CONDENSED CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 27, 2019	Sep. 28, 2018
Income Statement [Abstract]
Revenue from product sales and services	$ 4,431	$ 1,542
Cost of product sales and services	(3,242)	(1,010)
Engineering, selling and administrative expenses	(999)	(279)
Gain on sale of business	229	0
Non-operating income	79	47
Interest income	9	1
Interest expense	(67)	(44)
Income from continuing operations before income taxes	440	257
Income taxes	(5)	(41)
Income from continuing operations	435	216
Discontinued operations, net of income taxes	0	(3)
Net income	435	213
Noncontrolling interests, net of income taxes	(6)	0
Net income attributable to L3Harris Technologies, Inc.	429	213
Amounts attributable to L3Harris Technologies, Inc. common shareholders
Income from continuing operations	429	216
Discontinued operations, net of income taxes	$ 0	$ (3)
Basic
Continuing operations (in dollars per share)	$ 1.93	$ 1.82
Discontinued operations (in dollars per share)	0	(0.01)
Basic (in dollars per share)	1.93	1.81
Diluted
Continuing operations (in dollars per share)	1.90	1.78
Discontinued operations (in dollars per share)	0	(0.01)
Diluted (in dollars per share)	$ 1.90	$ 1.77
Basic weighted average common shares outstanding (in shares)	222.6	117.9
Diluted weighted average common shares outstanding (in shares)	225.4	120.6