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Debt - Additional Information (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 03, 2017 | Aug. 21, 2013 | Mar. 31, 2017 | Dec. 30, 2017 | Dec. 30, 2017 | Dec. 31, 2016 | Jul. 01, 2017 | Mar. 22, 2017
Debt details |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | $ 3,800,000 | $ 0 |  |
1.00% Senior Convertible Notes | Convertible Notes |  |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |  |
Interest rate on senior convertible notes |  |  |  | 1.00% | 1.00% |  |  |
Aggregate principal amount of convertible debt | $ 400,000,000 |  |  |  |  |  |  | $ 60,000,000
Proceeds from debt, net of issuance costs |  |  | $ 451,100,000 |  |  |  |  |
Discount rate | 4.80% |  |  |  |  |  |  |
Derivative, term of contract | 7 years |  |  |  |  |  |  |
Amount outstanding |  |  |  | $ 460,000,000 | $ 460,000,000 |  | $ 460,000,000 |
Fair market value of convertible debt |  |  |  | $ 453,400,000 | $ 453,400,000 |  | 481,700,000 |
0.625% Senior Convertible Notes | Convertible Notes |  |  |  |  |  |  |  |
Debt details |  |  |  |  |  |  |  |
Interest rate on senior convertible notes |  | 0.625% |  | 0.625% | 0.625% |  |  |
Aggregate principal amount of convertible debt |  | $ 650,000,000.0 |  |  |  |  |  |
Proceeds from debt, net of issuance costs |  | $ 636,300,000 |  |  |  |  |  |
Discount rate |  | 5.40% |  |  |  |  |  |
Derivative, term of contract |  | 5 years |  |  |  |  |  |
Redemption percentage |  | 100.00% |  |  |  |  |  |
Expected remaining term |  |  |  |  | 7 months 18 days |  |  |
Principal amount of debt repurchased |  |  |  | $ 12,500,000 | $ 159,000,000 |  |  |
Cash paid for repurchase of debt |  |  |  | 13,000,000 | 175,000,000 |  |  |
Loss on extinguishment of debt |  |  |  | 200,000 | 3,800,000 |  |  |
Amount outstanding |  |  |  | 451,000,000 | 451,000,000 |  | 610,000,000 |
Fair market value of convertible debt |  |  |  | $ 465,700,000 | $ 465,700,000 |  | $ 676,100,000 |

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