BUSINESS SEGMENTS Reconciliation of Assets from Segments (Details) - USD ($) $ in Millions	Jun. 28, 2019	Jun. 29, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Assets	$ 10,117	$ 9,851	$ 10,112
Identifiable intangibles	870	989	$ 1,104
Corporate
Segment Reporting Information [Line Items]
Assets	2,156	1,917
Corporate | Exelis
Segment Reporting Information [Line Items]
Identifiable intangibles	869	974
Communication Systems | Operating Segments
Segment Reporting Information [Line Items]
Assets	1,565	1,567
Electronic Systems | Operating Segments
Segment Reporting Information [Line Items]
Assets	4,188	4,174
Space and Intelligence Systems | Operating Segments
Segment Reporting Information [Line Items]
Assets	$ 2,208	$ 2,193