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SHARE-BASED PAYMENTS (Tables)
12 Months Ended
Mar. 31, 2022
Share-based Payment Arrangements [Abstract]  
Explanation of effect of share-based payments on entity's profit or loss
Share-based payments expense are as follows:
 20222021
Equity-settled plan
Stock option plan$7.8 $9.8 
Cash-settled plans
Stock purchase plan11.6 10.0 
Deferred share unit (DSU) plans1.1 11.4 
Restricted share unit (RSU) plans1.3 28.6 
Performance share unit (PSU) plan9.2 39.3 
Total share-based payments expense$31.0 $99.1 
Impact of equity swap agreements (Note 31)
9.2 (45.6)
Amount capitalized(0.5)(0.5)
Share-based payments expense, net of equity swap (Note 25)
$39.7 $53.0 
Carrying amount of share-based payments liabilities are as follows:

 20222021
Cash-settled plans
Deferred share unit (DSU) plans$20.6 $19.7 
Restricted share unit (RSU) plans42.4 46.3 
Performance share unit (PSU) plan26.8 36.8 
Total carrying amount of share-based payments liabilities$89.8 $102.8 
Current portion 19.8 23.1 
Non-current portion (Note 21)
$70.0 $79.7 
Disclosure of number and weighted average exercise prices of share options
Changes in outstanding stock options are as follows:
  2022   2021
  Weighted  Weighted
 Number ofaverage exerciseNumber ofaverage exercise
stock optionspricestock optionsprice
Stock options outstanding, beginning of year7,476,902 $23.39  6,050,854 $24.25 
Granted712,477 36.79  2,697,713 20.65 
Exercised(1,268,660)21.37  (687,165)17.94 
Forfeited(134,275)28.57  (579,700)26.28 
Expired(3,000)14.66  (4,800)11.02 
Stock options outstanding, end of year6,783,444 $25.08  7,476,902 $23.39 
Stock options exercisable, end of year3,395,732 $23.35  2,934,364 $21.66 
Disclosure of range of exercise prices of outstanding share options
As at March 31, 2022, summarized information about the stock options issued and outstanding is as follows:
 Options OutstandingOptions Exercisable
Weighted 
Number ofaverage remainingWeighted Number ofWeighted
Range ofstock optionscontractual lifeaverage exercisestock optionsaverage exercise
exercise pricesoutstanding (years)price  exercisableprice
$15.14 to $16.15
750,163 1.06$16.04 750,163 $16.04 
$20.24 to $27.14
4,338,416 3.9822.68 2,187,516 23.58 
$32.43 to $38.01
1,694,865 4.9835.22 458,053 34.20 
Total6,783,444 3.91$25.07 3,395,732 $23.35 
Disclosure of indirect measurement of fair value of goods or services received, other equity instruments granted during period
The assumptions used in the calculation of the fair value of the stock options on the grant date using the Black-Scholes option pricing model are as follows:
 2022 2021 
Common share price
$37.24 $21.48 
Exercise price
$36.79 $20.65 
Dividend yield
0.64 %2.01 %
Expected volatility
40.51 %35.22 %
Risk-free interest rate
0.76 %0.36 %
Expected stock option life
4 years4 years
Disclosure of number and weighted average exercise prices of other equity instruments
Changes in outstanding DSUs are as follows:
20222021
DSUs outstanding, beginning of year550,742 469,835 
Granted86,876 81,980 
Redeemed(3,276)(1,073)
DSUs vested and outstanding, end of year634,342 550,742 
Changes in outstanding RSUs are as follows:
20222021
RSUs outstanding, beginning of year1,430,524 1,490,603 
Granted289,745 246,249 
Cancelled(13,690)(42,264)
Redeemed(176,875)(264,064)
RSUs outstanding, end of year1,529,704 1,430,524 
RSUs vested, end of year1,303,042 1,295,233 
Changes in outstanding PSUs are as follows:
20222021
PSUs outstanding, beginning of year820,089 976,873 
Granted571,460 585,162 
Cancelled(23,135)(41,266)
Redeemed(521,243)(700,680)
PSUs outstanding, end of year847,171 820,089 
PSUs vested, end of year570,457 649,449