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Debt and Credit Facilities (Long-Term Debt Maturities) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |
Repayments in Next Twelve Months | $ 1,365 |
Repayments in Year Two | 1,684 |
Repayments in Year Three | 744 |
Repayments in Year Four | 1,775 |
Repayments in Year Five | 1,500 |
Thereafter | 8,140 |
Long-term Debt | 15,208 |
Public Service Electric and Gas Company |  |
Debt Instrument [Line Items] |  |
Repayments in Next Twelve Months | 259 |
Repayments in Year Two | 434 |
Repayments in Year Three | 0 |
Repayments in Year Four | 825 |
Repayments in Year Five | 750 |
Thereafter | 7,640 |
Long-term Debt | 9,908 | $ 9,258
PSEG Power LLC |  |
Debt Instrument [Line Items] |  |
Repayments in Next Twelve Months | 406 |
Repayments in Year Two | 950 |
Repayments in Year Three | 44 |
Repayments in Year Four | 950 |
Repayments in Year Five | 0 |
Thereafter | 500 |
Long-term Debt | 2,850 | 2,850
PSEG [Member] |  |
Debt Instrument [Line Items] |  |
Repayments in Next Twelve Months | 700 |
Repayments in Year Two | 300 |
Repayments in Year Three | 700 |
Repayments in Year Four | 0 |
Repayments in Year Five | 750 |
Thereafter | 0 |
Long-term Debt | $ 2,450 | $ 2,450

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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