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Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Commercial Paper |  | $ 346 | $ 1,016
Commitments of Single Institution as Percentage of Total Commitments |  | 9.00% |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 3,649 |
Line of Credit Facility, Maximum Borrowing Capacity |  | 4,200 |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 551 |
Public Service Electric and Gas Company [Member] |  |  |
Commercial Paper |  | 10 | $ 272
Line of Credit Facility, Remaining Borrowing Capacity |  | 574 |
Line of Credit Facility, Maximum Borrowing Capacity |  | 600 |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 26 |
PSEG Power [Member] |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 1,924 |
Line of Credit Facility, Maximum Borrowing Capacity |  | 2,100 |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 176 |
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member] |  |  |
Credit Facility Reduction in March 2023 |  | 4 |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 574 |
Debt Instrument, Maturity Date, Description |  | Mar 2023 |
Line of Credit Facility, Maximum Borrowing Capacity | [2] | $ 600 |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 26 |
Five Year Credit Facility Maturing March 2023 [Member] | PSEG Power [Member] |  |  |
Credit Facility Reduction in March 2023 |  | 12 |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 1,860 |
Debt Instrument, Maturity Date, Description |  | Mar 2023 |
Line of Credit Facility, Maximum Borrowing Capacity | [3] | $ 1,900 |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 40 |
Three Year Credit Facilities Maturing September 2021 [Member] | PSEG Power [Member] |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 64 |
Debt Instrument, Maturity Date, Description |  | Sept 2021 |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 200 |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 136 |
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member] |  |  |
Commercial Paper |  | $ 10 |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |  | 2.17% |
PSEG [Member] |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 1,151 |
Line of Credit Facility, Maximum Borrowing Capacity |  | 1,500 |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 349 |
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member] |  |  |
Credit Facility Reduction in March 2023 |  | 9 |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 1,151 |
Debt Instrument, Maturity Date, Description |  | Mar 2023 |
Line of Credit Facility, Maximum Borrowing Capacity | [4] | $ 1,500 |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 349 |
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member] |  |  |
Commercial Paper |  | $ 336 |
Short-term Debt, Weighted Average Interest Rate, at Point in Time |  | 2.44% |
[1] | The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs, under which as of September 30, 2019, PSEG had $336 million outstanding at a weighted average interest rate of 2.44%. PSE&G had $10 million outstanding at a weighted average interest rate of 2.17% under its Commercial Paper Program as of September 30, 2019.
[2] | PSE&G facility will be reduced by $4 million in March 2022.
[3] | PSEG Power facilities will be reduced by $12 million in March 2022.
[4] | PSEG facilities will be reduced by $9 million in March 2022.

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