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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of revenue by timing | The following table represents a disaggregation of revenue by timing of revenue along with the reportable segment for each category:
| Three Months Ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
| D&S East |  | D&S West |  | E&C Cryogenics |  | E&C FinFans |  | Intersegment Eliminations |  | Consolidated
Point in time | $ | 77.7 |  |  | $ | 81.0 |  |  | $ | 4.2 |  |  | $ | 17.2 |  |  | $ | (6.9) |  |  | $ | 173.2 |
Over time | 7.4 |  |  | 10.1 |  |  | 60.6 |  |  | 23.3 |  |  | (1.4) |  |  | 100.0 |
Total | $ | 85.1 |  |  | $ | 91.1 |  |  | $ | 64.8 |  |  | $ | 40.5 |  |  | $ | (8.3) |  |  | $ | 273.2 |
| Three Months Ended September 30, 2019 |  |  |  |  |  |  |  |  |  |
| D&S East |  | D&S West |  | E&C Cryogenics |  | E&C FinFans |  | Intersegment Eliminations |  | Consolidated
Point in time | $ | 64.1 |  |  | $ | 79.6 |  |  | $ | 10.8 |  |  | $ | 19.5 |  |  | $ | (3.2) |  |  | $ | 170.8 |
Over time | 6.3 |  |  | 13.7 |  |  | 38.1 |  |  | 109.1 |  |  | — |  |  | 167.2 |
Total | $ | 70.4 |  |  | $ | 93.3 |  |  | $ | 48.9 |  |  | $ | 128.6 |  |  | $ | (3.2) |  |  | $ | 338.0 |
| Nine Months Ended September 30, 2020 |  |  |  |  |  |  |  |  |  |
| D&S East |  | D&S West |  | E&C Cryogenics |  | E&C FinFans |  | Intersegment Eliminations |  | Consolidated
Point in time | $ | 205.8 |  |  | $ | 234.7 |  |  | $ | 4.2 |  |  | $ | 59.3 |  |  | $ | (11.0) |  |  | $ | 493.0 |
Over time | 29.0 |  |  | 34.8 |  |  | 186.5 |  |  | 126.0 |  |  | (4.6) |  |  | 371.7 |
Total | $ | 234.8 |  |  | $ | 269.5 |  |  | $ | 190.7 |  |  | $ | 185.3 |  |  | $ | (15.6) |  |  | $ | 864.7 |
| Nine Months Ended September 30, 2019 |  |  |  |  |  |  |  |  |  |
| D&S East |  | D&S West |  | E&C Cryogenics |  | E&C FinFans |  | Intersegment Eliminations |  | Consolidated
Point in time | $ | 203.0 |  |  | $ | 245.7 |  |  | $ | 10.8 |  |  | $ | 58.6 |  |  | $ | (6.0) |  |  | $ | 512.1 |
Over time | 13.8 |  |  | 34.3 |  |  | 120.5 |  |  | 213.4 |  |  | — |  |  | 382.0 |
Total | $ | 216.8 |  |  | $ | 280.0 |  |  | $ | 131.3 |  |  | $ | 272.0 |  |  | $ | (6.0) |  |  | $ | 894.1 |
Changes in contract assets and contract liabilities balances | The following table represents changes in our contract assets and contract liabilities balances:
| September 30, 2020 |  | December 31, 2019 |  | Year-to-date Change ($) |  | Year-to-date Change (%)
Contract assets |  |  |  |  |  |  |
Accounts receivable, net of allowances | $ | 163.6 |  |  | $ | 191.6 |  |  | $ | (28.0) |  |  | (14.6) | %
Unbilled contract revenue | 97.1 |  |  | 86.1 |  |  | 11.0 |  |  | 12.8 | %
Contract liabilities |  |  |  |  |  |  |
Customer advances and billings in excess of contract revenue | $ | 124.7 |  |  | $ | 127.7 |  |  | $ | (3.0) |  |  | (2.3) | %

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + 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=121604090&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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