Goodwill and Purchased Intangible Assets (Schedule of Changes in Goodwill) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Goodwill [Line Items]
Balance	$ 5,335
Goodwill acquired	831
Foreign currency translation adjustment	20
Balance	6,186
Market Services [Member]
Goodwill [Line Items]
Balance	2,955
Goodwill acquired	470
Foreign currency translation adjustment	8
Balance	3,433
Listing Services [Member]
Goodwill [Line Items]
Balance	136
Goodwill acquired
Foreign currency translation adjustment
Balance	136
Information Services [Member]
Goodwill [Line Items]
Balance	1,964
Goodwill acquired	49
Foreign currency translation adjustment	6
Balance	2,019
Technology Solutions [Member]
Goodwill [Line Items]
Balance	280
Goodwill acquired	312
Foreign currency translation adjustment	6
Balance	$ 598