Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Jan. 01, 2022	Jan. 02, 2021	May 29, 2018	Mar. 03, 2017
Numerator:
Net income (loss)	$ 34.6	$ 27.3	$ (20.2)	$ 47.0
Weighted-average shares outstanding:
Basic (in shares)	236.0	228.8	233.6	228.8
Shares issuable assuming conversion of convertible notes (in shares)	4.3	0.3	0.0	0.2
Effect of dilutive securities from stock-based benefit plans (in shares)	2.0	2.0	0.0	2.5
Diluted (in shares)	242.3	231.1	233.6	231.5
Net income (loss) per share:
Basic (in dollars per share)	$ 0.15	$ 0.12	$ (0.09)	$ 0.21
Dilutive (in dollars per share)	$ 0.14	$ 0.12	$ (0.09)	$ 0.20
Convertible notes
Total potentially dilutive securities (in shares)	0.5	0.0	7.1	0.5
2024 Notes | Convertible Notes
Convertible notes
Stated interest rate	1.00%		1.00%			1.00%
Conversion price of debt (in dollars per share)			$ 13.22
2023 Notes | Convertible Notes
Convertible notes
Stated interest rate	1.75%		1.75%		1.75%
Conversion price of debt (in dollars per share)			$ 13.94
RSUs
Convertible notes
Total potentially dilutive securities (in shares)	0.5	0.0	0.8	0.5
Convertible Debt Securities
Convertible notes
Total potentially dilutive securities (in shares)	0.0	0.0	6.3	0.0