v2.4.0.8

Subsequent Event (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2013
Subsequent Events [Abstract] |
Submitted Claims | $ 41.6

X
- Definition Total value of claims submitted associated with the system issues experienced with the Facebook IPO + References No definition available. + Details
Name: | ndaq_SubmittedClaims
Namespace Prefix: | ndaq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration