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Change in Accounting Policy (Narrative) (Details) - CAD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity	$ 11,441	$ 10,150	$ 9,238
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity	$ 1,584	$ 1,348	$ 1,495

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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