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Fair Value Measurements Fair Value Measurements (Narrative) (Details) - USD ($)
 6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Jan. 01, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Foreign currency cash flow hedge gain (loss) to be reclassified $ 1,900,000    
Long-lived asset impairment loss 0 $ 0  
Goodwill impairment loss 0 0  
Indefinite-lived intangible assets (excluding goodwill) impairment loss 0 0  
Cost-method investment impairment loss 0 0  
Equity method investments, carrying value 24,700,000   $ 20,600,000
Fair Value, Inputs, Level 2 [Member]      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Gain on cost method and equity method investments $ 1,200,000 $ 500,000  
Chinese Venture Capital Fund [Member]      
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]      
Equity method investment ownership (percent) 6.90%