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Debt - 0.625% Senior Convertible Notes (“2033 Notes”) (Narrative) (Details)			3 Months Ended	12 Months Ended
	May 29, 2018 USD ($) day $ / shares	Aug. 21, 2013 USD ($) d $ / shares	Jun. 27, 2015 noteholder	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)	Aug. 17, 2015 $ / shares	Aug. 15, 2013
Debt Instrument [Line Items]
Proceeds from issuance of senior convertible debt				$ 225,000,000	$ 460,000,000	$ 0
Loss on extinguishment of debt				5,000,000	1,100,000	$ 0
Convertible Debt
Debt Instrument [Line Items]
Carrying value of liability component				833,200,000	931,400,000
Carrying value of the equity component of convertible debt				239,100,000	229,700,000
Unamortized debt issuance cost				$ 7,700,000	9,200,000
Convertible Debt | 1.75% Senior Convertible Notes
Debt Instrument [Line Items]
Interest rate on senior convertible notes	1.75%			1.75%
Face amount of senior convertible notes	$ 225,000,000.0
Initial conversion price (usd per share) | $ / shares	$ 13.94
Premium to closing sale price of common stock (percent)	37.50%
Threshold percentage of stock price trigger	98.00%
Threshold trading days (days) | day	20
Threshold consecutive trading days (days) | day	30
Fundamental change in price (percent)	100.00%
Redemption price (percent)	100.00%
Effective rate	5.30%
Carrying value of liability component	$ 190,100,000
Carrying value of the equity component of convertible debt	$ 34,900,000
Expected remaining term of Notes	4 years 11 months
Unamortized debt issuance cost				$ 1,800,000
Fair value of Notes				$ 232,400,000
Convertible Debt | 0.625% Senior Convertible Notes
Debt Instrument [Line Items]
Interest rate on senior convertible notes		0.625%		0.625%
Face amount of senior convertible notes		$ 650,000,000.0
Proceeds from issuance of senior convertible debt, after issuance costs		$ 636,300,000
Initial conversion price (usd per share) | $ / shares		$ 18.83					$ 11.28
Premium to closing sale price of common stock (percent)								40.00%
Threshold consecutive trading days (days) | d		30
Threshold consecutive business days (days)		5 days
Convertible period of consecutive trading days (days)		10 days
Number of holders | noteholder			0
Fundamental change in price (percent)		100.00%
Redemption price (percent)		100.00%
Discount rate		5.40%
Discount period		5 years
Effective rate		5.40%
Carrying value of liability component		$ 515,600,000
Carrying value of the equity component of convertible debt		134,400,000
Expected remaining term of Notes				1 month 7 days
Issuance costs		13,700,000
Liability component of issuance costs		10,900,000
Equity component of issuance costs		$ 2,800,000
Unamortized debt issuance cost				$ 100,000
Repurchased aggregate principal amount				181,500,000
Value of notes exchanged				198,000,000
Loss on extinguishment of debt				5,000,000
Senior Convertible notes outstanding				277,000,000
Fair value of Notes				$ 281,000,000	$ 676,100,000
Convertible Debt | 0.625% Senior Convertible Notes | Minimum
Debt Instrument [Line Items]
Threshold percentage of stock price trigger		130.00%
Threshold trading days (days) | d		20
Convertible Debt | 0.625% Senior Convertible Notes | Maximum
Debt Instrument [Line Items]
Threshold price as a percentage of closing price of common stock		98.00%
Exchange Transaction | Convertible Debt | 1.75% Senior Convertible Notes
Debt Instrument [Line Items]
Proceeds from issuance of senior convertible debt	$ 155,500,000
Exchange Transaction | Convertible Debt | 0.625% Senior Convertible Notes
Debt Instrument [Line Items]
Value of notes exchanged	$ 151,500,000

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