| Cover Page | Dec. 08, 2020 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 8, 2020 |
| Entity File Number | 001-09120 |
| Entity Registrant Name | Public Service Enterprise Group Incorporated |
| Entity Incorporation, State or Country Code | NJ |
| Entity Tax Identification Number | 22-2625848 |
| Entity Address, Address Line One | 80 Park Plaza |
| Entity Address, City or Town | Newark |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07102 |
| City Area Code | 973 |
| Local Phone Number | 430-7000 |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000788784 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| PSEG Power [Member] | |
| Entity Information [Line Items] | |
| Entity File Number | 001-34232 |
| Entity Registrant Name | PSEG Power LLC |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 22-3663480 |
| Entity Address, Address Line One | 80 Park Plaza |
| Entity Address, City or Town | Newark |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 07102 |
| City Area Code | 973 |
| Local Phone Number | 430-7000 |
| Amendment Flag | false |
| Entity Central Index Key | 0001158659 |
| Common Stock without par value [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Common Stock without par value |
| Trading Symbol | PEG |
| Security Exchange Name | NYSE |
| Senior Notes Eight Point Six Two Five Percent due Two Thousand Thirty One [Member] | PSEG Power [Member] | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | 8.625% Senior Notes, due 2031 |
| Trading Symbol | PEG31 |
| Security Exchange Name | NYSE |
