| In millions, except per share items | Jun-25-23 | Jun-26-22 | Jun-27-21 | Jun-28-20 | Jun-30-19 | Jun-24-18 | Jun-25-17 | Jun-26-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Operating activities: | | | | | | | | |
| Net loss | -329.9 | -200.9 | -522.5 | -190.6 | -375.1 | -16.4 | -98.1 | -21.5 |
| |
| Adjustments to reconcile net loss to cash used in operating activities: | | | | | | | | |
| Depreciation and amortization | 164.0 | 129.8 | 120.9 | 97.1 | 86.2 | 111.6 | 150.5 | 159.1 |
| Amortization of debt issuance costs and discount, net of non-cash capitalized interest | 7.5 | 20.1 | 32.8 | 26.2 | 18.3 | | | |
| Stock-based compensation | 81.9 | 60.9 | 53.2 | 47.2 | 42.9 | 37.9 | 47.7 | 58.7 |
| Loss on disposal or impairment of long-lived assets, including loss on disposal portion of factory optimization and start-up costs | 3.8 | 1.0 | 5.0 | 4.5 | 5.0 | 8.4 | 2.5 | 16.9 |
| Amortization of (premium) discount on investments, net | -4.7 | 6.1 | 6.9 | 1.7 | 2.3 | 4.7 | 5.4 | 5.3 |
| Realized gain on sale of investments | | -0.3 | -0.4 | -1.5 | 0.1 | 0.1 | -7.5 | 15.4 |
| Gain on equity investment | | | -8.3 | | | | | |
| Foreign exchange gain on equity investment | | | -2.2 | -2.2 | 1.3 | -0.6 | -2.6 | 2.1 |
| Deferred income taxes | 0.5 | 0.7 | 0.9 | -0.5 | -0.6 | -39.3 | 74.9 | -15.8 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable, net | -4.6 | -54.3 | -23.5 | -3.2 | -10.4 | -16.4 | 17.0 | 21.8 |
| Inventories | -97.5 | -68.8 | -44.6 | -8.5 | -24.3 | 9.5 | 10.5 | -23.3 |
| Prepaid expenses and other assets | -18.5 | -0.4 | -20.0 | -3.0 | -3.6 | -10.3 | 17.4 | 8.1 |
| Accounts payable, trade | 30.0 | 29.2 | 21.7 | -7.2 | 24.3 | 13.7 | -4.8 | -12.1 |
| Accrued salaries and wages and other liabilities | -1.1 | -10.5 | 15.3 | -24.9 | 40.8 | 16.7 | 0.2 | -11.4 |
| Cash used in operating activities | -142.6 | -154.2 | -125.5 | -29.0 | 202.3 | 173.5 | 220.5 | 203.3 |
| |
| Investing activities: | | | | | | | | |
| Purchases of property and equipment | -955.8 | -644.9 | -570.5 | -229.9 | -124.7 | -172.3 | -86.9 | -120.0 |
| Purchases of patent and licensing rights | -6.5 | -5.7 | -5.9 | -4.4 | -3.3 | -5.6 | -12.4 | -14.4 |
| Proceeds from sale of property and equipment, including insurance proceeds | 1.7 | 3.1 | 2.3 | 2.6 | 0.3 | 0.6 | 1.4 | 5.3 |
| Purchases of short-term investments | -1,191.0 | -475.0 | -475.0 | -821.4 | -517.2 | -200.7 | -200.4 | -220.8 |
| Proceeds from maturities of short-term investments | 637.2 | 242.3 | 428.3 | 460.6 | 177.4 | 224.2 | 125.9 | 312.5 |
| Proceeds from sale of short-term investments | 110.1 | 225.2 | 51.7 | 118.0 | 46.4 | 177.0 | 27.2 | 42.1 |
| Reimbursement of property and equipment purchases from long-term incentive agreement | 155.5 | 139.0 | 10.7 | | | | | |
| Cash used in investing activities | -1,147.0 | -391.0 | -448.6 | -486.9 | -227.1 | -423.9 | -145.2 | -7.9 |
| |
| Financing activities: | | | | | | | | |
| Proceeds from convertible notes | 1,750.0 | 750.0 | | 575.0 | 575.0 | | | |
| Proceeds from issuance of common stock | 23.8 | 22.4 | 539.7 | 76.4 | 158.0 | 92.6 | 17.7 | |
| Commitment fees on long-term incentive agreement | -1.0 | -1.0 | -0.5 | | | | | |
| Cash provided by financing activities | 2,597.1 | 615.9 | 504.1 | 464.3 | 406.5 | 236.5 | -108.7 | -167.9 |