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STOCK OPTION AND STOCK UNIT PLANS | 12 Months Ended
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Dec. 31, 2015
STOCK OPTION AND STOCK UNIT PLANS |
STOCK OPTION AND STOCK UNIT PLANS | 22.STOCK OPTION AND STOCK UNIT PLANS The Company maintains four long-term incentive compensation plans: the ISO Plan, the PSO Plan, the PSU Plan and the RSU Plan. A maximum of 60 million common shares were reserved for issuance under the 2002 ISO plan, of which 50 million have been issued to date. A further 71 million common shares have been reserved for issuance for the 2007 ISO and PSO plans, of which 11 million have been exercised and issued from treasury to date. The PSU and RSU plans grant notional units as if a unit was one Enbridge common share and are payable in cash. INCENTIVE STOCK OPTIONS Key employees are granted ISO to purchase common shares at the market price on the grant date. ISO vest in equal annual instalments over a four-year period and expire 10 years after the issue date.
December 31, 2015 |  | Number |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value
(options in thousands; intrinsic value in millions of Canadian dollars) |  |  |  |  |  |  |  |
Options outstanding at beginning of year |  | 31,330 |  | 34.97 |  |  |  |
Options granted |  | 5,852 |  | 59.14 |  |  |  |
Options exercised 1 |  | (4,224) |  | 26.61 |  |  |  |
Options cancelled or expired |  | (170) |  | 44.87 |  |  |  |
Options outstanding at end of year |  | 32,788 |  | 40.31 |  | 6.3 |  | 525
Options vested at end of year 2 |  | 18,297 |  | 31.66 |  | 4.8 |  | 451
| 1 |  | The total intrinsic value of ISO exercised during the year ended December 31, 2015 was $126 million (2014 - $117 million) and cash received on exercise was $43 million (2014 - $37 million).
| 2 |  | The total fair value of options vested under the ISO Plan during the year ended December 31, 2015 was $34 million (2014 - $26 million).
Weighted average assumptions used to determine the fair value of ISO granted using the Black-Scholes-Merton option pricing model are as follows:
Year ended December 31, |  | 2015 |  | 2014
Fair value per option (Canadian dollars)1 |  | 6.48 |  | 5.53
Valuation assumptions |  |  |  |
Expected option term (years)2 |  | 5 |  | 5
Expected volatility 3 |  | 19.9% |  | 16.9%
Expected dividend yield 4 |  | 3.2% |  | 2.9%
Risk-free interest rate 5 |  | 0.9% |  | 1.6%
| 1 |  | Options granted to United States employees are based on New York Stock Exchange prices. The option value and assumptions shown are based on a weighted average of the United States and the Canadian options. The fair values per option were $6.22 (2014 - $5.45) for Canadian employees and US$6.16 (2014 - US$5.35) for United States employees.
| 2 |  | The expected option term is six years based on historical exercise practice and three years for retirement eligible employees.
| 3 |  | Expected volatility is determined with reference to historic daily share price volatility and consideration of the implied volatility observable in call option values near the grant date.
| 4 |  | The expected dividend yield is the current annual dividend at the grant date divided by the current stock price.
| 5 |  | The risk-free interest rate is based on the Government of Canada’s Canadian Bond Yields and the United States Treasury Bond Yields.
Compensation expense recorded for the year ended December 31, 2015 for ISO was $35 million (2014 - $29 million). At December 31, 2015, unrecognized compensation cost related to non-vested stock-based compensation arrangements granted under the ISO Plan was $47 million. The cost is expected to be fully recognized over a weighted average period of approximately two years. PERFORMANCE STOCK OPTIONS PSO are granted to executive officers and become exercisable when both performance targets and time vesting requirements have been met. PSO were granted on August 15, 2007, February 19, 2008, August 15, 2012 and March 13, 2014 under the 2007 plan. All performance targets for the 2007 and 2008 grants have been met. The time vesting requirements were fulfilled evenly over a five-year period ending on August 15, 2012 with the options being exercisable until August 15, 2015. Time vesting requirements for the 2012 grant will be fulfilled evenly over a five-year term, ending August 15, 2017. The 2012 grant’s performance targets are based on the Company’s share price and must be met by February 15, 2019 or the options expire. As at December 31, 2015, all performance targets have been met and the options are exercisable until August 15, 2020. Time vesting requirements for the 2014 grant will be fulfilled evenly over a four-year term, ending March 13, 2018. The 2014 grant’s performance targets are based on the Company’s share price and must be met by February 15, 2019 or the options expire. As at December 31, 2015, all performance targets have been met and the options are exercisable until August 15, 2020.
December 31, 2015 |  | Number |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value
(options in thousands; intrinsic value in millions of Canadian dollars) |  |  |  |  |  |  |  |
Options outstanding at beginning of year |  | 4,511 |  | 35.97 |  |  |  |
Options granted |  | - |  | - |  |  |  |
Options exercised 1 |  | (830) |  | 19.44 |  |  |  |
Options cancelled or expired |  | (464) |  | 39.34 |  |  |  |
Options outstanding at end of year |  | 3,217 |  | 39.75 |  | 3.9 |  | 53
Options vested at end of year 2 |  | 2,307 |  | 39.48 |  | 3.7 |  | 39
| 1 |  | The total intrinsic value of PSO exercised during the year ended December 31, 2015 was $43 million (2014 - nil) and cash received on exercise was $13 million (2014 - nil).
| 2 |  | The total fair value of options vested under the PSO Plan during the year ended December 31, 2015 was $6 million (2014 - $5 million).
Assumptions used to determine the fair value of PSO granted using the Bloomberg barrier option valuation model are as follows:
Year ended December 31, |  |  |  | 2014
Fair value per option (Canadian dollars) |  |  |  | 5.77
Valuation assumptions |  |  |  |
Expected option term (years)1 |  |  |  | 6.5
Expected volatility 2 |  |  |  | 15.0%
Expected dividend yield 3 |  |  |  | 2.8%
Risk-free interest rate 4 |  |  |  | 1.7%
| 1 |  | The expected option term is based on historical exercise practice.
| 2 |  | Expected volatility is determined with reference to historic daily share price volatility.
| 3 |  | The expected dividend yield is the current annual dividend at the grant date divided by the current stock price.
| 4 |  | The risk-free interest rate is based on the Government of Canada’s Canadian Bond Yields.
Compensation expense recorded for the year ended December 31, 2015 for PSO was $3 million (2014 - $3 million). At December 31, 2015, unrecognized compensation cost related to non-vested stock-based compensation arrangements granted under the PSO Plan was $5 million. The cost is expected to be fully recognized over a weighted average period of approximately two years. PERFORMANCE STOCK UNITS The Company has a PSU Plan for executives where cash awards are paid following a three-year performance cycle. Awards are calculated by multiplying the number of units outstanding at the end of the performance period by the Company’s weighted average share price for 20 days prior to the maturity of the grant and by a performance multiplier. The performance multiplier ranges from zero, if the Company’s performance fails to meet threshold performance levels, to a maximum of two if the Company performs within the highest range of its performance targets. The performance multiplier is derived through a calculation of the Company’s price/earnings ratio relative to a specified peer group of companies and the Company’s earnings per share, adjusted for unusual, non-operating or non-recurring items, relative to targets established at the time of grant. To calculate the 2015 expense, multipliers of two, were used for each of the 2013, 2014 and 2015 PSU grants.
December 31, 2015 |  | Number |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value
(units in thousands; intrinsic value in millions of Canadian dollars) |  |  |  |  |  |
Units outstanding at beginning of year |  | 555 |  |  |  |
Units granted |  | 244 |  |  |  |
Units cancelled |  | (9) |  |  |  |
Units matured 1 |  | (282) |  |  |  |
Dividend reinvestment |  | 28 |  |  |  |
Units outstanding at end of year |  | 536 |  | 1.5 |  | 47
| 1 |  | The total amount paid during the year ended December 31, 2015 for PSU was $35 million (2014 - $36 million).
Compensation expense recorded for the year ended December 31, 2015 for PSU was $12 million (2014 - $40 million). As at December 31, 2015, unrecognized compensation expense related to non-vested units granted under the PSU Plan was $28 million and is expected to be fully recognized over a weighted average period of approximately two years. RESTRICTED STOCK UNITS Enbridge has a RSU Plan where cash awards are paid to certain non-executive employees of the Company following a 35-month maturity period. RSU holders receive cash equal to the Company’s weighted average share price for 20 days prior to the maturity of the grant multiplied by the units outstanding on the maturity date.
December 31, 2015 |  | Number |  | Weighted Average Remaining Contractual Life (years) |  | Aggregate Intrinsic Value
(units in thousands; intrinsic value in millions of Canadian dollars) |  |  |  |  |  |
Units outstanding at beginning of year |  | 1,959 |  |  |  |
Units granted |  | 854 |  |  |  |
Units cancelled |  | (101) |  |  |  |
Units matured 1 |  | (904) |  |  |  |
Dividend reinvestment |  | 98 |  |  |  |
Units outstanding at end of year |  | 1,906 |  | 1.4 |  | 88
| 1 |  | The total amount paid during the year ended December 31, 2015 for RSU was $45 million (2014 - $45 million).
Compensation expense recorded for the year ended December 31, 2015 for RSU was $47 million (2014 - $44 million). As at December 31, 2015, unrecognized compensation expense related to non-vested units granted under the RSU Plan was $64 million and is expected to be fully recognized over a weighted average period of approximately one year.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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