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Debt and Credit Facilities Debt and Credit Facilities (Tables) | 6 Months Ended
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Jun. 30, 2021
Debt and Credit Facilities [Abstract] |
Schedule of Line of Credit Facilities [Table Text Block] | Each of the credit facilities is restricted as to availability and use to the specific companies as listed in the following table; however, if necessary, the PSEG facilities can also be used to support its subsidiaries’ liquidity needs. The total credit facilities and available liquidity as of June 30, 2021 were as follows:
|  |  | As of June 30, 2021 |  |  |  |  |
| Company/Facility |  | Total Facility |  | Usage (D) |  | Available Liquidity |  | Expiration Date |  | Primary Purpose |
|  |  | Millions |  |  |  |  |
| PSEG |  |  |  |  |  |  |  |  |  |  |
| 5-year Credit Facilities (A) |  | $ | 1,500 |  |  | $ | 202 |  |  | $ | 1,298 |  |  | Mar 2024 |  | Commercial Paper Support/Funding/Letters of Credit |
| Total PSEG |  | $ | 1,500 |  |  | $ | 202 |  |  | $ | 1,298 |  |  |  |  |  |
| PSE&G |  |  |  |  |  |  |  |  |  |  |
| 5-year Credit Facility (B) |  | $ | 600 |  |  | $ | 18 |  |  | $ | 582 |  |  | Mar 2024 |  | Commercial Paper Support/Funding/Letters of Credit |
| Total PSE&G |  | $ | 600 |  |  | $ | 18 |  |  | $ | 582 |  |  |  |  |  |
| PSEG Power |  |  |  |  |  |  |  |  |  |  |
| 3-year Letter of Credit Facility (E) |  | $ | 100 |  |  | $ | — |  |  | $ | 100 |  |  | Sept 2021 |  | Letters of Credit |
| 3-year Letter of Credit Facility |  | 100 |  |  | 86 |  |  | 14 |  |  | Sept 2022 |  | Letters of Credit |
| 5-year Credit Facilities (C) |  | 1,900 |  |  | 39 |  |  | 1,861 |  |  | Mar 2024 |  | Funding/Letters of Credit |
| Total PSEG Power |  | $ | 2,100 |  |  | $ | 125 |  |  | $ | 1,975 |  |  |  |  |  |
| Total |  | $ | 4,200 |  |  | $ | 345 |  |  | $ | 3,855 |  |  |  |  |  |
(A)PSEG facilities will be reduced by $9 million in March 2022. (B)PSE&G facility will be reduced by $4 million in March 2022. (C)PSEG Power facilities will be reduced by $12 million in March 2022. (D)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. (E)PSEG Power letter of credit facility was terminated in July 2021. Short-Term Loans PSEG In May and March 2021, PSEG entered into two 364-day variable rate term loan agreements for $750 million and $500 million, respectively. In March 2020, PSEG entered into a $300 million, 364-day variable rate term loan agreement which was prepaid in January 2021.

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- Definition Debt and Credit Facilities [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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