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Deferred Revenue (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Changes in Deferred Revenue | The changes in our deferred revenue during the nine months ended September 30, 2018 are reflected in the following table:
| Initial Listing Revenues |  | Annual Listings Revenues |  | Market Technology Revenues |  | Corporate Solutions and Other Revenues(2) |  | Information Services Revenues |  | Other(3) |  | Total
| (in millions)
Balance at December 31, 2017 | $ | 64 |  |  | $ | 3 |  |  | $ | 109 |  |  | $ | 37 |  |  | $ | 40 |  |  | $ | 34 |  |  | $ | 287 |
Additions | 30 |  |  | 231 |  |  | 118 |  |  | 189 |  |  | 128 |  |  | 18 |  |  | 714 |
Revenue recognized | (27 | ) |  | (173 | ) |  | (131 | ) |  | (191 | ) |  | (91 | ) |  | (29 | ) |  | (642 | )
Reclassification of deferred revenue(1) | — |  |  | — |  |  | (11 | ) |  | 11 |  |  | — |  |  | — |  |  | — |
Translation adjustment | (2 | ) |  | (1 | ) |  | (8 | ) |  | — |  |  | 1 |  |  | (1 | ) |  | (11 | )
Balance at September 30, 2018 | $ | 65 |  |  | $ | 60 |  |  | $ | 77 |  |  | $ | 46 |  |  | $ | 78 |  |  | $ | 22 |  |  | $ | 348 |
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(1) | Concurrent with the realignment of our BWise corporate enterprise risk management solutions from our Market Technology segment to our Corporate Services segment, deferred revenue was reassigned to the Corporate Services segment.
(2) | Other revenues include the revenues from the Public Relations Solutions and Digital Media Services businesses through the date of sale (April 2018). See “2018 Divestiture,” of Note 4, “Acquisitions and Divestiture,” to the condensed consolidated financial statements for further discussion.
(3) | The balance as of September 30, 2018 and December 31, 2017 primarily includes deferred revenue from listing of additional shares fees which are included in our Listing Services segment. The activity during the period primarily pertains to our Trade Management Services and FICC businesses, which are included in our Market Services segment, for contracts paid monthly or quarterly in advance of the service.
Estimated Deferred Revenue | As of September 30, 2018, we estimate that our deferred revenue will be recognized in the following years:
| Initial Listing Revenues |  | Annual Listings Revenues |  | Market Technology Revenues |  | Corporate Solutions Revenues |  | Information Services Revenues |  | Other(2) |  | Total
| (in millions)
Fiscal year ended: |  |  |  |  |  |  |  |  |  |  |  |  |
2018(1) | $ | 6 |  |  | $ | 60 |  |  | $ | 18 |  |  | $ | 24 |  |  | $ | 35 |  |  | $ | 3 |  |  | $ | 146 |
2019 | 23 |  |  | — |  |  | 34 |  |  | 21 |  |  | 43 |  |  | 10 |  |  | 131 |
2020 | 15 |  |  | — |  |  | 18 |  |  | 1 |  |  | — |  |  | 6 |  |  | 40 |
2021 | 10 |  |  | — |  |  | 7 |  |  | — |  |  | — |  |  | 3 |  |  | 20 |
2022 | 7 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 7 |
2023 and thereafter | 4 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4 |
Total | $ | 65 |  |  | $ | 60 |  |  | $ | 77 |  |  | $ | 46 |  |  | $ | 78 |  |  | $ | 22 |  |  | $ | 348 |
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(1) | Represents deferred revenue that is anticipated to be recognized over the remaining three months of 2018.
(2) | Other primarily includes revenues from listing of additional shares fees which are included in our Listing Services business.

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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