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SHARE CAPITAL (Details) - CAD CAD / shares in Units, CAD in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Shares |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance |  |  | 868,000,000 | 852,000,000
Balance at beginning of period, Amount |  |  | CAD 7,391 | CAD 6,669
Common shares issued, Number of Shares |  |  | 56,000,000 |
Common shares issued, Amount |  |  | CAD 2,241 |
Dividend Reinvestment and Share Purchase Plan, Number of Shares |  |  | 8,000,000 | 5,000,000
Dividend Reinvestment and Share Purchase Plan, Amount |  |  | CAD 395 | CAD 316
Shares issued on exercise of stock options, Number of Shares |  |  | 2,000,000 | 3,000,000
Shares issued on exercise of stock options, Amount |  |  | CAD 25 | CAD 54
Common Stock, Shares, Outstanding, Ending Balance | 934,000,000 | 860,000,000 | 934,000,000 | 860,000,000
Balance at end of period, Amount | CAD 10,052 | CAD 7,039 | CAD 10,052 | CAD 7,039
Gross proceeds | CAD 6 | CAD 32 | CAD 2,233 | CAD 40
EARNINGS PER COMMON SHARE |  |  |  |
Prorata weighted average interest in entity's own common shares | 13,000,000 | 12,000,000 | 13,000,000 | 12,000,000
Weighted average number of shares outstanding diluted |  |  |  |
Weighted average shares outstanding | 917,000,000 | 846,000,000 | 897,000,000 | 843,000,000
Effect of dilutive options (in shares) | 8,000,000 | 12,000,000 | 7,000,000 | 13,000,000
Diluted weighted average shares outstanding | 925,000,000 | 858,000,000 | 904,000,000 | 856,000,000
Stock options |  |  |  |
Weighted average number of shares outstanding diluted |  |  |  |
Antidilutive securities excluded from the diluted earnings per common share calculation (in shares) | 7,802,601 | 5,851,770 | 13,976,687 | 5,851,770
Weighted average exercise price of antidilutive securities (in Canadian dollars per share) | CAD 55.77 | CAD 59.14 | CAD 51.34 | CAD 59.14
Common shares |  |  |  |
Shares |  |  |  |
Common shares issued, Amount |  |  | CAD 2,241 |
Dividend Reinvestment and Share Purchase Plan, Amount |  |  | 395 | CAD 316
Shares issued on exercise of stock options, Amount |  |  | 25 | CAD 54
Gross proceeds |  |  | 2,300 |
Issuance costs |  |  | CAD 59 |

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