Fair Value Measurements (Financial Assets And Liabilities Carried At Fair Value) (Details) (USD $) In Millions, unless otherwise specified	Apr. 03, 2015	Dec. 31, 2014
Assets:
Available-for-sale securities	$ 342.3	$ 257.5
Liabilities:
Deferred compensation plans	75.3	75.0
Quoted Prices in Active Market (Level 1)
Assets:
Available-for-sale securities	342.3	257.5
Liabilities:
Deferred compensation plans	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	0	0
Liabilities:
Deferred compensation plans	75.3	75.0
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0	0
Liabilities:
Deferred compensation plans	$ 0	$ 0