Financial Risk Management Activities (Schedule Of Gross Volume, On Absolute Basis For Derivative Contracts) (Detail)
$ / mwh in Millions, $ / DTH in Millions |
3 Months Ended |
|
Mar. 31, 2018
$ / mwh
$ / DTH
|
Mar. 31, 2017
$ / mwh
$ / DTH
|
| Natural Gas Dth [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis | $ / DTH |
237
|
154
|
| Electricity MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
(74)
|
(63)
|
| FTRs MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
5
|
6
|
| PSEG [Member] | Natural Gas Dth [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
0
|
0
|
| PSEG [Member] | Electricity MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
0
|
0
|
| PSEG [Member] | FTRs MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
0
|
0
|
| Power [Member] | Natural Gas Dth [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis | $ / DTH |
237
|
154
|
| Power [Member] | Electricity MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
(74)
|
(63)
|
| Power [Member] | FTRs MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
5
|
6
|
| PSE And G [Member] | Natural Gas Dth [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis | $ / DTH |
0
|
0
|
| PSE And G [Member] | Electricity MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
0
|
0
|
| PSE And G [Member] | FTRs MWh [Member] |
|
|
| Derivative [Line Items] |
|
|
| Gross Volume of Derivative on Absolute Value Basis |
0
|
0
|