Investments	3 Months Ended
Mar. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Investments	6. Investments Trading Securities Trading securities, which are included in financial investments, at fair value in the Condensed Consolidated Balance Sheets, were $195 million as of March 31, 2013 and $201 million as of December 31, 2012. These securities are primarily comprised of Swedish government debt securities, of which $141 million as of March 31, 2013 and $134 million as of December 31, 2012, are restricted assets to meet regulatory capital requirements primarily for our clearing operations at NASDAQ OMX Nordic Clearing. Available-for-Sale Investment Security Investment in DFM Our available-for-sale investment security, which is included in financial investments, at fair value in the Condensed Consolidated Balance Sheets, represents our 1% investment in Dubai Financial Market PJSC, or DFM. The adjusted cost basis of this security was $18 million as of March 31, 2013 and December 31, 2012. The fair value of this investment was $23 million as of March 31, 2013 and $22 million as of December 31, 2012. The gross change between the adjusted cost basis and fair value as of March 31, 2013 of $5 million is reflected as an unrealized holding gain in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheets. Equity Method Investments The carrying amounts of our equity method investments totaled $13 million as of March 31, 2013 and December 31, 2012 and are included in other non-current assets in the Condensed Consolidated Balance Sheets. Our equity method investments consisted primarily of our equity interest in European Multilateral Clearing Facility N.V., or EMCF. In March 2013, we signed a memorandum of understanding to become equal shareholders in a new combined clearinghouse to be called EuroCCP. EuroCCP is expected to combine the risk management and customer service organization of EuroCCP with the technology and operations infrastructure of EMCF. Our ownership interest will be 25%. This transaction is expected to close before the end of the year. Income recognized from our equity interest in the earnings and losses of these equity method investments was immaterial for both the three months ended March 31, 2013 and 2012. In the first quarter of 2012, we recorded a non-cash, other-than-temporary impairment charge on our equity investment in EMCF of $12 million due to a decline in operations at EMCF during the three months ended March 31, 2012. This loss is included in asset impairment charges in the Condensed Consolidated Statements of Income for the three months ended March 31, 2012. Cost Method Investments The carrying amount of our cost method investment totaled $37 million as of March 31, 2013 and December 31, 2012 and is included in other non-current assets in the Condensed Consolidated Balance Sheets. Our cost method investment represents our 3.7% pro forma ownership interest in LCH Clearnet Group Limited, or LCH. We account for this investment as a cost method investment as we do not control and do not exercise significant influence over LCH and there is no readily determinable fair value of LCH’s shares since they are not publicly traded. In March 2013, LCH announced a capital raise in order to meet increased regulatory capital requirements. We have indicated our intent to participate in the capital raise and increase our ownership percentage to 5% for a combined total of 21 million Euro in cash. We expect to complete this transaction in the second quarter of 2013.

6. Investments

Trading Securities

Trading securities, which are included in financial investments, at fair value in the Condensed Consolidated Balance Sheets, were $195 million as of March 31, 2013 and $201 million as of December 31, 2012. These securities are primarily comprised of Swedish government debt securities, of which $141 million as of March 31, 2013 and $134 million as of December 31, 2012, are restricted assets to meet regulatory capital requirements primarily for our clearing operations at NASDAQ OMX Nordic Clearing.

Available-for-Sale Investment Security

Investment in DFM

Our available-for-sale investment security, which is included in financial investments, at fair value in the Condensed Consolidated Balance Sheets, represents our 1% investment in Dubai Financial Market PJSC, or DFM. The adjusted cost basis of this security was $18 million as of March 31, 2013 and December 31, 2012. The fair value of this investment was $23 million as of March 31, 2013 and $22 million as of December 31, 2012. The gross change between the adjusted cost basis and fair value as of March 31, 2013 of $5 million is reflected as an unrealized holding gain in accumulated other comprehensive loss in the Condensed Consolidated Balance Sheets.

Equity Method Investments

The carrying amounts of our equity method investments totaled $13 million as of March 31, 2013 and December 31, 2012 and are included in other non-current assets in the Condensed Consolidated Balance Sheets. Our equity method investments consisted primarily of our equity interest in European Multilateral Clearing Facility N.V., or EMCF. In March 2013, we signed a memorandum of understanding to become equal shareholders in a new combined clearinghouse to be called EuroCCP. EuroCCP is expected to combine the risk management and customer service organization of EuroCCP with the technology and operations infrastructure of EMCF. Our ownership interest will be 25%. This transaction is expected to close before the end of the year.

Income recognized from our equity interest in the earnings and losses of these equity method investments was immaterial for both the three months ended March 31, 2013 and 2012.

In the first quarter of 2012, we recorded a non-cash, other-than-temporary impairment charge on our equity investment in EMCF of $12 million due to a decline in operations at EMCF during the three months ended March 31, 2012. This loss is included in asset impairment charges in the Condensed Consolidated Statements of Income for the three months ended March 31, 2012.

Cost Method Investments

The carrying amount of our cost method investment totaled $37 million as of March 31, 2013 and December 31, 2012 and is included in other non-current assets in the Condensed Consolidated Balance Sheets. Our cost method investment represents our 3.7% pro forma ownership interest in LCH Clearnet Group Limited, or LCH. We account for this investment as a cost method investment as we do not control and do not exercise significant influence over LCH and there is no readily determinable fair value of LCH’s shares since they are not publicly traded. In March 2013, LCH announced a capital raise in order to meet increased regulatory capital requirements. We have indicated our intent to participate in the capital raise and increase our ownership percentage to 5% for a combined total of 21 million Euro in cash. We expect to complete this transaction in the second quarter of 2013.