CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 1,115.2	$ 624.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	67.4	56.1
Non-cash compensation expense	130.9	105.8
Other non-cash items, net	(115.7)	82.6
Deferred taxes	10.1	9.9
Changes in assets and liabilities:
Increase in accounts receivable, net	(58.3)	(169.0)
Increase in inventories	(252.8)	(70.8)
(Increase) decrease in prepaid expenses and other assets	(50.0)	70.1
(Decrease) increase in deferred revenue	(143.6)	73.9
Decrease in accounts payable, accrued expenses, and other liabilities	(34.7)	(85.2)
Total adjustments	(446.7)	73.4
Net cash provided by operating activities	668.5	698.0
Cash flows from investing activities:
Purchases of marketable and other securities	(1,360.0)	(714.3)
Sales or maturities of marketable and other securities	416.3	441.2
Capital expenditures	(115.3)	(170.1)
Net cash used in investing activities	(1,059.0)	(443.2)
Cash flows from financing activities:
Proceeds from issuance of Common Stock	95.0	811.4
Payments in connection with Common Stock tendered for employee tax obligations	(154.5)	(155.1)
Repurchases of Common Stock	(306.9)	(320.7)
Net cash (used in) provided by financing activities	(366.4)	335.6
Net (decrease) increase in cash, cash equivalents, and restricted cash	(756.9)	590.4
Cash, cash equivalents, and restricted cash at beginning of period	2,207.3	1,630.3
Cash, cash equivalents, and restricted cash at end of period	$ 1,450.4	$ 2,220.7