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Commitments And Contingencies (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Oct. 02, 2018
Dec. 31, 2017
Sep. 30, 2018
Nov. 01, 2018
Apr. 01, 2018
East China JV [Member]          
Other Commitments [Line Items]          
Preexisting ownership percentage         50.00%
Payments to Acquire Interest in Joint Venture   $ 1,440.8      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value   $ 1,440.8 $ 1,400.0    
Taiwan JV [Member]          
Other Commitments [Line Items]          
Preexisting ownership percentage         50.00%
Subsequent Event [Member]          
Other Commitments [Line Items]          
Accelerated Share Repurchases, Settlement (Payment) or Receipt $ 5,000.0        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased       120  
Accelerated Share Repurchase, Date Entered Oct. 02, 2018        
Accelerated Share Repurchases, Cash or Stock Settlement approximates 80 percent of the total number of shares to be repurchased under the ASR agreements.        
Repurchase Agreements [Member]          
Other Commitments [Line Items]          
Other Commitment     $ 5,000.0