Restructuring And Impairments (Summary Of Restructuring And Impairment Costs) (Details) (USD $) In Millions	3 Months Ended
	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011
Accrual Balance, Beginning balance	$ 12.0	$ 10.6	$ 11.0
New Charges	4.1	3.0	2.5
Cash Paid	(2.6)	(1.5)	(2.9)
Reserve Release		(0.1)
Non-Cash Items
Accrual Balance, Ending balance	13.5	12.0	10.6
Employee Separation Costs [Member] | 2009 Infrastructure Realignment Program [Member]
Accrual Balance, Beginning balance	8.8	8.4	8.1
New Charges	0.6	0.5	0.6
Cash Paid			(0.3)
Reserve Release		(0.1)
Non-Cash Items
Accrual Balance, Ending balance	9.4	8.8	8.4
Employee Separation Costs [Member] | 2010 Infrastructure Realignment Program [Member]
Accrual Balance, Beginning balance	2.3	1.7	2.2
New Charges	1.7	0.9	1.0
Cash Paid	(0.9)	(0.3)	(1.5)
Reserve Release
Non-Cash Items
Accrual Balance, Ending balance	3.1	2.3	1.7
Employee Separation Costs [Member] | 2011 Infrastructure Realignment Program [Member]
Accrual Balance, Beginning balance	0.6
New Charges	1.7	1.3	0.7
Cash Paid	(1.4)	(0.7)	(0.7)
Reserve Release
Non-Cash Items
Accrual Balance, Ending balance	0.9	0.6
Lease Impairment Costs [Member] | 2008 Infrastructure Realignment Program [Member]
Accrual Balance, Beginning balance	0.3	0.5	0.7
Cash Paid	(0.2)	(0.2)	(0.2)
Reserve Release
Non-Cash Items
Accrual Balance, Ending balance	0.1	0.3	0.5
Fab Closure Costs [Member] | 2009 Infrastructure Realignment Program [Member]
Accrual Balance, Beginning balance	0
New Charges	0.1	0.3	0.2
Cash Paid	(0.1)	(0.3)	(0.2)
Reserve Release
Non-Cash Items
Accrual Balance, Ending balance	$ 0	$ 0