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		9 Months Ended
	Oct. 02, 2015	Sep. 26, 2014	Oct. 02, 2015	Sep. 26, 2014
Defined Benefit Plan Disclosure
Service cost	$ 0.3	$ 0.2	$ 0.9	$ 0.8
Interest cost	1.8	2.6	5.8	6.8
Amortization of actuarial (gain) loss	(0.2)	(1.0)	1.2	(3.0)
Amortization of prior service credit	(0.8)	0.7	(2.4)	0.7
Net periodic benefit cost	$ 1.1	$ 2.5	$ 5.5	$ 5.3