Segment Information (Schedule Of Selected Operating Segment Financial Information) (Details) (USD $) In Millions	3 Months Ended				9 Months Ended
	Sep. 25, 2011		Sep. 26, 2010		Sep. 25, 2011		Sep. 26, 2010
Total revenue	$ 403.2		$ 414.4		$ 1,249.4		$ 1,202.0
Operating income	43.8		48.3		150.6		133.8
Restructuring and impairments expense	(4.1)		(1.3)		(9.5)		(3.7)
Stock-based compensation expense					(19.0)		(15.9)
Selling, general and administrative expense	(54.4)		(57.3)		(167.8)		(165.6)
Charge for litigation			8.0				8.0
Other expense, net	1.4		3.8		5.8		8.8
Income before income taxes	42.4		44.5		144.8		125.0
MCCC [Member]
Total revenue	165.6		172.2		493.7		497.1
Operating income	33.2		43.5		99.3		116.7
PCIA [Member]
Total revenue	203.0		193.4		637.3		563.1
Operating income	56.5		53.4		181.6		148.2
SDT [Member]
Total revenue	34.6		48.8		118.4		141.8
Operating income	5.9		11.0		24.0		29.1
Corporate [Member]
Restructuring and impairments expense	(4.1)		(1.3)		(9.5)		(3.7)
Stock-based compensation expense	(6.0)		(4.7)		(19.0)		(16.4)
Selling, general and administrative expense	(41.4)		(43.7)		(124.8)		(126.9)
Charge for litigation			(8.0)				(8.0)
Other	$ (0.3)	[1]	$ (1.9)	[1]	$ (1.0)	[1]	$ (5.2)	[1]

[1] Other primarily consists of accelerated depreciation related to the planned closure of the Mountaintop facility.