Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 103	$ 42
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	35	27
Share-based compensation	14	9
Excess tax benefits related to share-based compensation	(3)	(2)
Provision for bad debts	4	1
Deferred income taxes	(10)	(23)
Noncash Merger Related Costs	18
Non-cash restructuring charges		1
Asset retirements and impairment charges		10
Other non-cash items included in net income		1
Net change in operating assets and liabilities, net of effects of acquisitions:
Receivables, net	(42)	14
Other assets	(17)	(7)
Accounts payable and accrued expenses	(1)	44
Section 31 fees payable to SEC	(8)	(26)
Accrued personnel costs	(58)	(52)
Deferred revenue	128	105
Other liabilities	20	5
Net cash provided by operating activities	183	149
Cash flows from investing activities:
Purchases of trading securities	(96)	(112)
Proceeds from sales and redemptions of trading securities	93	118
Purchase of equity and cost method investments	(5)
Purchases of property and equipment	(31)	(20)
Other investment activities	(7)
Net cash used in investing activities	(46)	(14)
Cash flows from financing activities:
Payments of debt obligations	(146)	(11)
Proceeds from debt obligations, net of debt issuance costs	25
Cash paid for repurchase of common stock		(10)
Cash dividends	(22)	(21)
Excess tax benefits related to share-based compensation	3	2
Proceeds From Stock Options Exercised	7	6
Payments related to employee shares withheld for taxes	(21)	(1)
Other financing activities	1
Net cash provided by (used in) financing activities	(153)	(35)
Effect of exchange rate changes on cash and cash equivalents	2	(6)
Net decrease in cash and cash equivalents	(14)	94
Cash and cash equivalents at beginning of period	398	497
Cash and cash equivalents at end of period	384	591
Cash paid for:
Interest	36	37
Income taxes, net of refund	11	11
Non-cash investing activities:
Transfer To Investments	$ 75