The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Debt - 1.00% Senior Convertible Notes (2024 Notes) (Details)			1 Months Ended	12 Months Ended
	Mar. 22, 2017 USD ($) day	Feb. 27, 2017	Mar. 22, 2017 USD ($)	Jul. 02, 2022 USD ($) day $ / shares shares	Jul. 03, 2021 USD ($)	Mar. 03, 2017 USD ($)
Debt Instrument [Line Items]
Short-term debt \| $				$ 68,400,000	$ 456,600,000
Convertible Debt
Debt Instrument [Line Items]
Unamortized debt issuance cost \| $				$ 1,000,000.0	$ 900,000
Convertible Debt \| 1.00% Senior Convertible Notes
Debt Instrument [Line Items]
Interest rate on senior convertible notes				1.00%	1.00%	1.00%
Face amount of senior convertible notes \| $	$ 60,000,000		$ 60,000,000			$ 400,000,000
Proceeds from issuance of senior convertible debt, after issuance costs \| $			451,100,000
Conversion rate (shares) \| shares				75.6229
Initial conversion price (usd per share) \| $ / shares				$ 13.22
Premium to closing sale price of common stock (percent)		32.50%
Threshold percentage of stock price trigger				130.00%
Threshold trading days (days)				20
Threshold consecutive trading days (days)				30
Repurchase price (percent)	100.00%
Issuance costs \| $	$ 8,900,000		$ 8,900,000
Unamortized debt issuance cost \| $				$ 1,000,000
Short-term debt \| $					$ 456,600,000
Expected remaining term				1 year 8 months 12 days
Convertible Debt \| 1.00% Senior Convertible Notes \| Conversion criteria 1
Debt Instrument [Line Items]
Threshold percentage of stock price trigger				130.00%
Threshold trading days (days)				20
Threshold consecutive trading days (days)				30
Convertible Debt \| 1.00% Senior Convertible Notes \| Conversion criteria 2
Debt Instrument [Line Items]
Threshold trading days (days)	45
Trading days used to calculate stock price trigger (days)	10
Convertible Debt \| 1.00% Senior Convertible Notes \| Conversion criteria 3
Debt Instrument [Line Items]
Threshold percentage of stock price trigger	10.00%
Convertible Debt \| 1.00% Senior Convertible Notes \| Conversion criteria 4
Debt Instrument [Line Items]
Threshold percentage of stock price trigger	98.00%
Threshold consecutive trading days (days)	10
Threshold consecutive business days (days)	5