Financial Information By Business Segment - Financial Information By Business Segment (Parenthetical) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Operating Segments [Member] | PSEG Power & Other [Member] | ||
| Segment Reporting Information [Line Items] | ||
| Non trading commodity mark to market gains (losses), net of tax | $ (30) | $ (135) |