Defined Benefit Plans (Components Of Net Periodic Benefit Cost Of Other Post-Retirement Benefit Pension Pans) (Details) - Other postretirement benefit plans - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2016	Apr. 03, 2015
Defined Benefit Plan Disclosure
Service cost	$ 0.2	$ 0.3
Interest cost	1.4	2.0
Amortization of actuarial loss	0.1	0.7
Amortization of prior service credit	(0.8)	(0.8)
Net periodic benefit cost	$ 0.9	$ 2.2