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Income Taxes (Detail)	3 Months Ended		6 Months Ended
Income Taxes (Detail)	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Taxes [Line Items]
Effective Tax Rate	30.20%	31.30%	31.00%	31.40%

- Definition

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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