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Revenue from Contracts with Customers (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Contract Assets and Contract Liabilities | The following table summarizes our contract assets and contract liabilities (in millions):
| September 30, 2019 |  | December 31, 2018
Current contract assets | $ | 10.7 |  |  | $ | 4.0 |
Current contract liabilities (deferred revenue) | $ | 24.6 |  |  | $ | 56.9 |
Noncurrent contract liabilities (deferred revenue) | $ | 11.7 |  |  | $ | 20.5 |
Significant changes in contract assets and liabilities during the period are as follows (in millions):
| Contract Assets |  | Contract Liabilities
Balance as of December 31, 2018 | $ | 4.0 |  |  | $ | 77.4 |
Contract assets acquired and liabilities assumed in the Rowan Transaction | 8.4 |  |  | 5.3 |
Revenue recognized in advance of right to bill customer | 0.3 |  |  | — |
Increase due to cash received | — |  |  | 29.4 |
Decrease due to amortization of deferred revenue that was included in the beginning contract liability balance | — |  |  | (52.1) |
Decrease due to amortization of deferred revenue that was added during the period | — |  |  | (23.7) |
Decrease due to transfer to receivables during the period | (2.0) |  |  | — |
Balance as of September 30, 2019 | $ | 10.7 |  |  | $ | 36.3 |
Expected Future Amortization of Contract Liabilities | Expected future amortization of our contract liabilities and deferred costs recorded as of September 30, 2019 is set forth in the table below (in millions):
| Remaining 2019 |  | 2020 |  | 2021 |  | 2022 and Thereafter |  | Total
Amortization of contract liabilities | $ | 12.1 |  |  | $ | 12.9 |  |  | $ | 7.2 |  |  | $ | 4.1 |  |  | $ | 36.3 |
Amortization of deferred costs |  | $ | 12.1 |  |  | $ | 15.9 |  |  | $ | 3.3 |  |  | $ | 1.4 |  |  | $ | 32.7 |

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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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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130556-203045 + Details
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