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Shareholders' Equity (Deficit): Stock Options Activity (Details) - Employee Stock Option
 9 Months Ended
Sep. 27, 2025
USD ($)
$ / shares
shares
Sep. 28, 2024
$ / shares
Number of Shares    
Outstanding at the beginning of the period (in shares) | shares 319,844  
Granted (in shares) | shares 24,232  
Exercised (in shares) | shares (29,750)  
Forfeited (in shares) | shares (1,165)  
Outstanding at the end of the period (in shares) | shares 313,161  
Exercisable at the end of the period (in shares) | shares 227,605  
Weighted Average Exercise Price    
Outstanding at the beginning of the period (in dollars per share) $ 203.89  
Granted (in dollars per share) 402.64  
Exercised (in dollars per share) 126.19  
Forfeited (in dollars per share) 301.01  
Outstanding at the end of the period (in dollars per share) 226.29  
Exercisable at the end of the period (in dollars per share) $ 186.92  
Weighted Average Remaining Contractual Life (years)    
Outstanding 5 years 7 months 13 days  
Exercisable at the end of the period 4 years 7 months 13 days  
Intrinsic Value    
Outstanding at the end of the period | $ $ 86,758,100  
Exercisable at the end of the period | $ $ 71,824,700  
Weighted average assumptions and results used in estimation of fair value of options granted    
Risk free interest rate (as a percent) 4.05% 4.57%
Expected life (years) 6 years 9 months 18 days 6 years
Expected volatility (as a percent) 29.31% 29.33%
Dividend yield (as a percent) 2.70% 2.93%
Option fair value (in dollars per share) $ 109.37 $ 93.88