v3.25.4
CONSOLIDATED STATEMENTS OF CASH FLOWS - Additional Information (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Supplemental Cash Flow Information [Abstract]
Capital contribution received from OPG
$ 3
$ 2
X
- Definition
Capital contributions received.
+ References
No definition available.
+ Details
Name:
ck0001114445_CapitalContributionsReceived
Namespace Prefix:
ck0001114445_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration