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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions | Total | Preferred share investment | Common shares | Additional paid-in capital | Retained earnings/(deficit) | Accumulated other comprehensive income | Reciprocal shareholding | Total Enbridge Inc. shareholders' equity | Noncontrolling interests
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 |  | $ 7,255 | $ 10,492 | $ 3,399 | $ (716) | $ 1,058 | $ (102) |  | $ 577
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Common shares issued in Merger Transaction |  |  | 37,429 |  |  |  |  |  |
Dividend Reinvestment and Share Purchase Plan |  |  | 538 |  |  |  |  |  |
Options exercised |  |  | 45 | (53) |  |  |  |  |
Stock-based compensation |  |  |  | 51 |  |  |  |  |
Fair value of outstanding earned stock-based compensation from Merger Transaction |  |  |  | 77 |  |  |  |  |
Enbridge Energy Company, Inc. common control transaction |  |  |  | 118 |  |  |  |  | (331)
Dilution loss on Enbridge Energy Partners, L.P. issuance of Class A units |  |  |  | (870) |  |  |  |  | 870
Dilution gain on Spectra Energy Partners, LP restructuring (Note 10) |  |  |  | 0 |  |  |  |  |
Dilution gains/(losses) and other |  |  |  | 357 |  |  |  |  |
Earnings attributable to controlling interests | $ 1,721 |  |  |  | 1,721 |  |  |  |
Preference share dividends |  |  |  |  | (164) |  |  |  |
Common share dividends declared |  |  |  |  | (1,551) |  |  |  |
Dividends paid to reciprocal shareholder |  |  |  |  | 15 |  |  |  |
Redemption value adjustment attributable to redeemable noncontrolling interests |  |  |  |  | 189 |  |  |  |
Adjustment for the recognition of unutilized tax deductions for stock-based compensation expense |  |  |  |  | 41 |  |  |  |
Other comprehensive income/(loss) attributable to common shareholders, net of tax |  |  |  |  |  | (650) |  |  |
Earnings attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 371
Change in unrealized gain/(loss) on cash flow hedges |  |  |  |  |  |  |  |  | (19)
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | (112)
Reclassification to earnings of loss on cash flow hedges |  |  |  |  |  |  |  |  | 23
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax |  |  |  |  |  |  |  |  | (108)
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 263
Noncontrolling interests resulting from Merger Transaction |  |  |  |  |  |  |  |  | 8,792
Spectra Energy Partners, LP restructuring (Note 10) |  |  |  |  |  |  |  |  | 0
Distributions |  |  |  |  |  |  |  |  | (386)
Contributions |  |  |  |  |  |  |  |  | 453
Other |  |  |  |  |  |  |  |  | 13
Balance at Jun. 30, 2017 | $ 68,930 | 7,255 | 48,504 | 3,079 | (465) | 408 | (102) | $ 58,679 | 10,251
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Dividends paid per common share (in Canadian dollars per share) | $ 1.193 |  |  |  |  |  |  |  |
Modified retrospective adoption of accounting standard (Note 2) |  |  |  |  | 0 |  |  |  |
Balance at Dec. 31, 2017 | $ 65,732 | 7,747 | 50,737 | 3,194 | (2,468) | (973) | (102) |  | 7,597
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Common shares issued in Merger Transaction |  |  | 0 |  |  |  |  |  |
Dividend Reinvestment and Share Purchase Plan |  |  | 790 |  |  |  |  |  |
Options exercised |  |  | 21 | (10) |  |  |  |  |
Stock-based compensation |  |  |  | 34 |  |  |  |  |
Fair value of outstanding earned stock-based compensation from Merger Transaction |  |  |  | 0 |  |  |  |  |
Enbridge Energy Company, Inc. common control transaction |  |  |  | 0 |  |  |  |  | 0
Dilution loss on Enbridge Energy Partners, L.P. issuance of Class A units |  |  |  | 0 |  |  |  |  | 0
Dilution gain on Spectra Energy Partners, LP restructuring (Note 10) |  |  |  | 1,136 |  |  |  |  |
Dilution gains/(losses) and other |  |  |  | (43) |  |  |  |  |
Earnings attributable to controlling interests | 1,694 |  |  |  | 1,694 |  |  |  |
Preference share dividends |  |  |  |  | (178) |  |  |  |
Common share dividends declared |  |  |  |  | (1,145) |  |  |  |
Dividends paid to reciprocal shareholder |  |  |  |  | 17 |  |  |  |
Redemption value adjustment attributable to redeemable noncontrolling interests |  |  |  |  | (483) |  |  |  |
Adjustment for the recognition of unutilized tax deductions for stock-based compensation expense |  |  |  |  | 0 |  |  |  |
Other comprehensive income/(loss) attributable to common shareholders, net of tax |  |  |  |  |  | 2,250 |  |  |
Earnings attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 129
Change in unrealized gain/(loss) on cash flow hedges |  |  |  |  |  |  |  |  | 6
Foreign currency translation adjustments |  |  |  |  |  |  |  |  | 229
Reclassification to earnings of loss on cash flow hedges |  |  |  |  |  |  |  |  | 15
Other comprehensive income/(loss) attributable to noncontrolling interests, net of tax |  |  |  |  |  |  |  |  | 250
Comprehensive income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 379
Noncontrolling interests resulting from Merger Transaction |  |  |  |  |  |  |  |  | 0
Spectra Energy Partners, LP restructuring (Note 10) |  |  |  |  |  |  |  |  | (1,486)
Distributions |  |  |  |  |  |  |  |  | (425)
Contributions |  |  |  |  |  |  |  |  | 21
Other |  |  |  |  |  |  |  |  | 14
Balance at Jun. 30, 2018 | $ 68,232 | $ 7,747 | $ 51,548 | $ 4,311 | (2,649) | $ 1,277 | $ (102) | $ 62,132 | $ 6,100
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Dividends paid per common share (in Canadian dollars per share) | $ 1.342 |  |  |  |  |  |  |  |
Modified retrospective adoption of accounting standard (Note 2) |  |  |  |  | $ (86) |  |  |  |

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- Definition Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 + Details
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- Definition Value of stock issued as a result of the exercise of stock options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=84234705&loc=SL4590271-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4568740-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4568447-111683 + Details
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- Definition This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy. + References No definition available. + Details
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