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Fair Value Measurements (Carrying Amounts And Fair Values Of Financial Instruments) (Details) - USD ($)
$ in Millions
Sep. 29, 2017
Dec. 31, 2016
Assets:    
Available-for-sale securities, carrying amount $ 190.7 $ 170.1
Available-for-sale securities, fair value 190.7 170.1
Liabilities:    
Notes payable and current portion of long-term debt 182.2 2,594.8
Long-term debt 10,726.8 9,674.2
Notes payable and current portion of long-term debt, fair value 182.2 2,594.8
Long-term debt, fair value $ 11,181.4 $ 10,095.1