CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities
Net income (loss)	$ 827.7	$ 188.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	68.2	49.0
Non-cash operating lease cost	14.3	13.3
Stock-based compensation (Note 6)	58.5	48.7
Change in fair value of contingent consideration liabilities (Note 4)	(107.1)	17.4
Deferred income taxes	16.2	(39.2)
Other	(13.2)	4.8
Changes in operating assets and liabilities:
Accounts and other receivables, net	(135.9)	21.5
Inventories	17.5	(99.2)
Accounts payable and accrued liabilities	84.8	(135.3)
Income taxes	23.2	9.1
Prepaid expenses and other current assets	0.4	0.0
Litigation settlement accrual	3.7	367.9
Other	(31.7)	(8.3)
Net cash provided by operating activities	826.6	438.4
Cash flows from investing activities
Capital expenditures	(175.3)	(190.5)
Purchases of held-to-maturity investments (Note 3)	(35.0)	(112.0)
Proceeds from held-to-maturity investments (Note 3)	50.0	212.2
Purchases of available-for-sale investments (Note 3)	(376.5)	(275.7)
Proceeds from available-for-sale investments (Note 3)	168.5	255.0
Payment for acquisition option (Note 3)	(5.7)	(10.0)
Issuances of notes receivable	(3.6)	(21.9)
Collections of notes receivable	10.0	0.0
Other	(11.6)	(2.0)
Net cash used in investing activities	(379.2)	(144.9)
Cash flows from financing activities
Proceeds from issuance of debt	14.0	10.6
Payments on debt and finance lease obligations	(15.6)	(11.8)
Purchases of treasury stock	(414.5)	(623.8)
Proceeds from stock plans	85.8	67.3
Other	(3.0)	(4.6)
Net cash used in financing activities	(333.3)	(562.3)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	11.6	(6.6)
Net increase (decrease) in cash, cash equivalents, and restricted cash	125.7	(275.4)
Cash, cash equivalents, and restricted cash at beginning of period	1,200.2	1,184.4
Cash, cash equivalents, and restricted cash at end of period	$ 1,325.9	$ 909.0

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of cash inflow from the sale or maturity of long-term held-to-maturity securities.

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The cash inflow associated with the amount received from the stock plan during the period.

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Amount of cash outflow for debt, mandatory redeemable security, and principal payment for finance lease obligation.

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Amount of noncash expense for share-based payment arrangement.

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