $ | 3 |  |  | $ | 21 |  |  | $ | (10) |  |  | $ | 11 |  |
| PSEG Power |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  | Three Months Ended |  | Nine Months Ended |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations | September 30, 2019 |  | September 30, 2019 |
|  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  | Millions |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) | $ | 6 |  |  | $ | (2) |  |  | $ | 4 |  |  | $ | 17 |  |  | $ | (5) |  |  | $ | 12 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) | (9) |  |  | 3 |  |  | (6) |  |  | (28) |  |  | 8 |  |  | (20) |  |
| Total Pension and OPEB Plans | (3) |  |  | 1 |  |  | (2) |  |  | (11) |  |  | 3 |  |  | (8) |  |
| Available-for-Sale Debt Securities |  |  |  |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) |  | Net Gains (Losses) on Trust Investments | 5 |  |  | (2) |  |  | 3 |  |  | 7 |  |  | (3) |  |  | 4 |  |
| Total Available-for-Sale Debt Securities | 5 |  |  | (2) |  |  | 3 |  |  | 7 |  |  | (3) |  |  | 4 |  |
| Total |  |  | $ | 2 |  |  | $ | (1) |  |  | $ | 1 |  |  | $ | (4) |  |  | $ | — |  |  | $ | (4) |  |

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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