Related-Party Transactions - Schedule of Related Party Transactions, Payables (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Related Party Transaction [Line Items] | ||||||||||
| Accounts Payable | $ 1,204 | $ 1,489 | ||||||||
| Accounts Receivable, net of allowance | 2,067 | 1,888 | ||||||||
| Public Service Electric and Gas Company [Member] | ||||||||||
| Related Party Transaction [Line Items] | ||||||||||
| Working Capital Advances to Services | [1] | 33 | 33 | |||||||
| Public Service Electric and Gas Company [Member] | PSEG Power [Member] | ||||||||||
| Related Party Transaction [Line Items] | ||||||||||
| Accounts Payable | [2] | 166 | 228 | |||||||
| Public Service Electric and Gas Company [Member] | PSEG Parent | ||||||||||
| Related Party Transaction [Line Items] | ||||||||||
| Accounts Payable | [3] | 203 | 142 | |||||||
| Public Service Electric and Gas Company [Member] | PSEG Services | ||||||||||
| Related Party Transaction [Line Items] | ||||||||||
| Accounts Payable | [4] | 100 | 102 | |||||||
| Public Service Electric and Gas Company [Member] | Related Party | ||||||||||
| Related Party Transaction [Line Items] | ||||||||||
| Accounts Payable | 469 | 472 | ||||||||
| Long Term Accrued Taxes Payable | [3] | $ 7 | $ 7 | |||||||
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