v2.4.0.8
Goodwill and Purchased Intangible Assets (Finite-Lived and Indefinite-Lived Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total finite-lived intangible assets, Gross Amount $ 1,119 $ 1,122
Accumulated Amortization (324) (307)
Total 795 815
Total indefinite-lived intangible assets, Net Amount 1,567 1,571
Total Intangible Assets, Gross Amount 2,686 2,693
Total Intangible Assets, Net Amount 2,362 2,386
Exchange and clearing registrations [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total indefinite-lived intangible assets, Net Amount 790 790
Trade Names [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total indefinite-lived intangible assets, Net Amount 756 756
Licenses [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total indefinite-lived intangible assets, Net Amount 51 51
Foreign currency translation adjustment [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total indefinite-lived intangible assets, Net Amount (30) (26)
Technology [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total finite-lived intangible assets, Gross Amount 37 39
Accumulated Amortization (12) (12)
Total 25 27
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years) 5 years 5 years
Customer relationships [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total finite-lived intangible assets, Gross Amount 1,075 1,075
Accumulated Amortization (309) (292)
Total 766 783
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years) 19 years 19 years
Other [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total finite-lived intangible assets, Gross Amount 5 5
Accumulated Amortization (3) (3)
Total 2 2
Total finite-lived intangible assets, Weighted-Average Useful Life (in Years) 8 years 8 years
Foreign currency translation adjustment [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Total finite-lived intangible assets, Gross Amount 2 3
Total $ 2 $ 3