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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 01, 2016
Mar. 27, 2015
Sep. 25, 2015
Income Tax Disclosure [Abstract]      
Unrecognized tax benefits, gross $ 60.9   $ 65.2
Unrecognized tax benefits if recognized, would affect our effective tax rate $ 50.2   $ 53.0
Effective tax rate (as a percent) 19.00% 27.00%