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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD CAD in Millions | Total Enbridge Inc. shareholders' equity | Preference shares | Common shares | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income (Note 11) | Reciprocal shareholding | Noncontrolling interests | Comprehensive income/(loss) | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 |  | CAD 6,515 | CAD 6,669 | CAD 2,549 | CAD 1,571 | CAD (435) | CAD (83) | CAD 2,015 |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Dividend reinvestment and share purchase plan |  |  | 316 |  |  |  |  |  |  | CAD 316
Stock-based compensation |  |  |  | 23 |  |  |  |  |  |
Options exercised |  |  | 54 | (14) |  |  |  |  |  | 54
Dilution gains and other |  |  |  | 34 |  |  |  |  |  |
Earnings attributable to Enbridge Inc. |  |  |  |  | 336 |  |  |  |  | CAD 336
Preference share dividends |  |  |  |  | (142) |  |  |  |  |
Common share dividends declared |  |  |  |  | (795) |  |  |  |  |
Dividends paid to reciprocal shareholder |  |  |  |  | 11 |  |  |  |  |
Redemption value adjustment attributable to redeemable noncontrolling interests |  |  |  |  | 312 |  |  |  |  |
Other comprehensive income/(loss) attributable to Enbridge Inc. common shareholders |  |  |  |  |  | 648 |  |  |  |
Earnings/(loss) attributable to noncontrolling interests |  |  |  |  |  |  |  | (149) | CAD (149) |
Change in unrealized loss on cash flow hedges |  |  |  |  |  |  |  | (16) | (16) |
Change in foreign currency translation adjustment |  |  |  |  |  |  |  | 123 | 123 |
Reclassification to earnings of realized cash flow hedges |  |  |  |  |  |  |  | (9) | (9) |
Reclassification to earnings of unrealized cash flow hedges |  |  |  |  |  |  |  | (26) | (26) |
Other comprehensive income/(loss) attributable to noncontrolling interests |  |  |  |  |  |  |  | 72 | 72 |
Comprehensive loss attributable to noncontrolling interests |  |  |  |  |  |  |  | (77) | (77) |
Distributions |  |  |  |  |  |  |  | (324) |  |
Contributions |  |  |  |  |  |  |  | 579 |  |
Drop down of interest to Enbridge Energy Partners, L.P. |  |  |  | 218 |  |  |  | (304) |  |
Dilution loss |  |  |  |  |  |  |  | (53) |  |
Other |  |  |  |  |  |  |  | (5) |  |
Dividends paid per common share (in Canadian dollars per share) |  |  |  |  |  |  |  |  |  | CAD 0.93
Balance at Jun. 30, 2015 | CAD 17,787 | 6,515 | 7,039 | 2,810 | 1,293 | 213 | (83) | 1,831 |  | CAD 19,618
Balance at Dec. 31, 2015 |  |  | 7,391 | 3,301 | 142 | 1,632 | (83) | 1,300 |  | 20,198
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |  |
Common shares issued |  |  | 2,241 |  |  |  |  |  |  | 2,241
Dividend reinvestment and share purchase plan |  |  | 395 |  |  |  |  |  |  | 395
Stock-based compensation |  |  |  | 30 |  |  |  |  |  |
Options exercised |  |  | 25 | (12) |  |  |  |  |  | 25
Issuance of treasury stock |  |  |  |  |  |  | (19) |  |  |
Dilution gains and other |  |  |  | 98 |  |  |  |  |  |
Earnings attributable to Enbridge Inc. |  |  |  |  | 1,658 |  |  |  |  | CAD 1,658
Preference share dividends |  |  |  |  | (144) |  |  |  |  |
Common share dividends declared |  |  |  |  | (952) |  |  |  |  |
Dividends paid to reciprocal shareholder |  |  |  |  | 13 |  |  |  |  |
Redemption value adjustment attributable to redeemable noncontrolling interests |  |  |  |  | (604) |  |  |  |  |
Adjustment relating to equity method investment |  |  |  |  | (30) |  |  |  |  |
Other comprehensive income/(loss) attributable to Enbridge Inc. common shareholders |  |  |  |  |  | (1,378) |  |  |  |
Earnings/(loss) attributable to noncontrolling interests |  |  |  |  |  |  |  | 22 | 22 |
Change in unrealized loss on cash flow hedges |  |  |  |  |  |  |  | (146) | (146) |
Change in foreign currency translation adjustment |  |  |  |  |  |  |  | (55) | (55) |
Reclassification to earnings of realized cash flow hedges |  |  |  |  |  |  |  | 13 | 13 |
Reclassification to earnings of unrealized cash flow hedges |  |  |  |  |  |  |  | 3 | 3 |
Other comprehensive income/(loss) attributable to noncontrolling interests |  |  |  |  |  |  |  | (185) | (185) |
Comprehensive loss attributable to noncontrolling interests |  |  |  |  |  |  |  | (163) | CAD (163) |
Distributions |  |  |  |  |  |  |  | (362) |  |
Contributions |  |  |  |  |  |  |  | 28 |  |
Other |  |  |  |  |  |  |  | (6) |  |
Dividends paid per common share (in Canadian dollars per share) |  |  |  |  |  |  |  |  |  | CAD 1.06
Balance at Jun. 30, 2016 | CAD 20,219 | CAD 6,515 | CAD 10,052 | CAD 3,417 | CAD 83 | CAD 254 | CAD (102) | CAD 797 |  | CAD 21,016

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