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Debt and Credit Facilities Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Commercial Paper |  | $ 1,450 |  | $ 1,063
Commitments of Single Institution as Percentage of Total Commitments |  | 9.00% |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 3,855 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 4,200 |  |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 345 |  |
Proceeds from Short-Term Loan |  | 1,250 | $ 800 |
Repayments of Short-term Debt |  | 300 | 0 |
Public Service Electric and Gas Company [Member] |  |  |  |
Commercial Paper |  | 0 |  | $ 100
Line of Credit Facility, Remaining Borrowing Capacity |  | 582 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 600 |  |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 18 |  |
PSEG Power [Member] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 1,975 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 2,100 |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 125 |  |
Five Year Credit Facility Maturing March 2023 [Member] | Public Service Electric and Gas Company [Member] |  |  |  |
Credit Facility Reduction in March 2022 |  | 4 |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 582 |  |
Debt Instrument, Maturity Date, Description |  | Mar 2024 |  |
Line of Credit Facility, Maximum Borrowing Capacity | [2] | $ 600 |  |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 18 |  |
Five Year Credit Facility Maturing March 2023 [Member] | PSEG Power [Member] |  |  |  |
Credit Facility Reduction in March 2022 |  | 12 |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 1,861 |  |
Debt Instrument, Maturity Date, Description |  | Mar 2024 |  |
Line of Credit Facility, Maximum Borrowing Capacity | [3] | $ 1,900 |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 39 |  |
Three Year Credit Facilities Maturing September 2021 [Member] | PSEG Power [Member] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 100 |  |
Debt Instrument, Maturity Date, Description |  | Sept 2021 |  |
Line of Credit Facility, Maximum Borrowing Capacity | [4] | $ 100 |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 0 |  |
Letter of Credit Facilities expiring September 2022 | PSEG Power [Member] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 14 |  |
Debt Instrument, Maturity Date, Description |  | Sept 2022 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 100 |  |
Line of Credit Facility, Fair Value of Amount Outstanding |  | 86 |  |
March 2020 Term Loan [Member] |  |  |  |
Proceeds from Short-Term Loan |  |  | $ 300 |
Repayments of Short-term Debt |  | 300 |  |
March 2021 Term Loan |  |  |  |
Proceeds from Short-Term Loan |  | 500 |  |
May 2021 Term Loan |  |  |  |
Proceeds from Short-Term Loan |  | 750 |  |
PSEG [Member] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 1,298 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 1,500 |  |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | 202 |  |
PSEG [Member] | Five Year Credit Facility Maturing March 2023 [Member] |  |  |  |
Credit Facility Reduction in March 2022 |  | 9 |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | $ 1,298 |  |
Debt Instrument, Maturity Date, Description |  | Mar 2024 |  |
Line of Credit Facility, Maximum Borrowing Capacity | [5] | $ 1,500 |  |
Line of Credit Facility, Fair Value of Amount Outstanding | [1] | $ 202 |  |
[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 June 30, 2021, PSEG had $200 million outstanding at a weighted average interest rate of 0.23%. PSE&G had no Commercial Paper outstanding as of June 30, 2021.
[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 Power letter of credit facility was terminated in July 2021.
[5] | PSEG facilities will be reduced by $9 million in March 2022.

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