Shareholders' Equity (Deficit): Stock Options Activity (Details) - Employee Stock Option [Member] - USD ($)	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Number of Shares
Outstanding at the beginning of the period (in shares)	361,628	355,621	393,488
Granted (in shares)	21,320	62,540	72,600
Exercised (in shares)	(37,304)	(50,032)	(105,617)
Forfeited (in shares)	(3,752)	(6,501)	(4,850)
Outstanding at the end of the period (in shares)	341,892	361,628	355,621	393,488
Exercisable at the end of the period (in shares)	230,739
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 164.70	$ 146.03	$ 113.19
Granted (in dollars per share)	328.68	217.03	226.96
Exercised (in dollars per share)	107.49	94.97	78.78
Forfeited (in dollars per share)	204.26	183.28	158.48
Outstanding at the end of the period (in dollars per share)	180.73	$ 164.70	$ 146.03	$ 113.19
Exercisable at the end of the period (in dollars per share)	$ 153.64
Weighted Average Remaining Contractual Life (years)
Outstanding	5 years 11 months 23 days	6 years 4 months 24 days	6 years 3 months 25 days	5 years 7 months 9 days
Exercisable at the end of the period	4 years 10 months 13 days
Intrinsic Value
Outstanding at the beginning of the period	$ 26,688,200	$ 39,320,600	$ 27,864,900
Outstanding at the end of the period	81,017,600	$ 26,688,200	$ 39,320,600	$ 27,864,900
Exercisable at the end of the period	$ 60,894,300
Weighted average assumptions and results used in estimation of fair value of options granted
Risk free interest rate (as a percent)	3.88%	3.15%	1.13%
Expected life (years)	6 years	6 years	6 years
Expected volatility (as a percent)	28.10%	27.58%	25.51%
Dividend yield (as a percent)	2.94%	4.29%	3.13%
Option fair value (in dollars per share)	$ 79.88	$ 40.59	$ 37.90