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, unless otherwise specified	3 Months Ended
	Apr. 03, 2015	Mar. 28, 2014
Other post-retirement benefit plans
Defined Benefit Plan Disclosure
Service cost	$ 0.3	$ 0.3
Interest cost	2.0	2.1
Amortization of actuarial loss	0.7	0
Amortization of prior service credit	(0.8)	(1.0)
Net periodic benefit cost	$ 2.2	$ 1.4