Defined Benefit Plans (Components Of Net Periodic Benefit Cost Of Other PostRetirement Benefit Pension Pans) (Details) - Other postretirement benefit plans - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Defined Benefit Plan Disclosure
Service cost	$ 0.2	$ 0.2
Interest cost	1.3	1.4
Amortization of actuarial loss	0.0	0.1
Amortization of prior service credit	(0.8)	(0.8)
Net periodic benefit cost	$ 0.7	$ 0.9