Quarterly Financial Data (Unaudited) (Income Statement Effects of Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 29, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011	Apr. 01, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 29, 2012	Jul. 01, 2011	Jul. 02, 2010
Effect of Fourth Quarter Events [Line Items]
Charges for product transition, product discontinuances and inventory mark-downs	$ 0	$ 0	$ 0.9	$ 0.1	$ 3.3	$ 3.3	$ 0	$ 0	$ 3.4	$ 20.2	$ 13.5
Amortization of purchased technology and intangible assets	0.3	0.3	0.8	0.9	0.9	0.8	0.9	0.8	1.6	2.8	5.0
Restructuring charges	0.9	0.4	0.1	0.9	2.1	4.3	3.4	5.6	2.3	15.4	7.1
Goodwill impairment charges	0	0	5.6	0					5.6	0	0
Amortization of fair value adjustments related to fixed assets and inventory					0	0	0.1	0.1
Rebranding and transitional costs					0	0.1	0.6	0.2
Loss on sale of NetBoss assets	(0.1)	0.5	0.4	0	0.2	0	0.5	3.9	0	4.6	0
Transactional tax assessment	0	0.3	0.3	0	2.3	0	0.5	0
Liquidation of entities					0.8	0	0	0
Other					(0.9)	0	0	0
Share-based compensation expense	1.5	1.4	1.3	1.0	1.4	1.4	1.2	0.8	5.2	4.8	3.2
Total operating expenses	2.6	2.9	9.4	2.9	10.1	9.9	7.2	11.4	144.4	162.7	244.3
Loss from discontinued operations	$ 0.3	$ 2.4	$ 2.8	$ 3.1	$ 13.6	$ 11.3	$ 2.5	$ 4.3	$ (8.6)	$ (31.7)	$ (21.8)