Operating Segment And Geographic Information (Schedule Of Selected Operating Segment Financial Information) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 25, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011	Dec. 26, 2010	Sep. 26, 2010	Jun. 27, 2010	Mar. 28, 2010	Dec. 25, 2011		Dec. 26, 2010		Dec. 27, 2009
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue	$ 339.4	$ 403.2	$ 433.2	$ 413.0	$ 397.7	$ 414.4	$ 409.6	$ 378.0	$ 1,588.8		$ 1,599.7		$ 1,187.5
Operating income									164.9		184.6		(44.9)
Restructuring and impairments expense									(2.8)		(7.0)		(27.9)
Stock-based compensation expense									(24.8)		(20.9)		(17.5)
Selling, general and administrative expense									(218.4)		(220.8)		(179.3)
Charge for litigation											8.0		6.0
Expenses incurred as a result of change in retirement plan to a funded defined contribution plan									2.7
Other expenses									0.1
MCCC [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									642.3		657.6		525.7
Operating income									123.6		155.7		74.2
PCIA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									798.1		755.9		526.0
Operating income									206.9		201.5		69.5
SDT [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenue									148.4		186.2		135.8
Operating income									28.1		39.7		11.9
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and impairments expense									(2.8)		(7.0)		(27.9)
Stock-based compensation expense									(24.8)		(20.9)		(17.5)
Selling, general and administrative expense									(162.8)		(169.3)		(140.3)
Charge for litigation											(8.0)		(6.0)
Other									(3.3)	[1]	(7.1)	[1]	(8.8)	[1]
Korea And Japan [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Expenses incurred as a result of change in retirement plan to a funded defined contribution plan									2.7
Planned Closure Of Mountaintop Facility [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Accelerated depreciation related to Mountaintop facility									$ 0.7				$ 8.8

[1] In 2011, Other consists of $2.7 million associated with a change to defined contribution plans in Korea and Japan, $0.7 million in accelerated depreciation related to the previously planned closure of the Mountaintop facility, and $0.1 million of other expenses. In 2010, Other consists primarily of accelerated depreciation related to the previously planned closure of the Mountaintop facility and the eight inch conversion process at the Salt Lake facility. In 2009, Other includes $8.8 million in accelerated depreciation related to the previously planned closure of the Mountaintop facility.