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FV Measurements (Change in Fair Value of Level 3 Financial Assets) (Details) - HFT derivatives - Energy Related derivative - Non-regulated operating revenues $ in Millions | 12 Months Ended
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Dec. 31, 2024 CAD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Beginning Balance | $ 34
Total realized and unrealized gains (losses) included in non-regulated operating revenues | (2)
Ending Balance | 32
Physical natural gas purchases |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Total realized and unrealized gains (losses) included in non-regulated operating revenues | (7)
Power |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Beginning Balance | 0
Total realized and unrealized gains (losses) included in non-regulated operating revenues | 5
Ending Balance | 5
Natural gas |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |
Beginning Balance | 34
Ending Balance | $ 27

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- Definition Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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