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		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Defined Benefit Plan Disclosure
Service cost	$ 0.2	$ 0.3	$ 0.4	$ 0.6
Interest cost	1.4	2.0	2.8	4.0
Amortization of actuarial loss	0.1	0.7	0.2	1.4
Amortization of prior service credit	(0.8)	(0.8)	(1.6)	(1.6)
Net periodic benefit cost	$ 0.9	$ 2.2	$ 1.8	$ 4.4