Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 1,580	$ 1,507
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	494	473
Stock-based compensation	105	100
Deferred taxes	67	(52)
Other	(48)	(34)
Changes in assets and liabilities:
Customer accounts receivable	(228)	(97)
Other current and non-current assets	(43)	22
Section 31 fees payable	(85)	(70)
Deferred revenue	120	114
Other current and non-current liabilities	(147)	(81)
Total adjustments	235	375
Net cash provided by operating activities	1,815	1,882
Investing activities:
Capital expenditures	(114)	(87)
Capitalized software development costs	(154)	(116)
Cash paid for acquisitions, net of cash acquired	(9,439)	(352)
Return of capital from equity method investment	0	44
Proceeds from investments, net	5	(1)
Net cash used in investing activities	(9,702)	(512)
Financing activities:
Proceeds from debt facilities, net	9,606	11
Repayments of debt facilities	(1,258)	0
Proceeds from/(redemption of) commercial paper, net	1,149	367
Repurchases of common stock	(1,247)	(1,120)
Dividends to stockholders	(500)	(467)
Payments relating to treasury shares received for restricted stock tax payments and stock option exercises	(72)	(64)
Other	31	22
Net cash provided by (used in) financing activities	7,709	(1,251)
Effect of exchange rate changes on cash, cash equivalents and restricted cash and cash equivalents	1	(2)
Net increase (decrease) in cash, cash equivalents, and restricted cash and cash equivalents	(177)	117
Cash, cash equivalents, and restricted cash and cash equivalents, beginning of period	2,188	1,872
Cash, cash equivalents, and restricted cash and cash equivalents, end of period	2,011	1,989
Supplemental cash flow disclosure:
Common stock issued for acquisition	1,895	0
Cash paid for income taxes	558	457
Cash paid for interest	$ 209	$ 214