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Share-based compensation (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangements [Abstract]  
Schedule of changes in number and exercise prices of other equity instruments SARs and TSARs units outstanding at December 31, 2025 and 2024 are as follows:
SARsTSARs
Number of
units		Exercise
price USD		Number of
units		Exercise
price USD
Outstanding at December 31, 2023402,532 $      46.65 2,007,470 $ 45.10 
Granted
83,840 43.13255,540 42.58
Exercised
(30,557)37.10(185,957)33.49
Cancelled
(2,421)51.94(20,893)50.74
Expired
(87,120)50.15(236,062)50.17
Outstanding at December 31, 2024366,274 $          45.77 1,820,098 $45.21 
Granted
75,900 41.37280,580 40.65
Exercised
— — (7,440)29.27
Cancelled
(5,490)41.86 (4,920)49.41 
Expired
(87,800)54.65 (284,900)55.48 
Outstanding at December 31, 2025348,884 $42.64 1,803,418 $42.93 
Deferred, restricted and performance share units outstanding as at December 31, 2025 and 2024 are as follows:
Number of
deferred share
units
Number of
restricted share
units
Number of
performance share
units
Outstanding at December 31, 2023157,700 310,854 631,122 
Granted
28,159 134,080 234,430 
Performance factor impact on redemption1
— — 47,473 
Granted in lieu of dividends
2,827 5,468 10,113 
Redeemed
(33,892)(118,135)(297,331)
Cancelled
— (16,912)(24,305)
Outstanding at December 31, 2024154,794 315,355 601,502 
Granted
26,819 140,908 233,579 
Performance factor impact on redemption1
— — 79,240 
Granted in lieu of dividends
3,617 6,865 12,485 
Redeemed
— (104,837)(273,313)
Cancelled
— (17,683)(19,631)
Outstanding at December 31, 2025185,230 340,608 633,862 
1     The number of performance share units that ultimately vest are determined by performance factors as described below. The performance factors impact relates to performance share units redeemed in the quarter ended March 31, 2025 and the quarter ended March 31, 2024.
Schedule of number and weighted average remaining contractual life of SARs and TSARs outstanding and exercisable
Information regarding the SARs and TSARs outstanding as at December 31, 2025 is as follows:
Units outstanding at December 31, 2025Units exercisable at December 31, 2025
Range of exercise prices
Weighted average
remaining
contractual
life (years)
Number
of units
outstanding
Weighted
average
exercise
price
Number
of units
exercisable
Weighted
average
exercise
price
SARs


$29.27 to $38.79
1.5390,318$32.7390,318$32.73
$41.37 to $50.49
5.04232,30644.8188,42147.59
$57.60
0.1826,26057.6026,26057.60

3.77348,884$42.64204,999$42.32
TSARs
$29.27 to $38.79
1.80623,945$33.35598,765$33.35
$41.37 to $50.49
4.74916,96345.25440,77747.86
$57.60
0.18262,51057.60262,51057.60

3.061,803,418$42.931,302,052$43.15
Schedule of SARs and TSARs outstanding and exercisable by range of exercise prices
Information regarding the SARs and TSARs outstanding as at December 31, 2025 is as follows:
Units outstanding at December 31, 2025Units exercisable at December 31, 2025
Range of exercise prices
Weighted average
remaining
contractual
life (years)
Number
of units
outstanding
Weighted
average
exercise
price
Number
of units
exercisable
Weighted
average
exercise
price
SARs


$29.27 to $38.79
1.5390,318$32.7390,318$32.73
$41.37 to $50.49
5.04232,30644.8188,42147.59
$57.60
0.1826,26057.6026,26057.60

3.77348,884$42.64204,999$42.32
TSARs
$29.27 to $38.79
1.80623,945$33.35598,765$33.35
$41.37 to $50.49
4.74916,96345.25440,77747.86
$57.60
0.18262,51057.60262,51057.60

3.061,803,418$42.931,302,052$43.15
Schedule of weighted average assumptions of outstanding SARs and TSARs
The fair value of each outstanding SARs and TSARs grant was estimated on December 31, 2025 and 2024 using the Black-Scholes option pricing model with the following weighted average assumptions:
20252024
Risk-free interest rate
3.5%4.2%
Expected dividend yield
1.9%1.5%
Expected life of SARs and TSARs (years)
1.71.5
Expected volatility
39%35%
Expected forfeitures
0%0%
Weighted average fair value (USD per unit)
$7.69 $12.16