Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows from operating activities:
Net income (loss)	$ 64.1	$ (0.8)
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	62.6	79.9
Depreciation, amortization, and accretion	36.5	44.2
Deferred income taxes	(34.8)	(26.6)
Provision for inventory excess and obsolescence	6.9	(1.0)
Operating lease assets expense	11.5	10.8
Loss on privately-held investments, net	3.3	14.3
Loss from equity method investment	0.0	2.1
Loss (gain) on publicly-traded investments and others	6.8	(0.3)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	246.2	228.8
Inventory	(3.1)	(22.5)
Prepaid expenses and other assets	14.3	70.2
Accounts payable	(35.3)	(38.3)
Accrued compensation	(145.5)	(79.4)
Income taxes payable	32.4	(24.9)
Other accrued liabilities	(23.5)	(32.5)
Deferred revenue	74.1	101.0
Net cash provided by operating activities	316.5	325.0
Cash flows from investing activities:
Purchases of property and equipment	(24.3)	(34.8)
Purchases of available-for-sale debt securities	(215.4)	(283.5)
Proceeds from sales of available-for-sale debt securities	17.1	6.1
Proceeds from maturities and redemptions of available-for-sale debt securities	64.5	45.1
Purchases of equity securities	(6.6)	(2.7)
Proceeds from sales of equity securities	2.1	4.3
Net cash used in investing activities	(162.6)	(265.5)
Cash flows from financing activities:
Shares repurchased and retired for tax withholding on vesting of restricted stock	(17.0)	(14.6)
Proceeds from issuance of common stock	0.1	32.1
Payment of dividends	(73.4)	(71.4)
Net cash used in financing activities	(90.3)	(53.9)
Effect of foreign currency exchange rates on cash, cash equivalents, and restricted cash	0.6	(3.6)
Net increase in cash, cash equivalents, and restricted cash	64.2	2.0
Cash, cash equivalents, and restricted cash at beginning of period	1,235.8	1,084.3
Cash, cash equivalents, and restricted cash at end of period	1,300.0	1,086.3
Non-cash investing and financing activities:
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 138.1	$ 58.8