v3.26.1
STOCK-BASED COMPENSATION PLANS - Ultimate parent corporation stock option plan (Details) - Ultimate parent corporation stock option plan
12 Months Ended
Dec. 31, 2025
shares
STOCK-BASED COMPENSATION PLANS  
Exercisable period 10 years
Class B  
STOCK-BASED COMPENSATION PLANS  
Number of shares authorized to issue under stock-based compensation plans 26,000,000
Vesting period 3 years  
STOCK-BASED COMPENSATION PLANS  
Percentage of stock options vested 33.33%
Vesting period 4 years  
STOCK-BASED COMPENSATION PLANS  
Percentage of stock options vested 66.67%
Vesting period 5 years  
STOCK-BASED COMPENSATION PLANS  
Percentage of stock options vested 100.00%
Options would vest equally over three years  
STOCK-BASED COMPENSATION PLANS  
Vesting period of share based awards (in years) 3 years
Annual vesting percent of share based awards 33.33%