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Contract Assets and Contract Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Net Contract Assets (Liabilities) | Significant changes during the three and nine months ended September 30, 2019 and 2018 in the above contract asset and liability balances were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Revenue recognized that was included in deferred revenue at December 31, 2018 | $ | 46.0 |  |  |  |  | $ | 236.6 |  |  |
Revenue recognized that was included in deferred revenue at December 31, 2017 |  |  | $ | 64.6 |  |  |  |  | $ | 255.5 |
Net contract assets (liabilities) as of September 30, 2019 and December 31, 2018 are as follows:
| September 30, 2019 |  | December 31, 2018
Contract assets - current | $ | 38.3 |  |  | $ | 29.7 |
Contract assets - long-term(i) | 22.4 |  |  | 22.2 |
Deferred revenue - current | (236.0 | ) |  | (294.4 | )
Deferred revenue - long-term | (142.4 | ) |  | (157.2 | )
(i)Reported in other long-term assets on the company’s consolidated balance sheets

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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