| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Operating activities | | | | | | | | |
| Net income | | | 261.9 | 289.4 | 248.6 | 617.1 | 618.4 | 586.3 |
| |
| Adjustments to reconcile net income to cash provided by operating activities: | | | | | | | | |
| Depreciation and amortization | | | 138.0 | 117.9 | 102.0 | 90.3 | 83.2 | 75.0 |
| Share-based compensation | | | 115.5 | 114.5 | 113.4 | 121.2 | 124.4 | 123.5 |
| Non-cash interest expense | | | 3.2 | 3.7 | | | 4.2 | 2.1 |
| Realized (gain) loss on equity investment | | | | -0.2 | | | | |
| Deferred income taxes | | | -4.1 | 16.2 | 15.8 | -260.3 | -260.4 | -260.8 |
| Other non-cash income and expenses | | | 43.6 | 39.4 | 43.6 | 38.7 | 26.2 | 21.6 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable, net | | | -67.7 | -90.7 | -75.5 | -149.1 | -186.8 | -142.5 |
| Inventory | | | -11.0 | -41.6 | -112.2 | -139.8 | -153.5 | -147.3 |
| Prepaid and other assets | | | -76.7 | -99.0 | -21.3 | -8.8 | -2.9 | -15.0 |
| Operating lease right-of-use assets and liabilities, net | | | -4.6 | -1.7 | | 0.4 | 1.5 | 0.3 |
| Accounts payable and accrued liabilities | | | 149.5 | 89.3 | 77.2 | 214.3 | 177.2 | 245.3 |
| Accrued payroll and related expenses | | | -4.5 | 2.9 | 10.4 | 22.3 | 30.7 | 22.2 |
| Deferred revenue and other liabilities | | | 11.4 | 10.4 | 8.7 | 8.6 | 6.2 | 18.7 |
| Net cash provided by operating activities | | | 596.9 | 485.7 | 442.5 | 508.7 | 409.0 | 501.5 |
| |
| Investing activities | | | | | | | | |
| Purchases of marketable securities | | | -2,444.9 | -2,217.6 | -2,473.1 | -2,455.3 | -2,490.1 | -3,494.4 |
| Proceeds from sale and maturity of marketable securities | | | 1,823.6 | 2,118.1 | 2,666.3 | 3,117.3 | 3,029.3 | 2,510.5 |
| Purchases of property and equipment | | | -381.4 | -391.1 | -389.2 | -369.2 | -308.5 | -265.5 |
| Acquisitions, net of cash acquired | | | | -33.4 | -30.2 | -31.6 | | |
| Other investing activities | | | | 8.3 | 10.1 | | -13.0 | -11.4 |
| Net cash used in investing activities | | | -1,023.8 | -515.7 | -216.1 | 256.0 | 217.7 | -1,260.8 |
| |
| Financing activities | | | | | | | | |
| Net proceeds from issuance of common stock | | | | 21.7 | | 20.3 | | 17.3 |
| Other financing activities | | | -10.7 | -6.8 | -9.9 | -14.0 | -17.3 | -17.1 |
| Net cash provided by financing activities | | | 11.0 | 14.9 | 10.4 | 6.3 | 0.0 | 906.4 |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | | | -6.8 | -2.0 | -1.4 | 0.4 | 2.4 | 2.2 |
| |
| Reconciliation of cash, cash equivalents and restricted cash, end of period: | | | | | | | | |
| Cash and cash equivalents | | | | | | | | |
| Restricted cash | | | | | | | | |
| |
| Supplemental disclosure of non-cash investing and financing transactions: | | | | | | | | |
| Shares issued for conversions of 2023 Notes | | | | | | | | |
| Shares received under note hedge upon conversion of 2023 Notes | | | | | | | | |
| Acquisition of property and equipment included in accounts payable and accrued liabilities | | | 62.0 | 37.0 | 45.4 | 37.7 | 61.5 | 50.7 |