Capital Stock, Stock Awards, and Stock Options (Stock Awards Rollforward) (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Jan. 02, 2011
Stock Awards Rollforward [Abstract]
Beginning of year, unvested, Number of Shares	77,319	48,359	66,020
Awarded, Number of Shares	145,348	44,030	1,859
Vested, Number of Shares	(7,134)	(13,132)	(2,644)
Forfeited, Number of Shares	(7,616)	(1,938)	(16,876)
End of year, unvested, Number of Shares	207,917	77,319	48,359
Beginning of year, Average Grant-Date Fair Value	$ 424.45	$ 498.95	$ 494.97
Awarded, Average Grant-Date Fair Value	$ 321.56	$ 432.09	$ 442.29
Vested, Average Grant-Date Fair Value	$ 499.06	$ 722.67	$ 754.81
Forfeited, Average Grant-Date Fair Value	$ 417.79	$ 436.31	$ 437.06
End of year, Average Grant-Date Fair Value	$ 350.21	$ 424.45	$ 498.95