Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 227.0	$ 176.6
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	138.7	147.1
Depreciation, amortization, and accretion	158.0	155.5
Operating lease assets expense	31.5	32.0
Loss on extinguishment of debt	0.0	15.3
Other	2.6	3.6
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	126.1	125.2
Prepaid expenses and other assets	(43.8)	(33.8)
Accounts payable	50.2	19.1
Accrued compensation	(31.6)	(45.4)
Income taxes payable	(60.1)	(8.7)
Other accrued liabilities	(23.8)	(49.5)
Deferred revenue	(88.6)	(103.8)
Net cash provided by operating activities	486.2	433.2
Cash flows from investing activities:
Purchases of property and equipment	(67.9)	(83.5)
Purchases of available-for-sale debt securities	(831.9)	(2,789.6)
Proceeds from sales of available-for-sale debt securities	198.7	1,035.0
Proceeds from maturities and redemptions of available-for-sale debt securities	746.6	1,410.1
Purchases of equity securities	(9.4)	(10.2)
Proceeds from sales of equity securities	4.6	5.0
Proceeds from Pulse note receivable	50.0	0.0
Payments for business acquisitions, net of cash and cash equivalents acquired	0.0	(270.9)
Other	(4.7)	0.0
Net cash provided by (used in) investing activities	86.0	(704.1)
Cash flows from financing activities:
Repurchase and retirement of common stock	(305.7)	(354.9)
Proceeds from issuance of common stock	54.5	55.4
Payment of dividends	(198.0)	(196.4)
Payment of debt	0.0	(950.0)
Issuance of debt, net	0.0	495.2
Payment for debt extinguishment costs	0.0	(14.6)
Other	4.8	0.0
Net cash used in financing activities	(444.4)	(965.3)
Effect of foreign currency exchange rates on cash, cash equivalents, and restricted cash	(2.5)	(3.6)
Net increase (decrease) in cash, cash equivalents, and restricted cash	125.3	(1,239.8)
Cash, cash equivalents, and restricted cash at beginning of period	1,276.5	2,505.8
Cash, cash equivalents, and restricted cash at end of period	$ 1,401.8	$ 1,266.0