Related-Party Transactions (Schedule Of Related Party Transactions, Payables) (Detail) - PSE And G [Member] - USD ($) $ in Millions |
Mar. 31, 2018 |
Dec. 31, 2017 |
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Related Party Transaction [Line Items] | |||||||||||
| Payable To Power | [1] | $ 215 | $ 221 | ||||||||
| Payable To Services | [2] | 65 | 78 | ||||||||
| Payable to PSEG | [3] | 105 | 41 | ||||||||
| Accounts Payable - Affiliated Companies | 385 | 340 | |||||||||
| Working Capital Advances to Services | [4] | 33 | 33 | ||||||||
| Long-Term Accrued Taxes Payable | $ 93 | $ 91 | |||||||||
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