Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Change in Accounting Estimate [Line Items]
Revenue recognized from performance obligations satisfied in prior periods	$ 18	$ 5	$ 34	$ 35
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Operating income (loss)	6	(4)	5	(15)
Operating income (loss), net of tax	$ 4	$ (3)	$ 4	$ (11)
Operating income (loss), per diluted share (in dollars per share)	$ 0.03	$ (0.02)	$ 0.03	$ (0.09)