Defined Benefit Plans (Components Of Net Periodic Benefit Cost Of Other Post-Retirement Benefit Pension Pans) (Details) - Other post-retirement benefit plans - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2015	Jun. 27, 2014	Jul. 03, 2015	Jun. 27, 2014
Defined Benefit Plan Disclosure
Service cost	$ 0.3	$ 0.3	$ 0.6	$ 0.6
Interest cost	2.0	2.1	4.0	4.2
Amortization of actuarial loss	0.7	0.0	1.4	0.0
Amortization of prior service credit	(0.8)	(1.0)	(1.6)	(2.0)
Net periodic benefit cost	$ 2.2	$ 1.4	$ 4.4	$ 2.8