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Deferred Revenue (Changes in Deferred Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Movement in Deferred Revenue [Roll Forward] |  |
Beginning Balance | $ 333 | $ 327
Additions | 361 | 384
Amortization | (211) | (218)
Translation adjustment | 3 | (1)
Ending Balance | 486 | 492
Initial Listing Revenues |  |
Movement in Deferred Revenue [Roll Forward] |  |
Beginning Balance | 54 | 59
Additions | 4 | 1
Amortization | (5) | (4)
Translation adjustment | 0 | 0
Ending Balance | 53 | 56
Listing of Additional Shares Revenues |  |
Movement in Deferred Revenue [Roll Forward] |  |
Beginning Balance | 37 | 53
Additions | 5 | 2
Amortization | (9) | (7)
Translation adjustment | 0 | 0
Ending Balance | 33 | 48
Annual Renewal and Other Revenues |  |
Movement in Deferred Revenue [Roll Forward] |  |
Beginning Balance | 57 | 28
Additions | 306 | 314
Amortization | (142) | (143)
Translation adjustment | 0 | 1
Ending Balance | 221 | 200
Market Technology Revenues |  |
Movement in Deferred Revenue [Roll Forward] |  |
Beginning Balance | 185 | 187
Additions | 46 | 67
Amortization | (55) | (64)
Translation adjustment | 3 | (2)
Ending Balance | $ 179 | $ 188

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- Definition Deferred Revenue Foreign Currency Translation Adjustment + References No definition available. + Details
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- Definition Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.3) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition Amount of revenue recognized that was previously reported as deferred or unearned revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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