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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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