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Income Tax Expense (Details)	3 Months Ended	9 Months Ended
Income Tax Expense (Details)	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Income Tax Expense
Effective income tax rate (as a percent)	27.00%		29.00%
Federal statutory income tax rate (as a percent)		35.00%
Benefit associated with early termination of certain leveraged leases (as a percent)	3.00%
Benefit associated with international operations in countries with lower tax rate (as a percent)	6.00%

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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