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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Operating activities    
Net income $ 285.2 $ 249.4
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 133.5 119.6
Share-based compensation 113.9 92.5
Non-cash interest expense 5.8 4.7
Realized (gain) loss on equity investment (1.0) (0.2)
Deferred income taxes (136.5) (53.6)
Other non-cash income and expenses (47.3) 31.9
Changes in operating assets and liabilities:    
Accounts receivable, net (72.9) (51.6)
Inventory (193.6) 43.6
Prepaid and other assets 13.2 (81.2)
Operating lease right-of-use assets and liabilities, net (4.4) (6.1)
Accounts payable and accrued liabilities 496.5 171.3
Accrued payroll and related expenses 16.6 (14.0)
Deferred revenue and other liabilities 5.9 30.7
Net cash provided by operating activities 614.9 537.0
Investing activities    
Purchases of marketable securities (2,947.9) (1,397.7)
Proceeds from sale and maturity of marketable securities 2,228.4 1,387.8
Purchases of property and equipment (184.1) (301.3)
Acquisitions, net of cash acquired 0.0 (3.9)
Other investing activities (18.5) (12.3)
Net cash used in investing activities (922.1) (327.4)
Financing activities    
Net proceeds from issuance of common stock 26.6 22.5
Purchases of treasury stock (188.7) (557.7)
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
Payments for conversions of senior convertible notes (650.5) 0.0
Other financing activities (3.4) (16.3)
Net cash provided by (used in) financing activities 313.3 (551.5)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (4.6) (12.6)
Increase (decrease) in cash, cash equivalents and restricted cash 1.5 (354.5)
Cash, cash equivalents and restricted cash, beginning of period 643.3 1,053.6
Cash, cash equivalents and restricted cash, end of period 644.8 699.1
Reconciliation of cash, cash equivalents and restricted cash, end of period:    
Cash and cash equivalents 643.7 698.1
Restricted cash 1.1 1.0
Total cash, cash equivalents and restricted cash 644.8 699.1
Supplemental disclosure of non-cash investing and financing transactions:    
Shares issued for conversions of 2023 Notes 1,316.4 35.9
Shares received under note hedge upon conversion of 2023 Notes (1,296.1) (33.5)
Acquisition of property and equipment included in accounts payable and accrued liabilities 47.0 60.3
Right-of-use assets obtained in exchange for operating lease liabilities 6.0 (0.7)
Right-of-use assets obtained in exchange for finance lease liabilities $ 1.8 $ 15.8