Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional information (Detail)

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Income Taxes - Additional information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Income Taxes [Line Items]    
Effective income tax rate 22.20% 20.10%
Net discrete tax Benefits $ 8.4 $ 13.5
Refund claims related to prior years 4.1  
Realization of unrecognized tax benefits 1.4 5.6
Tax reduction due to discrete items 2.20% 4.00%
Tax benefit related to retroactive extension of tax credits   8.3
Change in effective income tax rate without discrete items 0.30%  
Increase in unrecognized tax benefits and associated interest 2.5  
Net unrecognized tax benefits and interest, if recognized, would reduce the annual effective tax rate 112.1  
Reduction in income tax expenses 41.5  
Possible decrease in unrecognized income tax benefits and interest $ 48.6