Stock-Based Compensation - Stock Option Activity (Details) - $ / shares shares in Millions	12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jul. 01, 2017
Number of Shares
Balance beginning of period (in shares)	1.3	1.5	3.1
Exercised (in shares)	(0.1)	(0.2)	(1.6)
Balance at end of the period (in shares)	1.2	1.3	1.5
Expected to vest (in shares)	1.2
Weighted-Average Exercise Price
Balance at beginning of period (in dollars per share)	$ 6.42	$ 6.16	$ 5.91
Exercised (in dollars per share)	10.54	4.53	5.66
Balance at end of period (in dollars per share)	5.95	$ 6.42	$ 6.16
Expected to vest (in dollars per share)	$ 5.95