ACQUISITIONS AND DISPOSITIONS - Schedule of Supplemental Pro Forma Consolidated Financial Information (Details) - CAD ($) $ in Millions |
3 Months Ended | 7 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Public Service Company of North Carolina, Incorporated | ||||
| Business Acquisition [Line Items] | ||||
| Operating revenues | $ 284 | $ 54,116 | $ 44,614 | |
| Earnings attributable to common shareholders | $ 50 | 5,149 | 5,944 | |
| Pro forma interest expense | 48 | |||
| Pro forma interest expense, net of tax | 37 | |||
| Questar Gas Company | ||||
| Business Acquisition [Line Items] | ||||
| Operating revenues | $ 755 | 54,698 | 45,918 | |
| Earnings attributable to common shareholders | $ 75 | 5,193 | 6,005 | |
| Pro forma interest expense | 70 | |||
| Pro forma interest expense, net of tax | 53 | |||
| The East Ohio Gas Company | ||||
| Business Acquisition [Line Items] | ||||
| Operating revenues | 53,788 | 45,058 | ||
| Earnings attributable to common shareholders | $ 5,130 | 5,961 | ||
| Pro forma interest expense | 100 | |||
| Pro forma interest expense, net of tax | $ 77 | |||