Segmented Information - Narrative (Details) - CAD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Segment Reporting [Abstract] | |||||
| Number of reportable segments not disclosed | Fortis segments | ||||
| Related party transactions | $ 0 | $ 0 | $ 0 | $ 0 | |
| Inter-segment loans | $ 0 | $ 0 | $ 0 | ||