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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - CAD ($) $ in Millions | Total | AOSP | Share capital | Retained earnings | Accumulated other comprehensive income (loss)
--- | --- | --- | --- | --- | ---
Balance – beginning of year at Dec. 31, 2014 |  |  |  | $ 4,432 | $ 24,408 | $ 51
Issued for the acquisition of AOSP and other assets | [1] |  |  | 0 |  |
Issued upon exercise of stock options |  |  |  | 91 |  |
Previously recognized liability on stock options exercised for common shares |  |  |  | 18 |  |
Return of capital on PrairieSky Royalty Ltd. share distribution |  |  |  | 0 |  |
Net earnings (loss) |  | $ (637) |  |  | (637) |
Dividends on common shares |  |  |  |  | (1,006) |
Other comprehensive income (loss), net of taxes |  | 24 |  |  |  | 24
Balance – end of year at Dec. 31, 2015 |  | 27,381 |  | 4,541 | 22,765 | 75
Issued for the acquisition of AOSP and other assets | [1] |  |  | 0 |  |
Issued upon exercise of stock options |  |  |  | 559 |  |
Previously recognized liability on stock options exercised for common shares |  |  |  | 117 |  |
Return of capital on PrairieSky Royalty Ltd. share distribution |  |  |  | (546) |  |
Net earnings (loss) |  | (204) |  |  | (204) |
Dividends on common shares |  |  |  |  | (1,035) |
Other comprehensive income (loss), net of taxes |  | (5) |  |  |  | (5)
Balance – end of year at Dec. 31, 2016 |  | 26,267 |  | 4,671 | 21,526 | 70
Issued for the acquisition of AOSP and other assets | [1] |  |  | 3,818 |  |
Issued upon exercise of stock options |  |  |  | 466 |  |
Previously recognized liability on stock options exercised for common shares |  |  |  | 154 |  |
Return of capital on PrairieSky Royalty Ltd. share distribution |  |  |  | 0 |  |
Net earnings (loss) |  | 2,397 |  |  | 2,397 |
Dividends on common shares |  |  |  |  | (1,311) |
Other comprehensive income (loss), net of taxes |  | (138) |  |  |  | (138)
Balance – end of year at Dec. 31, 2017 |  | $ 31,653 |  | $ 9,109 | $ 22,612 | $ (68)
Non-cash share considerations issued on the acquisition of AOSP and other assets |  |  | $ 3,818 |  |  |
[1] | During 2017, in connection with the acquisition of direct and indirect interests in the Athabasca Oil Sands Project ("AOSP") and other assets, the Company issued non-cash share consideration of $3,818 million. See note 7.

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