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share-based compensation - TELUS Corporation share options (Details) - TELUS Corporation share options | 12 Months Ended
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Dec. 31, 2018 CAD ($) Y EquityInstruments | Dec. 31, 2017 CAD ($) EquityInstruments
share-based compensation |  |
Share options granted | 0 | 0
Number of share options outstanding, beginning of period | EquityInstruments | 740,471 | 1,417,693
Number of share options exercised | EquityInstruments | (402,528) | (652,926)
Number of share options forfeited | EquityInstruments | (2,046) | (3,908)
Number of share options expired | EquityInstruments | (9,733) | (20,388)
Number of share options outstanding, end of period | EquityInstruments | 326,164 | 740,471
Weighted average share price of options outstanding, beginning of period | $ 26.99 | $ 24.49
Weighted average share price of options exercised | 25.26 | 21.90
Weighted average share price of options forfeited | 29.19 | 27.56
Weighted average share price of options expired | 23.24 | 16.31
Weighted average share price of options outstanding, end of period | 29.22 | 26.99
Total intrinsic value of share option awards exercised | 8,000,000 | 15,000,000
Weighted average share price at the dates of exercise | $ 46.04 | $ 44.63
Weighted average remaining contractual life (years) | Y | 0.4 |
Maximum |  |
share-based compensation |  |
Exercise period | 7 years |
Option price | $ 31.69 |
Minimum |  |
share-based compensation |  |
Option price | $ 28.56 |

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