XML 96 R81.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Clearing Operations (Schedule of Derivative Contracts Outstanding) (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 USD ($) contract TW | Mar. 31, 2016 contract TW
Clearing Operations [Line Items] |  |
Market value of derivative contracts | $ | $ 1,526 |
Total Number of Cleared Contracts | contract | 24,583,690 | 28,266,359
Total volume in cleared power, in Terawatt hours (TWh) | TW | 379 | 420
Commodity and seafood options, futures and forwards |  |
Clearing Operations [Line Items] |  |
Market value of derivative contracts | $ | $ 550 |
Total Number of Cleared Contracts | contract | 726,739 | 907,921
Fixed-income options and futures |  |
Clearing Operations [Line Items] |  |
Market value of derivative contracts | $ | $ 743 |
Total Number of Cleared Contracts | contract | 5,158,237 | 4,368,986
Stock options and futures |  |
Clearing Operations [Line Items] |  |
Market value of derivative contracts | $ | $ 132 |
Total Number of Cleared Contracts | contract | 7,383,538 | 8,303,721
Index options and futures |  |
Clearing Operations [Line Items] |  |
Market value of derivative contracts | $ | $ 101 |
Total Number of Cleared Contracts | contract | 11,315,176 | 14,685,731

X
- Definition Clearing Operations [Line Items] + References No definition available. + Details
Name: | ndaq_ClearingOperationsLineItems
Namespace Prefix: | ndaq_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Derivative contracts market value + References No definition available. + Details
Name: | ndaq_DerivativeContractsMarketValue
Namespace Prefix: | ndaq_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total volume in cleared power. + References No definition available. + Details
Name: | ndaq_TotalVolumeInClearedPower
Namespace Prefix: | ndaq_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ndaq_CommodityForwardsAndOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ndaq_FixedIncomeOptionsAndFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ndaq_StockOptionsAndFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ndaq_IndexOptionsAndFuturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |