Recent Accounting Standards Recent Accounting Standards (Details) - USD ($)
$ in Millions |
3 Months Ended |
|
Mar. 31, 2018 |
Mar. 31, 2017 |
Jan. 01, 2018 |
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets |
|
|
$ 342
|
| Cumulative Effect of New Accounting Principle in Period of Adoption |
|
|
176
|
| PSE And G [Member] | Accounting Standard Update 2017-07 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification |
$ 14
|
|
|
| Prior Period Reclassification Adjustment |
|
$ (2)
|
|
| Power [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Cumulative Effect of New Accounting Principle in Period of Adoption |
|
|
$ 175
|
| Power [Member] | Accounting Standard Update 2017-07 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Prior Period Reclassification Adjustment |
|
2
|
|
| Operating Revenues [Member] | PSE And G [Member] | Accounting Standards Update 2014-09 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Prior Period Reclassification Adjustment |
|
(14)
|
|
| Operating Revenues [Member] | Power [Member] | Accounting Standards Update 2014-09 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Prior Period Reclassification Adjustment |
|
(15)
|
|
| Energy Costs [Member] | PSE And G [Member] | Accounting Standards Update 2014-09 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Prior Period Reclassification Adjustment |
|
(9)
|
|
| Operation and Maintenance Expense [Member] | PSE And G [Member] | Accounting Standards Update 2014-09 [Member] |
|
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
|
|
|
| Prior Period Reclassification Adjustment |
|
$ (5)
|
|