XML 65 R31.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax | 12 Months Ended
--- | ---
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated Other Comprehensive Income (Loss), Net of Tax | Accumulated Other Comprehensive Income (Loss), Net of Tax
| PSEG |  | Other Comprehensive Income (Loss) |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for -Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2015 |  | $ | — |  |  | $ | (386 | ) |  | $ | 91 |  |  | $ | (295 | ) |
| Other Comprehensive Income before Reclassifications |  | 2 |  |  | (45 | ) |  | 40 |  |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 33 |  |  | 2 |  |  | 35 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | 2 |  |  | (12 | ) |  | 42 |  |  | 32 |  |
| Balance as of December 31, 2016 |  | $ | 2 |  |  | $ | (398 | ) |  | $ | 133 |  |  | $ | (263 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (32 | ) |  | 109 |  |  | 77 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (2 | ) |  | 24 |  |  | (65 | ) |  | (43 | ) |
| Net Current Period Other Comprehensive Income (Loss) |  | (2 | ) |  | (8 | ) |  | 44 |  |  | 34 |  |
| Balance as of December 31, 2017 |  | $ | — |  |  | $ | (406 | ) |  | $ | 177 |  |  | $ | (229 | ) |
| Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings |  | — |  |  | — |  |  | (176 | ) |  | (176 | ) |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income before Reclassifications |  | (1 | ) |  | 17 |  |  | (25 | ) |  | (9 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 29 |  |  | 8 |  |  | 37 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | (1 | ) |  | 46 |  |  | (17 | ) |  | 28 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | (1 | ) |  | 46 |  |  | (193 | ) |  | (148 | ) |
| Balance as of December 31, 2018 |  | $ | (1 | ) |  | $ | (360 | ) |  | $ | (16 | ) |  | $ | (377 | ) |
| Power |  | Other Comprehensive Income (Loss) |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for -Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2015 |  | $ | — |  |  | $ | (327 | ) |  | $ | 87 |  |  | $ | (240 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (42 | ) |  | 39 |  |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 29 |  |  | 3 |  |  | 32 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (13 | ) |  | 42 |  |  | 29 |  |
| Balance as of December 31, 2016 |  | $ | — |  |  | $ | (340 | ) |  | $ | 129 |  |  | $ | (211 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (28 | ) |  | 106 |  |  | 78 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 21 |  |  | (60 | ) |  | (39 | ) |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (7 | ) |  | 46 |  |  | 39 |  |
| Balance as of December 31, 2017 |  | $ | — |  |  | $ | (347 | ) |  | $ | 175 |  |  | $ | (172 | ) |
| Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings |  | — |  |  | — |  |  | (175 | ) |  | (175 | ) |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | 16 |  |  | (19 | ) |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 25 |  |  | 6 |  |  | 31 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | 41 |  |  | (13 | ) |  | 28 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 41 |  |  | (188 | ) |  | (147 | ) |
| Balance as of December 31, 2018 |  | $ | — |  |  | $ | (306 | ) |  | $ | (13 | ) |  | $ | (319 | ) |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2016 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 12 |  |  | $ | (5 | ) |  | $ | 7 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (68 | ) |  | 28 |  |  | (40 | ) |
| Total Pension and OPEB Plans |  |  |  | (56 | ) |  | 23 |  |  | (33 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and Other-Than-Temporary Impairments (OTTI) |  | Net Gains (Losses) on Trust Investments |  | (6 | ) |  | 4 |  |  | (2 | ) |
| Total Available-for-Sale Securities |  |  |  | (6 | ) |  | 4 |  |  | (2 | ) |
| Total |  |  |  | $ | (62 | ) |  | $ | 27 |  |  | $ | (35 | ) |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2016 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 11 |  |  | $ | (5 | ) |  | $ | 6 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (59 | ) |  | 24 |  |  | (35 | ) |
| Total Pension and OPEB Plans |  |  |  | (48 | ) |  | 19 |  |  | (29 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (6 | ) |  | 3 |  |  | (3 | ) |
| Total Available-for-Sale Securities |  |  |  | (6 | ) |  | 3 |  |  | (3 | ) |
| Total |  |  |  | $ | (54 | ) |  | $ | 22 |  |  | $ | (32 | ) |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2017 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  |  | Millions |
| Cash Flow Hedges |  |  |  |  |  |  |  |  |
| Interest Rate Swaps |  | Interest Expense |  | $ | 3 |  |  | $ | (1 | ) |  | $ | 2 |  |
| Total Cash Flow Hedges |  |  |  | 3 |  |  | (1 | ) |  | 2 |  |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) |  | 10 |  |  | (4 | ) |  | 6 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (51 | ) |  | 21 |  |  | (30 | ) |
| Total Pension and OPEB Plans |  |  |  | (41 | ) |  | 17 |  |  | (24 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | 134 |  |  | (69 | ) |  | 65 |  |
| Total Available-for-Sale Securities |  |  |  | 134 |  |  | (69 | ) |  | 65 |  |
| Total |  |  |  | $ | 96 |  |  | $ | (53 | ) |  | $ | 43 |  |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2017 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 9 |  |  | $ | (4 | ) |  | $ | 5 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (44 | ) |  | 18 |  |  | (26 | ) |
| Total Pension and OPEB Plans |  |  |  | (35 | ) |  | 14 |  |  | (21 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | 125 |  |  | (65 | ) |  | 60 |  |
| Total Available-for-Sale Securities |  |  |  | 125 |  |  | (65 | ) |  | 60 |  |
| Total |  |  |  | $ | 90 |  |  | $ | (51 | ) |  | $ | 39 |  |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2018 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (47 | ) |  | 14 |  |  | (33 | ) |
| Total Pension and OPEB Plans |  |  |  | (41 | ) |  | 12 |  |  | (29 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (13 | ) |  | 5 |  |  | (8 | ) |
| Total Available-for-Sale Securities |  |  |  | (13 | ) |  | 5 |  |  | (8 | ) |
| Total |  |  |  | $ | (54 | ) |  | $ | 17 |  |  | $ | (37 | ) |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2018 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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 |  |  | $ | (1 | ) |  | $ | 4 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (40 | ) |  | 11 |  |  | (29 | ) |
| Total Pension and OPEB Plans |  |  |  | (35 | ) |  | 10 |  |  | (25 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (11 | ) |  | 5 |  |  | (6 | ) |
| Total Available-for-Sale Securities |  |  |  | (11 | ) |  | 5 |  |  | (6 | ) |
| Total |  |  |  | $ | (46 | ) |  | $ | 15 |  |  | $ | (31 | ) |
Power [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated Other Comprehensive Income (Loss), Net of Tax | Accumulated Other Comprehensive Income (Loss), Net of Tax
| PSEG |  | Other Comprehensive Income (Loss) |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for -Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2015 |  | $ | — |  |  | $ | (386 | ) |  | $ | 91 |  |  | $ | (295 | ) |
| Other Comprehensive Income before Reclassifications |  | 2 |  |  | (45 | ) |  | 40 |  |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 33 |  |  | 2 |  |  | 35 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | 2 |  |  | (12 | ) |  | 42 |  |  | 32 |  |
| Balance as of December 31, 2016 |  | $ | 2 |  |  | $ | (398 | ) |  | $ | 133 |  |  | $ | (263 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (32 | ) |  | 109 |  |  | 77 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (2 | ) |  | 24 |  |  | (65 | ) |  | (43 | ) |
| Net Current Period Other Comprehensive Income (Loss) |  | (2 | ) |  | (8 | ) |  | 44 |  |  | 34 |  |
| Balance as of December 31, 2017 |  | $ | — |  |  | $ | (406 | ) |  | $ | 177 |  |  | $ | (229 | ) |
| Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings |  | — |  |  | — |  |  | (176 | ) |  | (176 | ) |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income before Reclassifications |  | (1 | ) |  | 17 |  |  | (25 | ) |  | (9 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 29 |  |  | 8 |  |  | 37 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | (1 | ) |  | 46 |  |  | (17 | ) |  | 28 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | (1 | ) |  | 46 |  |  | (193 | ) |  | (148 | ) |
| Balance as of December 31, 2018 |  | $ | (1 | ) |  | $ | (360 | ) |  | $ | (16 | ) |  | $ | (377 | ) |
| Power |  | Other Comprehensive Income (Loss) |
| Accumulated Other Comprehensive Income (Loss) |  | Cash Flow Hedges |  | Pension and OPEB Plans |  | Available-for -Sale Securities |  | Total |
|  |  | Millions |
| Balance as of December 31, 2015 |  | $ | — |  |  | $ | (327 | ) |  | $ | 87 |  |  | $ | (240 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (42 | ) |  | 39 |  |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 29 |  |  | 3 |  |  | 32 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (13 | ) |  | 42 |  |  | 29 |  |
| Balance as of December 31, 2016 |  | $ | — |  |  | $ | (340 | ) |  | $ | 129 |  |  | $ | (211 | ) |
| Other Comprehensive Income before Reclassifications |  | — |  |  | (28 | ) |  | 106 |  |  | 78 |  |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 21 |  |  | (60 | ) |  | (39 | ) |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | (7 | ) |  | 46 |  |  | 39 |  |
| Balance as of December 31, 2017 |  | $ | — |  |  | $ | (347 | ) |  | $ | 175 |  |  | $ | (172 | ) |
| Cumulative Effect Adjustment to Reclassify Unrealized Net Gains on Equity Investments to Retained Earnings |  | — |  |  | — |  |  | (175 | ) |  | (175 | ) |
| Current Period Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |  |
| Other Comprehensive Income before Reclassifications |  | — |  |  | 16 |  |  | (19 | ) |  | (3 | ) |
| Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 25 |  |  | 6 |  |  | 31 |  |
| Net Current Period Other Comprehensive Income (Loss) |  | — |  |  | 41 |  |  | (13 | ) |  | 28 |  |
| Net Change in Accumulated Other Comprehensive Income (Loss) |  | — |  |  | 41 |  |  | (188 | ) |  | (147 | ) |
| Balance as of December 31, 2018 |  | $ | — |  |  | $ | (306 | ) |  | $ | (13 | ) |  | $ | (319 | ) |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2016 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 12 |  |  | $ | (5 | ) |  | $ | 7 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (68 | ) |  | 28 |  |  | (40 | ) |
| Total Pension and OPEB Plans |  |  |  | (56 | ) |  | 23 |  |  | (33 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and Other-Than-Temporary Impairments (OTTI) |  | Net Gains (Losses) on Trust Investments |  | (6 | ) |  | 4 |  |  | (2 | ) |
| Total Available-for-Sale Securities |  |  |  | (6 | ) |  | 4 |  |  | (2 | ) |
| Total |  |  |  | $ | (62 | ) |  | $ | 27 |  |  | $ | (35 | ) |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2016 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 11 |  |  | $ | (5 | ) |  | $ | 6 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (59 | ) |  | 24 |  |  | (35 | ) |
| Total Pension and OPEB Plans |  |  |  | (48 | ) |  | 19 |  |  | (29 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (6 | ) |  | 3 |  |  | (3 | ) |
| Total Available-for-Sale Securities |  |  |  | (6 | ) |  | 3 |  |  | (3 | ) |
| Total |  |  |  | $ | (54 | ) |  | $ | 22 |  |  | $ | (32 | ) |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2017 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | Pre-Tax Amount |  | Tax (Expense) Benefit |  | After-Tax Amount |
|  |  |  |  | Millions |
| Cash Flow Hedges |  |  |  |  |  |  |  |  |
| Interest Rate Swaps |  | Interest Expense |  | $ | 3 |  |  | $ | (1 | ) |  | $ | 2 |  |
| Total Cash Flow Hedges |  |  |  | 3 |  |  | (1 | ) |  | 2 |  |
| Pension and OPEB Plans |  |  |  |  |  |  |  |  |
| Amortization of Prior Service (Cost) Credit |  | Non-Operating Pension and OPEB Credits (Costs) |  | 10 |  |  | (4 | ) |  | 6 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (51 | ) |  | 21 |  |  | (30 | ) |
| Total Pension and OPEB Plans |  |  |  | (41 | ) |  | 17 |  |  | (24 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | 134 |  |  | (69 | ) |  | 65 |  |
| Total Available-for-Sale Securities |  |  |  | 134 |  |  | (69 | ) |  | 65 |  |
| Total |  |  |  | $ | 96 |  |  | $ | (53 | ) |  | $ | 43 |  |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2017 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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) |  | $ | 9 |  |  | $ | (4 | ) |  | $ | 5 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (44 | ) |  | 18 |  |  | (26 | ) |
| Total Pension and OPEB Plans |  |  |  | (35 | ) |  | 14 |  |  | (21 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | 125 |  |  | (65 | ) |  | 60 |  |
| Total Available-for-Sale Securities |  |  |  | 125 |  |  | (65 | ) |  | 60 |  |
| Total |  |  |  | $ | 90 |  |  | $ | (51 | ) |  | $ | 39 |  |
| PSEG |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2018 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (47 | ) |  | 14 |  |  | (33 | ) |
| Total Pension and OPEB Plans |  |  |  | (41 | ) |  | 12 |  |  | (29 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (13 | ) |  | 5 |  |  | (8 | ) |
| Total Available-for-Sale Securities |  |  |  | (13 | ) |  | 5 |  |  | (8 | ) |
| Total |  |  |  | $ | (54 | ) |  | $ | 17 |  |  | $ | (37 | ) |
| Power |  |  |  | Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Income Statement |
|  |  |  |  | Year Ended December 31, 2018 |
| Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Location of Pre-Tax Amount In Statement of Operations |  | 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 |  |  | $ | (1 | ) |  | $ | 4 |  |
| Amortization of Actuarial Loss |  | Non-Operating Pension and OPEB Credits (Costs) |  | (40 | ) |  | 11 |  |  | (29 | ) |
| Total Pension and OPEB Plans |  |  |  | (35 | ) |  | 10 |  |  | (25 | ) |
| Available-for-Sale Securities |  |  |  |  |  |  |  |  |
| Realized Gains (Losses) and OTTI |  | Net Gains (Losses) on Trust Investments |  | (11 | ) |  | 5 |  |  | (6 | ) |
| Total Available-for-Sale Securities |  |  |  | (11 | ) |  | 5 |  |  | (6 | ) |
| Total |  |  |  | $ | (46 | ) |  | $ | 15 |  |  | $ | (31 | ) |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
Name: | us-gaap_ComprehensiveIncomeNoteTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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