Capital Stock, Stock Awards, and Stock Options (Stock Awards Rollforward) (Details 1)	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning of year, unvested, Number of Shares | shares	31,571
Awarded, Number of Shares | shares	1,221
Vested, Number of Shares | shares	(1,221)
Forfeited, Number of Shares | shares	(4,353)
End of year, unvested, Number of Shares | shares	27,218
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Beginning of year, Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 579.37
Awarded, Average Grant-Date Fair Value (in dollars per share) | $ / shares	605.49
Vested, Average Grant-Date Fair Value (in dollars per share) | $ / shares	605.49
Forfeited, Average Grant-Date Fair Value (in dollars per share) | $ / shares	576.45
End of year, Average Grant-Date Fair Value (in dollars per share) | $ / shares	$ 579.84