XML 158 R129.htm IDEA: XBRL DOCUMENT v3.20.4
Fair Value Measurements (Changes In Level 3 Assets And (Liabilities) Measured At Fair Value On A Recurring Basis) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Net Assets Measured At Fair Value On A Recurring Basis $ 3,100 $ 2,600
Net Assets Measured At Fair Value On A Recurring Basis Measured Using Unobservable Input And Classified As Level3 7 7
PSEG Power LLC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Included in Income 16 14
Unrealized Gains (Losses) 2 6
Net Derivative Assets (Liabilities) [Member] | PSEG Power LLC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Opening Balance 7 1
Included in Income [1] 16 14
Purchases, (Sales) 0 0
Issuances (Settlements) [2] (16) (8)
Transfers In (Out) [3] 0 0
Closing Balance 7 7
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements (14) (7)
Operating Revenues [Member] | PSEG Power LLC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Included in Income 26 23
Unrealized Gains (Losses) 1 12
Energy Costs [Member] | PSEG Power LLC    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Included in Income 1 (6)
Unrealized Gains (Losses) $ (10) $ (9)
[1] Unrealized gains (losses) in the following table represent the change in derivative assets and liabilities still held as of December 31, 2020 and 2019.
Years Ended December 31,
20202019
Total Gains (Losses)Unrealized Gains (Losses)Total Gains (Losses)Unrealized Gains (Losses)
Millions
PSEG and PSEG Power
Operating Revenues$26 $$23 $12 
Energy Costs(10)(9)(6)
Total$16 $$14 $
[2] Includes $(14) million and $(7) million in settlements for derivative contracts in 2020 and 2019.
[3] There were no transfers in 2020 and 2019 to or from Level 3.