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