Comprehensive Income and Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 30, 2011	Dec. 31, 2010	Dec. 30, 2011	Dec. 31, 2010	Jul. 01, 2011
Comprehensive Income
Net income	$ 132.3	$ 151.1	$ 253.4	$ 315.0
Other comprehensive income (loss):
Foreign currency translation	(11.6)	5.0	(51.0)	15.5
Net unrealized gain (loss) on hedging derivatives, net of income taxes	0.2	0.3	0.6	(0.1)
Net unrealized gain (loss) on securities available-for-sale, net of income taxes	(0.1)	1.0	0.3	0.1
Amortization of loss on treasury lock, net of income taxes	0.2	0.1	0.3	0.3
Recognition of pension actuarial losses in net income, net of income taxes	1.0	1.4	2.2	1.5
Total comprehensive income	122.0	158.9	205.8	332.3
Comprehensive loss attributable to noncontrolling interests	0.8	0	1.3	0
Total comprehensive income attributable to Harris Corporation	122.8	158.9	207.1	332.3
Components of accumulated other comprehensive loss
Foreign currency translation	(0.2)		(0.2)		50.8
Net unrealized gain on hedging derivatives, net of income taxes	0.5		0.5		(0.1)
Net unrealized gain on securities available-for-sale, net of income taxes	1.4		1.4		1.1
Unamortized loss on treasury lock, net of income taxes	(3.2)		(3.2)		(3.5)
Unrecognized pension obligations, net of income taxes	(27.4)		(27.4)		(29.6)
Accumulated other comprehensive income (loss)	$ (28.9)		$ (28.9)		$ 18.7