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/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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Nominal energy measure used to calculate payments on a derivative instrument.

+ References

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Nominal mass used to calculate payments on a derivative instrument.

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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts Outstanding) (Details) - 3 months ended Mar. 31, 2025	CAD ($) MWh MMBTU T	USD ($)
Natural gas (MMBtu)
Derivative [Line Items]
Commodity, energy measures \| MMBTU	2,285,028,944
Electricity (MWh)
Derivative [Line Items]
Commodity, energy measures	45,449,172
Foreign currency exchange ($ CAD)
Derivative [Line Items]
Commodity, monetary measure \| $	$ 75,578,851
FTR (MWh)
Derivative [Line Items]
Commodity, energy measures	28,094
Renewable Energy Certificates (MWh)
Derivative [Line Items]
Commodity, energy measures	12,206,500
Carbon emissions (Metric Tons)
Derivative [Line Items]
Commodity, mass measure \| T	822,788
Interest rate contracts ($ USD)
Derivative [Line Items]
Commodity, monetary measure \| $		$ 400,000,000