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	$ 813.8	$ 637.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13.8	15.6
Stock-based compensation	93.0	77.2
Deferred income taxes	(107.1)	(77.8)
Other	(12.1)	(7.8)
Changes in operating assets and liabilities:
Accounts receivable, net	(295.4)	(65.5)
Inventories	(122.7)	(80.0)
Other assets	(113.7)	38.1
Accounts payable	6.7	(207.2)
Deferred revenue	297.4	157.0
Income taxes, net	241.3	157.5
Other liabilities	(173.3)	(131.0)
Net cash provided by operating activities	641.7	513.8
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from maturities of marketable securities	799.2	590.4
Proceeds from sale of marketable securities	8.8	36.8
Purchases of marketable securities	(1,545.5)	(912.4)
Purchases of property and equipment	(28.4)	(9.4)
Other	0.0	(1.0)
Net cash used in investing activities	(765.9)	(295.6)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock under equity plans	28.1	25.1
Tax withholding paid on behalf of employees for net share settlement	(34.8)	(25.5)
Repurchases of common stock	(787.1)	(62.7)
Net cash used in financing activities	(793.8)	(63.1)
Effect of exchange rate changes	0.7	(1.6)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(917.3)	153.5
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —Beginning of period	2,763.8	1,939.5
CASH, CASH EQUIVALENTS AND RESTRICTED CASH —End of period	$ 1,846.5	$ 2,093.0