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Condensed Consolidated Statements of Comprehensive Income (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 42 $ 84
Net unrealized holding gains (losses) on available-for-sale investment securities:    
Unrealized holding gains (losses) arising during the period 1 7
Foreign currency translation gains (losses):    
Net foreign currency translation gains (losses) (41) 185
Income tax benefit (expense) 7 (60)
Total (34) 125
Total other comprehensive income (loss), net of tax (33) 132
Comprehensive income 9 216
Comprehensive loss attributable to noncontrolling interests   1
Comprehensive income attributable to NASDAQ OMX $ 9 $ 217