Benefit Plans (Schedule Of Net Periodic Benefit Cost) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Pension Costs [Member]
Service cost	$ 0.2	$ 0.4	$ 0.5	$ 0.9
Interest cost	1.1	1.6	2.2	3.3
Expected return on plan assets	(1.0)	(1.1)	(2.0)	(2.6)
Amortization of prior service cost	0.1	0.1	0.2	0.2
Recognized actuarial loss	0	0	0	0.3
Net periodic benefit cost	0.4	1.0	0.9	2.1
Nonpension Postretirement Costs [Member]
Service cost	0.1	0.1	0.2	0.2
Interest cost	0.3	0.3	0.6	0.6
Amortization of prior service cost	0	0	0.1	0.1
Net periodic benefit cost	$ 0.4	$ 0.4	$ 0.9	$ 0.9