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	$ 298	$ 203
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	63	48
Share-based compensation	19	17
Deferred income taxes	20	(1)
Extinguishment of debt	0	36
Net income from unconsolidated investees	(57)	(17)
Other reconciling items included in net income	3	(1)
Net change in operating assets and liabilities, net of effects of acquisitions:
Receivables, net	6	(174)
Other assets	(94)	69
Accounts payable and accrued expenses	12	28
Section 31 fees payable to SEC	(93)	29
Accrued personnel costs	(52)	(53)
Deferred revenue	255	204
Other liabilities	14	(8)
Net cash provided by operating activities	394	380
Cash flows from investing activities:
Purchases of securities	(60)	(92)
Proceeds from sales and redemptions of securities	28	114
Acquisition of businesses, net of cash and cash equivalents acquired	(2,430)	(157)
Purchases of property and equipment	(42)	(26)
Other investing activities	(1)	7
Net cash used in investing activities	(2,505)	(154)
Cash flows from financing activities:
Proceeds from (repayments of) commercial paper, net	435	(42)
Repayments of borrowings under our credit commitment and debt obligations	(100)	(671)
Payment of debt extinguishment cost	0	(36)
Proceeds from issuances of long-term debt, net of issuance costs and utilization of credit commitment	100	1,443
Repurchases of common stock	(162)	(122)
Dividends paid	(81)	(78)
Payments related to employee shares withheld for taxes	(39)	(28)
Other financing activities	(1)	2
Net cash provided by financing activities	152	468
Effect of exchange rate changes on cash and cash equivalents and restricted cash and cash equivalents	(11)	(12)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	(1,970)	682
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	2,782	362
Cash and cash equivalents and restricted cash and cash equivalents at end of period	812	1,044
Cash paid for:
Interest	19	33
Income taxes, net of refund	$ 45	$ 41