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Credit Facilities, Long-Term Debt, and Finance Lease Obligations - Restrictions on Non-Recourse Debt and Security (Details) - CAD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Jul. 20, 2018	Dec. 31, 2017
Disclosure of detailed information about borrowings [line items]
Debentures issued	$ 350
Other borrowings	326	$ 0
Borrowings	3,212	3,267
Property, plant and equipment	6,207	6,164		$ 6,578
Bonds issued			$ 345
Non-recourse debt
Disclosure of detailed information about borrowings [line items]
Other borrowings	1,143	1,235
Restricted cash (Note 22)	42	33
Renewable generation facilities
Disclosure of detailed information about borrowings [line items]
Property, plant and equipment	$ 967	$ 1,021

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- Definition

The amount of bonds issued by the entity.

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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.

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No definition available.

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The amount of notes and debentures issued by the entity.

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The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

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