Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts) (Details) - 3 months ended Mar. 31, 2026	CAD ($) MWh MMBTU T	USD ($)
Natural gas (MMBtu)
Derivative [Line Items]
Commodity, energy measures \| MMBTU	2,631,297,631
Electricity (MWh)
Derivative [Line Items]
Commodity, energy measures	48,023,462
Foreign currency exchange ($ CAD)
Derivative [Line Items]
Commodity, monetary measure \| $	$ 83,060,811
FTR (MWh)
Derivative [Line Items]
Commodity, energy measures	31,491
Renewable Energy Certificates (MWh)
Derivative [Line Items]
Commodity, energy measures	13,528,697
Carbon emissions (Metric Tons)
Derivative [Line Items]
Commodity, mass measure \| T	817,859
Interest rate contracts ($ USD)
Derivative [Line Items]
Commodity, monetary measure \| $		$ 550,000,000