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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Operating activities    
Net income $ 164.5 $ 148.2
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 85.3 80.4
Share-based compensation 74.9 61.7
Non-cash interest expense 3.6 3.2
Realized (gain) loss on equity investment 0.0 (0.2)
Deferred income taxes (51.5) (19.8)
Other non-cash income and expenses (29.4) 16.0
Changes in operating assets and liabilities:    
Accounts receivable, net (37.1) (47.1)
Inventory (115.0) 16.7
Prepaid and other assets (3.4) (82.5)
Operating lease right-of-use assets and liabilities, net (2.1) (3.4)
Accounts payable and accrued liabilities 277.0 96.0
Accrued payroll and related expenses (25.5) (31.1)
Deferred revenue and other liabilities 4.4 5.7
Net cash provided by operating activities 345.7 243.8
Investing activities    
Purchases of marketable securities (2,149.9) (1,143.7)
Proceeds from sale and maturity of marketable securities 1,557.0 785.6
Purchases of property and equipment (133.7) (193.1)
Acquisitions, net of cash acquired 0.0 (3.2)
Other investing activities (16.0) (2.3)
Net cash used in investing activities (742.6) (556.7)
Financing activities    
Net proceeds from issuance of common stock 12.3 10.1
Purchases of treasury stock (188.7) 0.0
Proceeds from issuance of senior convertible notes, net of issuance costs 1,230.6 0.0
Purchases of capped call transactions (101.3) 0.0
Other financing activities (2.2) (9.1)
Net cash provided by financing activities 950.7 1.0
Effect of exchange rate changes on cash, cash equivalents and restricted cash (1.1) (5.3)
Increase (decrease) in cash, cash equivalents and restricted cash 552.7 (317.2)
Cash, cash equivalents and restricted cash, beginning of period 643.3 1,053.6
Cash, cash equivalents and restricted cash, end of period 1,196.0 736.4
Reconciliation of cash, cash equivalents and restricted cash, end of period:    
Cash and cash equivalents 1,194.9 735.4
Restricted cash 1.1 1.0
Total cash, cash equivalents and restricted cash 1,196.0 736.4
Supplemental disclosure of non-cash investing and financing transactions:    
Shares issued for conversions of 2023 Notes 0.0 35.9
Shares received under note hedge upon conversion of 2023 Notes 0.0 (33.5)
Acquisition of property and equipment included in accounts payable and accrued liabilities 53.4 59.8
Right-of-use assets obtained in exchange for operating lease liabilities 4.1 (0.8)
Right-of-use assets obtained in exchange for finance lease liabilities $ 1.5 $ 15.7