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Contract assets and contract liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Net Contract Assets (Liabilities) | Net contract assets (liabilities) as of December 31, 2019 and 2018 are as follows:
As of December 31, | 2019 |  |  | 2018 |
Contract assets - current | $ | 53.0 |  |  | $ | 29.7 |
Contract assets - long-term(i) | 21.6 |  |  | 22.2 |
Deferred revenue - current | (288.6 | ) |  | (294.4 | )
Deferred revenue - long-term | (147.4 | ) |  | (157.2 | )
(i)Reported in other long-term assets on the company’s consolidated balance sheets Significant changes during the years ended December 31, 2019 and 2018 in the above contract asset and liability balances were as follows:
Year ended December 31, | 2019 |  |  | 2018 |
Revenue recognized that was included in deferred revenue at the beginning of the period | $ | 287.9 |  |  | $ | 307.1 |

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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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