Business Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Mar. 30, 2012	Apr. 01, 2011	Jul. 01, 2011
Summary of total assets by business segment
Total assets	$ 5,648.9		$ 5,648.9		$ 6,172.8
Revenue and segment operating income (loss)
Revenue from product sales and services	1,476.0	1,412.8	4,372.3	4,255.4
Unallocated corporate expense	(18.6)	(19.8)	(59.2)	(67.5)
Corporate eliminations, operating income	(4.6)	(7.8)	(12.4)	(17.1)
Non-operating income (loss)	8.1	(0.3)	11.7	(1.6)
Net interest expense	(27.5)	(25.8)	(83.6)	(64.1)
Loss from continuing operations before income taxes	(202.9)	209.1	189.0	689.5
Business Segments (Textuals)
Non-cash impariment charges	424.0	0	424.0	0
RF Communications [Member]
Summary of total assets by business segment
Total assets	1,372.4		1,372.4		1,378.7
Revenue and segment operating income (loss)
Revenue from product sales and services	537.7	550.0	1,560.5	1,661.2
Segment operating income (loss)	181.6	178.5	508.0	596.3
Integrated Network Solutions [Member]
Summary of total assets by business segment
Total assets	2,504.7		2,504.7		2,902.5
Revenue and segment operating income (loss)
Revenue from product sales and services	499.6	462.4	1,569.8	1,398.6
Segment operating income (loss)	(406.0)	24.5	(365.6)	79.7
Business Segments (Textuals)
Non-cash impariment charges	424.0
Charge for integration and other acquisition-related costs	11.1	10.8	30.4	17.0
Operating Loss From New Business	4.7		13.0
Government Communications Systems [Member]
Summary of total assets by business segment
Total assets	1,011.3		1,011.3		956.4
Revenue and segment operating income (loss)
Revenue from product sales and services	470.5	431.2	1,336.6	1,277.0
Segment operating income (loss)	64.1	59.8	190.1	163.8
Corporate [Member]
Summary of total assets by business segment
Total assets	711.5		711.5		769.0
Revenue and segment operating income (loss)
Corporate eliminations, revenue	(31.8)	(30.8)	(94.6)	(81.4)
Discontinued operations [Member]
Summary of total assets by business segment
Total assets	$ 49.0		$ 49.0		$ 166.2