MGP, Landfill and Disposal Sites (Details) $ in Millions |
Sep. 30, 2026
USD ($)
|
|---|---|
| Manufactured Gas Plant (MGP) Site [Abstract] | |
| Cost of identified MGP, landfill, or disposal sites under current investigation and/or remediation | $ 15 |
| Other MGP, Landfill, or Disposal Sites [Domain] | |
| Manufactured Gas Plant (MGP) Site [Abstract] | |
| Number of identified MGP, landfill, or disposal sites under current investigation and/or remediation | 15 |