Utility Rate Regulation - Other (Details) - Unaffiliated Third Party Entity [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| PPL Electric [Member] | ||||
| Purchases Of Accounts Receivable [Line Items] | ||||
| Accounts Receivable, Purchase | $ 463 | $ 439 | $ 1,400 | $ 1,300 |
| Rhode Island Energy | ||||
| Purchases Of Accounts Receivable [Line Items] | ||||
| Accounts Receivable, Purchase | 98 | 90 | 267 | 245 |
| PPL Electric Utilities Corp [Member] | ||||
| Purchases Of Accounts Receivable [Line Items] | ||||
| Accounts Receivable, Purchase | $ 463 | $ 439 | $ 1,400 | $ 1,300 |