CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities
Net income	$ 356.4	$ 351.0
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	36.6	38.5
Non-cash operating lease cost	6.1	7.7
Stock-based compensation	40.2	44.6
Loss (gain) on investments, net	12.5	(1.0)
Deferred income taxes	(24.3)	(35.8)
Other	3.6	0.5
Changes in operating assets and liabilities:
Accounts and other receivables, net	(43.7)	(55.0)
Inventories	(0.1)	(69.5)
Accounts payable and accrued liabilities	(103.4)	(89.1)
Income taxes	51.2	(263.1)
Prepaid expenses and other current assets	10.6	27.1
Intellectual property agreement accrual	(36.7)	(5.2)
Other	(28.6)	(4.2)
Net cash provided by (used in) operating activities	280.4	(53.5)
Cash flows from investing activities
Capital expenditures	(56.0)	(65.3)
Purchases of held-to-maturity investments (Note 5)	(12.8)	(0.8)
Proceeds from held-to-maturity investments (Note 5)	17.7	9.3
Purchases of available-for-sale investments (Note 5)	(634.5)	(1.8)
Proceeds from available-for-sale investments (Note 5)	827.9	157.3
Investments in intangible assets	0.0	(20.0)
Payment for working capital adjustment for sale of product group (Note 4)	(36.3)	0.0
Payment for acquisition options	(3.0)	(10.8)
Issuances of notes receivable	(17.8)	(2.5)
Other	0.1	(2.3)
Net cash provided by investing activities	85.3	63.1
Cash flows from financing activities
Purchases of treasury stock	(258.6)	(0.2)
Equity forward contract related to accelerated share repurchase agreement (Note 10)	(50.0)	0.0
Proceeds from stock plans	49.9	62.1
Other	0.7	(0.2)
Net cash (used in) provided by financing activities	(258.0)	61.7
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	(17.7)	9.7
Net increase in cash, cash equivalents, and restricted cash	90.0	81.0
Cash, cash equivalents, and restricted cash at beginning of period	3,058.8	1,148.0
Cash, cash equivalents, and restricted cash at end of period (Note 2)	$ 3,148.8	$ 1,229.0