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Income Taxes (Narrative) (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
Income Taxes (Narrative) (Detail)	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Open tax years by major tax jurisdiction					2010	2009	2008
Increase in efective tax rate	6.00%		2.00%
Current Statutory tax rate			24.50%
Effective tax rate	31.00%	28.80%	27.50%	29.70%
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Current Statutory tax rate			25.50%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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