Capital Stock, Stock Awards, and Stock Options (Details 1) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Jan. 02, 2011	Jan. 03, 2010
Stock Awards Rollforward [Abstract]
Beginning of year, unvested, Number of Shares	77,319	48,359	66,020	32,785
Awarded, Number of Shares		44,030	1,859	48,440
Vested, Number of Shares		(13,132)	(2,644)	(13,386)
Forfeited, Number of Shares		(1,938)	(16,876)	(1,819)
End of year, unvested, Number of Shares		77,319	48,359	66,020
Beginning of year, Average Award Price	$ 424.45	$ 498.95	$ 494.97	$ 796.52
Awarded, Average Award Price		$ 432.09	$ 442.29	$ 415.08
Vested, Average Award Price		$ 722.67	$ 754.81	$ 920.32
Forfeited, Average Award Price		$ 436.31	$ 437.06	$ 672.40
End of year, Average Award Price		$ 424.45	$ 498.95	$ 494.97
Stock Options Rollforward [Abstract]
Beginning of year, Number of Shares	129,044	87,919	90,569	87,025
Granted, Number of Shares	26,675	51,000	22,500	24,294
Expired or forfeited, Number of Shares		(9,875)	(25,150)	(20,750)
End of year, Number of Shares		129,044	87,919	90,569
Beginning of year, Average Option Price	$ 494.95	$ 495.05	$ 525.44	$ 581.17
Granted, Average Option Price		$ 499.45	$ 395.68	$ 421.95
Expired or forfeited, Average Option Price		$ 519.04	$ 515.59	$ 637.99
End of year, Average Option Price		$ 494.95	$ 495.05	$ 525.44

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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-Topic 718

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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-Publisher FASB

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-Number 123R

-Paragraph A240

-Subparagraph b(2)(a)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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- Definition

The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-SubTopic 10

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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