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Cash Flow Information Changes in Liabilities from Financing Activities (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Balance at beginning of the period | $ 3,741 | $ 4,415
Net cash flows | (626) | (631)
New leases | 10 | 14
Dividends declared | 107 | 64
Foreign exchange impact | 95 | (115)
Other | (2) | (6)
Balance at end of the period | 3,325 | 3,741
Long-term debt and finance lease obligations |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Balance at beginning of the period | 3,707 | 4,361
Net cash flows | (540) | (545)
New leases | 10 | 14
Dividends declared | 0 | 0
Foreign exchange impact | 95 | (115)
Other | (5) | (8)
Balance at end of the period | 3,267 | 3,707
Dividends payable (common and preferred) |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |
Balance at beginning of the period | 34 | 54
Net cash flows | (86) | (86)
New leases | 0 | 0
Dividends declared | 107 | 64
Foreign exchange impact | 0 | 0
Other | 3 | 2
Balance at end of the period | $ 58 | $ 34

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- Definition The increase (decrease) in liabilities arising from financing activities resulting from the effect of changes in foreign exchange rates. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 44B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_44B_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase in liabilities arising from financing activities resulting from new leases. [Refer: Liabilities arising from financing activities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Section A Statement of cash flows for an entity other than a financial institution -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=sect_AStatementofcashflowsforanentityotherthanafinancialinstitution&doctype=Illustrative%20Examples -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 44B -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_44B&doctype=Standard -URIDate 2017-03-09 + Details
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