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Capital Disclosure of components of capital (Details) - CAD CAD in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Disclosure of components of capital [Line Items] |  |  |  |  |
Long-term debt |  | CAD 3,707 | CAD 4,361 |  |
Increase (decrease) in financial liabilities |  | (654) |  |  |
Equity |  | 4,385 | 4,663 | CAD 4,390 |
Contributed surplus |  | 10 | 9 |  |
Deficit |  | (1,209) | (933) |  |
Accumulated other comprehensive income |  | 489 | 399 |  |
Non-controlling interests |  | 1,059 | 1,152 |  |
Cash and cash equivalents |  | (314) | (305) | (54) | CAD (43)
Increase (decrease) in cash and cash equivalents |  | (9) | (251) | (11) |
Fair value asset of hedging instruments on long-term debt |  | (30) | (163) |  |
Increase (decrease) in hedging instruments, liabilities |  | 133 |  |  |
Total capital |  | 7,748 | 8,556 |  |
Increase (decrease) in capital |  | (808) |  |  |
Common shares |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity |  | 3,094 | 3,094 |  |
Increase (decrease) in equity |  | 0 |  |  |
Preferred shares |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity |  | 942 | 942 | 942 |
Increase (decrease) in equity |  | 0 |  |  |
Contributed surplus |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity |  | 10 | 9 | 9 |
Increase (decrease) in equity |  | 1 |  |  |
Deficit |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity |  | (1,209) | (933) | (1,018) |
Increase (decrease) in equity |  | (276) |  |  |
Accumulated other comprehensive income |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity | [1] | 489 | 399 | 353 |
Increase (decrease) in equity |  | 90 |  |  |
Non-controlling interests |  |  |  |  |
Disclosure of components of capital [Line Items] |  |  |  |  |
Equity |  | 1,059 | CAD 1,152 | CAD 1,029 |
Increase (decrease) in equity |  | CAD (93) |  |  |
[1] | (1) Refer to Note 25 for details on components of, and changes in, accumulated other comprehensive income (loss).

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B13_a&doctype=Appendix&seq=2 -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_i&doctype=Standard -URIDate 2017-03-09 + Details
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