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Regulatory Assets and Liabilities (Regulated Assets) (Details) - CAD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Regulatory Assets [Line Items]
Regulatory Assets, Current	$ 339	$ 602
Regulatory Assets, Long-term	2,766	3,018
Total regulatory assets	3,105	3,620
Deferred income tax regulatory assets
Regulatory Assets [Line Items]
Total regulatory assets	1,233	1,166
TEC capital cost recovery for early retired assets
Regulatory Assets [Line Items]
Total regulatory assets	671	674
NSPI FAM
Regulatory Assets [Line Items]
Total regulatory assets	395	307
Pension and post-retirement medical plan
Regulatory Assets [Line Items]
Total regulatory assets	364	369
Cost Recovery Clauses
Regulatory Assets [Line Items]
Total regulatory assets	151	707
Deferrals related to derivative instruments
Regulatory Assets [Line Items]
Total regulatory assets	88	30
Storm cost recovery clauses
Regulatory Assets [Line Items]
Total regulatory assets	52	138
Environmental Remediations
Regulatory Assets [Line Items]
Total regulatory assets	26	27
Stranded Cost Recovery
Regulatory Assets [Line Items]
Total regulatory assets	25	27
NMGC winter event gas cost recovery
Regulatory Assets [Line Items]
Total regulatory assets	0	69
Other
Regulatory Assets [Line Items]
Total regulatory assets	$ 100	$ 106

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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.

+ References

No definition available.

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

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-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.

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