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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash flows from operating activities    
Net income $ 351.0 $ 340.5
Adjustments to reconcile net income to net cash (used in) provided by operating activities:    
Depreciation and amortization 38.5 35.2
Non-cash operating lease cost 7.7 6.8
Stock-based compensation (Note 9) 44.6 38.9
Deferred income taxes (35.8) (51.8)
Other (0.5) 1.1
Changes in operating assets and liabilities:    
Accounts and other receivables, net (55.0) (77.5)
Inventories (69.5) (32.8)
Accounts payable and accrued liabilities (89.1) (45.2)
Income taxes (263.1) 87.2
Prepaid expenses and other current assets 27.1 (23.8)
Intellectual property agreement accrual (5.2) 29.3
Other (4.2) 6.2
Net cash (used in) provided by operating activities (53.5) 314.1
Cash flows from investing activities    
Capital expenditures (65.3) (61.5)
Purchases of held-to-maturity investments (Note 5) (0.8) (12.5)
Proceeds from held-to-maturity investments (Note 5) 9.3 80.5
Purchases of available-for-sale investments (Note 5) (1.8) (3.2)
Proceeds from available-for-sale investments (Note 5) 157.3 183.4
Investments in intangible assets (20.0) (13.1)
Business combination, net of cash 0.0 (141.2)
Payment for acquisition options (Note 6) (10.8) (15.0)
Issuances of notes receivable (2.5) (15.0)
Other (2.3) (1.9)
Net cash provided by investing activities 63.1 0.5
Cash flows from financing activities    
Purchases of treasury stock (0.2) (249.3)
Proceeds from stock plans 62.1 41.9
Other (0.2) 0.8
Net cash provided by (used in) financing activities 61.7 (206.6)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash 9.7 (4.2)
Net increase in cash, cash equivalents, and restricted cash 81.0 103.8
Cash, cash equivalents, and restricted cash at beginning of period 1,148.0 772.6
Cash, cash equivalents, and restricted cash at end of period (Note 2) $ 1,229.0 $ 876.4