v2.4.0.6
Clearing Operations (Schedule of Clearing Member Default Fund Contributions) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Clearing Operations [Line Items]  
Default fund contributions $ 229
Cash Contributions [Member]
 
Clearing Operations [Line Items]  
Default fund contributions 191 [1]
Non-Cash Contributions [Member]
 
Clearing Operations [Line Items]  
Default fund contributions $ 38
[1] As of March 31, 2013, in accordance with its investment policy, NASDAQ OMX Nordic Clearing has invested cash contributions of $118 million in reverse repurchase agreements and $73 million in highly rated government debt securities.