Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income	$ 1,099.6	$ 699.8
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	191.9	122.4
Depreciation and amortization expense	53.5	38.8
Deferred income taxes	(158.3)	(113.4)
Losses (gains) on equity securities	27.0	(6.4)
Decrease in fair value of contingent consideration	(0.1)	(1.9)
Other non-cash items, net	(36.3)	21.7
Changes in operating assets and liabilities:
Accounts receivable, net	(251.6)	(90.5)
Inventories	(80.1)	(82.6)
Prepaid expenses and other assets	99.2	46.2
Accounts payable	0.1	35.7
Accrued expenses	194.1	140.7
Other liabilities	167.6	89.4
Net cash provided by operating activities	1,306.6	899.9
Cash flows from investing activities:
Purchases of available-for-sale debt securities	(2,598.5)	(1,816.6)
Sales and maturities of available-for-sale debt securities	710.5	50.0
Purchases of property and equipment	(68.4)	(42.1)
Net payments related to finite-lived intangible assets	(180.0)	0.0
Investment in equity securities	0.0	(24.9)
Net cash used in investing activities	(2,136.4)	(1,833.6)
Cash flows from financing activities:
Issuances of common stock under benefit plans	16.9	14.2
Repurchases of common stock	(131.2)	(132.8)
Payments in connection with common stock withheld for employee tax obligations	(233.5)	(166.6)
Payments on finance leases	(13.2)	(10.6)
Other financing activities	3.5	1.1
Net cash used in financing activities	(357.5)	(294.7)
Effect of changes in exchange rates on cash	(15.6)	12.0
Net decrease in cash, cash equivalents and restricted cash	(1,202.9)	(1,216.4)
Cash, cash equivalents and restricted cash—beginning of period	10,372.3	10,512.0
Cash, cash equivalents and restricted cash—end of period	9,169.4	9,295.6
Supplemental disclosure of cash flow information:
Cash paid for income taxes	34.8	120.3
Cash paid for interest	$ 10.0	$ 11.1