Commitments and Contingencies - Legal Matters and Regulatory Issues (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| RIE Environmental Remediation | ||
| Claim By Former Affiliate [Abstract] | ||
| Accrual for Environmental Loss Contingencies, Gross | $ 96 | $ 98 |
| PPL Electric [Member] | PPL Electric Additional Sites [Member] | ||
| Claim By Former Affiliate [Abstract] | ||
| Accrual for Environmental Loss Contingencies, Gross | 8 | 8 |
| PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member] | ||
| Claim By Former Affiliate [Abstract] | ||
| Accrual for Environmental Loss Contingencies, Gross | $ 8 | $ 8 |