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Net Earnings Per Share (Narrative) (Details)
In Millions, unless otherwise specified
3 Months Ended
Apr. 03, 2015
Mar. 28, 2014
Earnings Per Share [Abstract]    
Antidilutive securities excluded from computation of earnings per share, options 1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount