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Right of Use Assets - Narrative (Details) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | $ 146 |  | $ 0
Lease liabilities |  | $ 52 |
Payments of lease liabilities, classified as financing activities | 25 |  |
Interest expense on lease liabilities | 4 |  |
Lease commitments for short-term leases for which recognition exemption has been used | 2 |  |
Expense relating to variable lease payments not included in measurement of lease liabilities | 6 |  |
IFRS 16 |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 146 | $ 85 | $ 52
IFRS 16 | Wind Farms |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Right-of-use assets | 31 |  |
Lease liabilities | $ 31 |  |

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- Definition The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 53 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_53_e&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of interest expense on lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 53 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_53_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of the lease commitments for short-term leases accounted for applying paragraph 6 of IFRS 16. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_47_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The cash outflow for payment of lease liabilities, classified as financing activities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2019-01-01 -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_e&doctype=Standard -URIDate 2018-03-16 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2018-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_53_j&doctype=Standard -URIDate 2018-03-16 + Details
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