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Leases Reconciliation of Undiscounted Cash Flows (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Lessee, Lease, Description [Line Items] |  |
Total Minimum Lease Payments | $ 366 | $ 394
Reconciling Amount due to Discount Rate | (80) | (88)
Total Discounted Operating Lease Liabilities | 286 | 306
Public Service Electric and Gas Company |  |
Lessee, Lease, Description [Line Items] |  |
Total Minimum Lease Payments | 127 | 126
Reconciling Amount due to Discount Rate | (26) | (27)
Total Discounted Operating Lease Liabilities | 101 | 99
PSEG Power LLC |  |
Lessee, Lease, Description [Line Items] |  |
Total Minimum Lease Payments | 89 | 100
Reconciling Amount due to Discount Rate | (27) | (28)
Total Discounted Operating Lease Liabilities | 62 | 72
Other |  |
Lessee, Lease, Description [Line Items] |  |
Total Minimum Lease Payments | 150 | 168
Reconciling Amount due to Discount Rate | (27) | (33)
Total Discounted Operating Lease Liabilities | $ 123 | $ 135

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- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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- Definition Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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