v3.26.1
STOCK-BASED COMPENSATION PLANS (Tables)
12 Months Ended
Dec. 31, 2025
STOCK-BASED COMPENSATION PLANS  
Schedule of weighted-average assumptions used to estimate the fair value of outstanding stock options

December 31,

December 31,

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

Risk-free interest rate

2.93

%  

3.06

%  

Distribution yield

2.71

%  

4.14

%  

Expected volatility

20.65

%  

22.19

%  

Expected remaining life

4.0

years

3.7

years

Ultimate parent corporation stock option plan  
STOCK-BASED COMPENSATION PLANS  
Schedule of information on changes to outstanding options

2025

2024

Weighted

Weighted

average

average

  ​ ​ ​

Options

  ​ ​ ​

exercise price

  ​ ​ ​

Options

  ​ ​ ​

exercise price

Balance at beginning of year

 

3,728,227

$

31.14

 

2,741,560

$

31.43

Granted

1,465,000

43.58

1,060,000

29.82

Transferred

450,000

31.91

Exercised

(704,991)

31.52

(91,666)

30.44

Cancelled

(431,667)

30.67

Balance at end of year

4,488,236

$

35.14

3,728,227

$

31.14

Vested options at end of year

397,530

$

32.15

559,920

$

32.01