v2.4.0.6
Deferred Revenue (Estimated Deferred Revenue) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Deferred Revenue Arrangement [Line Items]        
2013 $ 231 [1]      
2014 70      
2015 46      
2016 33      
2017 14      
2018 and thereafter 4      
Deferred revenue estimated revenue to be recognized 398 295 410 278
Initial Listing Revenues [Member]
        
Deferred Revenue Arrangement [Line Items]        
2013 8 [1]      
2014 9      
2015 8      
2016 5      
2017 3      
2018 and thereafter 1      
Deferred revenue estimated revenue to be recognized 34 36 38 39
Listing of Additional Shares Revenues [Member]
        
Deferred Revenue Arrangement [Line Items]        
2013 28 [1]      
2014 26      
2015 15      
2016 7      
Deferred revenue estimated revenue to be recognized 76 78 78 86
Annual Renewal and Other Revenues [Member]
        
Deferred Revenue Arrangement [Line Items]        
2013 137 [1]      
2014 1      
Deferred revenue estimated revenue to be recognized 138 32 138 25
Technology Solutions [Member]
        
Deferred Revenue Arrangement [Line Items]        
2013 58 [1],[2]      
2014 34 [2]      
2015 23 [2]      
2016 21 [2]      
2017 11 [2]      
2018 and thereafter 3 [2]      
Deferred revenue estimated revenue to be recognized $ 150 [2],[3] $ 149 [3] $ 156 [3] $ 128 [3]
[1] Represents deferred revenue that is anticipated to be recognized over the remaining nine months of 2013.
[2] The timing of recognition of our deferred Market Technology revenues is dependent upon the completion of customization and any significant modifications made pursuant to existing contracts. As such, as it relates to these revenues, the timing represents our best estimate.
[3] Market Technology deferred revenues include revenues from delivered client contracts in the support phase charged during the period. Under contract accounting, where customization and significant modifications to the software are made to meet the needs of our customers, total revenues, as well as costs incurred, are deferred until significant modifications are completed and delivered. Once delivered, deferred revenue and the related deferred costs are recognized over the post contract support period. We have included the deferral of costs in other current assets and other non-current assets in the Condensed Consolidated Balance Sheets. The amortization of Market Technology deferred revenue primarily includes revenues earned from client contracts recognized during the period.