Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	May 29, 2018	Mar. 03, 2017
Numerator:
Net income	$ 14.3	$ 6.8
Weighted-average shares outstanding:
Basic (in shares)	228.8	229.4
Shares issuable assuming conversion of convertible notes (in shares)	0.0	2.8
Effect of dilutive securities from stock-based benefit plans (in shares)	3.0	4.2
Diluted (in shares)	231.8	236.4
Net income per share:
Basic (in dollars per share)	$ 0.06	$ 0.03
Dilutive (in dollars per share)	$ 0.06	$ 0.03
2024 Notes | Convertible Notes
Convertible notes
Interest rate on senior convertible notes	1.00%			1.00%
Conversion price of debt (in dollars per share)	$ 13.22
2023 Notes | Convertible Notes
Convertible notes
Interest rate on senior convertible notes	1.75%		1.75%
Conversion price of debt (in dollars per share)	$ 13.94
Restricted stock units
Anti-dilutive securities excluded from computation of earnings per share
Total potentially dilutive securities (in shares)	1.0	0.1