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Changes in Accounting Policies - Narrative (Details) - CAD ($) $ in Millions	Jan. 01, 2019	Jan. 01, 2018
IFRS 15 | Restatement Adjustment
Disclosure of voluntary change in accounting policy [line items]
Reduction to retained earnings		$ 44
Subsequent Event | Scenario, Forecast | IFRS 16
Disclosure of voluntary change in accounting policy [line items]
Right-of-use assets	$ 800
Lease liabilities	$ 900

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- Definition

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

+ References

No definition available.

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- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

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- Definition

A component of equity representing the entity's cumulative undistributed earnings or deficit.

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- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

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