Asset Impairment, Restructuring and Other Charges (Recoveries) (Details) (USD $)	3 Months Ended							12 Months Ended
	Mar. 27, 2011	Dec. 26, 2010	Sep. 26, 2010	Jun. 27, 2010	Mar. 28, 2010	Dec. 27, 2009	Sep. 27, 2009	Jun. 26, 2011	Jun. 27, 2010	Jun. 28, 2009
Reported in asset impairment, restructuring and other charges (recoveries):
Asset impairment								$ 0		$ 48,885,000
Severance and workforce reduction costs (recoveries)								(3,426,000)	194,000	6,648,000
Other charges								67,000	95,000	960,000
Total asset impairment, restructuring and other charges (recoveries)	(3,489,000)	(4,000)	134,000	35,000	117,000	(30,000)	167,000	(3,359,000)	289,000	56,493,000
Reported in cost of sales [Abstract]
Workforce reduction expense related to retention bonuses								(1,000,000)	1,000,000	700,000
Costs incurred to relocate and install equipment								200,000	2,100,000	3,700,000
Other Impairment Charges [Abstract]
Other asset impairment recorded in cost of sales										2,800,000
Newport, Wales [Member]
Reported in asset impairment, restructuring and other charges (recoveries):
Asset impairment								0		48,885,000
Severance and workforce reduction costs (recoveries)								0		1,815,000
Other charges								0		33,000
Total asset impairment, restructuring and other charges (recoveries)										50,733,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								52,400,000
Total estimated cost of initiative attributable to non-cash charges								48,900,000
Restructuring costs incurred to date										52,000,000
Costs related to moving and installing equipment									500,000
Cash payments for this initiative									900,000	3,200,000
Newport, Wales [Member] | Severance and Workforce Reduction Costs (Recoveries) [Member]
Changes in restructuring related accruals [Roll Forward]
Balance at beginning of period							359,000		359,000
Charged to asset impairment, restructuring and other charges										1,815,000
Costs paid									(347,000)	(1,574,000)
Foreign exchange gains									(12,000)	118,000
Balance at end of period										359,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								1,800,000
Newport, Wales [Member] | Asset Impairment Charges [Member]
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								48,900,000
Newport, Wales [Member] | Facility Closing [Member]
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								1,700,000
El Segundo [Member]
Reported in asset impairment, restructuring and other charges (recoveries):
Asset impairment								0
Severance and workforce reduction costs (recoveries)								(3,426,000)	357,000	3,571,000
Other charges								0		654,000
Total asset impairment, restructuring and other charges (recoveries)								(3,426,000)	357,000	4,225,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								12,100,000
Total estimated cost of initiative attributable to non-cash charges								400,000
Total estimated cost of initiative attributable to facilities closure costs relating to equipment								1,000,000
Cash payments for this initiative								200,000	1,600,000	3,500,000
Accrued retention bonuses								500,000
El Segundo [Member] | Severance and Workforce Reduction Costs (Recoveries) [Member]
Changes in restructuring related accruals [Roll Forward]
Balance at beginning of period			4,896,000				3,535,000	4,896,000	3,535,000
Charged to asset impairment, restructuring and other charges									357,000	3,610,000
Charged to operating expenses									1,006,000	468,000
Costs paid									(2,000)	(504,000)
Change in provision								(4,435,000)		(39,000)
Balance at end of period				4,896,000				461,000	4,896,000	3,535,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								5,900,000
El Segundo [Member] | Facility Closing [Member]
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								6,200,000
El Segundo [Member] | Severance [Member]
Total estimated costs of initiative [Abstract]
Restructuring costs incurred to date									4,000,000
Recoveries recorded for previously accrued severance costs								3,500,000
El Segundo [Member] | Other Workforce Reduction Costs [Member]
Total estimated costs of initiative [Abstract]
Restructuring costs incurred to date									1,700,000
El Segundo [Member] | Other Charges [Member]
Total estimated costs of initiative [Abstract]
Restructuring costs incurred to date									3,900,000
Research and Development Facility [Member]
Reported in asset impairment, restructuring and other charges (recoveries):
Asset impairment								0
Severance and workforce reduction costs (recoveries)								0	(47,000)	381,000
Other charges								67,000	95,000	273,000
Total asset impairment, restructuring and other charges (recoveries)								67,000	48,000	654,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax								9,000,000
Total estimated cost of initiative attributable to cash outlay								5,400,000
Restructuring costs incurred to date									7,400,000
Cash payments for this initiative								100,000	300,000	1,700,000
Other Activities and Charges (Recoveries) [Member]
Reported in asset impairment, restructuring and other charges (recoveries):
Asset impairment								0
Severance and workforce reduction costs (recoveries)								0	(116,000)	881,000
Other charges								0
Total asset impairment, restructuring and other charges (recoveries)									(116,000)	881,000
Total estimated costs of initiative [Abstract]
Total estimated cost of initiative, pre-tax										900,000
Total estimated cost of initiative attributable to cash outlay										900,000
Other Activities and Charges (Recoveries) [Member] | Severance [Member]
Total estimated costs of initiative [Abstract]
Restructuring charges incurred										900,000
All Other [Member] | Severance and Workforce Reduction Costs (Recoveries) [Member]
Changes in restructuring related accruals [Roll Forward]
Balance at beginning of period							376,000		376,000	1,091,000
Charged to asset impairment, restructuring and other charges										1,678,000
Charged to operating expenses									31,000	238,000
Costs paid									(244,000)	(2,216,000)
Foreign exchange gains										1,000
Change in provision									(163,000)	(416,000)
Balance at end of period										$ 376,000