Fair Value Measurements (Financial Assets And Liabilities Carried At Fair Value) (Details) - USD ($) $ in Millions	Oct. 02, 2015	Dec. 31, 2014
Assets:
Available-for-sale securities	$ 307.0	$ 257.5
Liabilities:
Deferred compensation plans	74.7	73.1
Quoted Prices in Active Market (Level 1)
Assets:
Available-for-sale securities	307.0	257.5
Liabilities:
Deferred compensation plans	0.0	0.0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	0.0	0.0
Liabilities:
Deferred compensation plans	74.7	73.1
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0.0	0.0
Liabilities:
Deferred compensation plans	$ 0.0	$ 0.0