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Long-term Debt - Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 29, 2019	Dec. 30, 2018
Debt Instrument [Line Items]
Amortization of discount and issuance costs			$ 11.4	$ 7.2
Convertible Notes | Convertible Notes due September 1, 2023
Debt Instrument [Line Items]
Interest expense	$ 1.2	$ 1.3	2.5	1.7
Amortization of discount and issuance costs	5.8	5.4	11.4	7.2
Total interest expense	$ 7.0	$ 6.7	$ 13.9	$ 8.9

X

- Definition

Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-Publisher FASB
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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- Definition

Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

+ References

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