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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2019
Revenue Recognition |
Summary of revenue is disaggregation by geographical region |
|  | Three Months Ended |
|  | March 31, 2019 |
|  |  | U.S. Drilling |  |  | Canada Drilling |  |  | International Drilling |  |  | Drilling Solutions |  |  | Rig Technologies |  |  | Other |  |  | Total |
|  | (In thousands) |
Lower 48 |  | $ | 258,871 |  | $ | — |  | $ | — |  | $ | 44,052 |  | $ | 54,735 |  | $ | — |  | $ | 357,658 |
U.S. Offshore Gulf of Mexico |  |  | 41,481 |  |  | — |  |  | — |  |  | 4,244 |  |  | — |  |  | — |  |  | 45,725 |
Alaska |  |  | 19,857 |  |  | — |  |  | — |  |  | 1,728 |  |  | 303 |  |  | — |  |  | 21,888 |
Canada |  |  | — |  |  | 25,315 |  |  | — |  |  | 673 |  |  | 2,628 |  |  | — |  |  | 28,616 |
Middle East & Asia |  |  | — |  |  | — |  |  | 187,969 |  |  | 10,505 |  |  | 10,601 |  |  | — |  |  | 209,075 |
Latin America |  |  | — |  |  | — |  |  | 92,366 |  |  | 3,231 |  |  | 920 |  |  | — |  |  | 96,517 |
Europe, Africa & CIS |  |  | — |  |  | — |  |  | 56,921 |  |  | 989 |  |  | 2,566 |  |  | — |  |  | 60,476 |
Eliminations & other |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (20,315) |  |  | (20,315) |
Total |  | $ | 320,209 |  | $ | 25,315 |  | $ | 337,256 |  | $ | 65,422 |  | $ | 71,753 |  | $ | (20,315) |  | $ | 799,640 |
|  | Three Months Ended
|  | March 31, 2018
|  |  | U.S. Drilling |  |  | Canada Drilling |  |  | International Drilling |  |  | Drilling Solutions |  |  | Rig Technologies |  |  | Other |  |  | Total
|  | (In thousands)
Lower 48 |  | $ | 204,592 |  | $ | — |  | $ | — |  | $ | 44,273 |  | $ | 50,597 |  | $ | — |  | $ | 299,462
U.S. Offshore Gulf of Mexico |  |  | 20,991 |  |  | — |  |  | — |  |  | 3,299 |  |  | — |  |  | — |  |  | 24,290
Alaska |  |  | 15,419 |  |  | — |  |  | — |  |  | 566 |  |  | 136 |  |  | — |  |  | 16,121
Canada |  |  | — |  |  | 31,887 |  |  | — |  |  | 2,290 |  |  | 3,391 |  |  | — |  |  | 37,568
Middle East & Asia |  |  | — |  |  | — |  |  | 233,857 |  |  | 7,725 |  |  | 5,208 |  |  | — |  |  | 246,790
Latin America |  |  | — |  |  | — |  |  | 83,883 |  |  | 3,984 |  |  | 1,658 |  |  | — |  |  | 89,525
Europe, Africa & CIS |  |  | — |  |  | — |  |  | 51,105 |  |  | 511 |  |  | 3,679 |  |  | — |  |  | 55,295
Eliminations & other |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (34,857) |  |  | (34,857)
Total |  | $ | 241,002 |  | $ | 31,887 |  | $ | 368,845 |  | $ | 62,648 |  | $ | 64,669 |  | $ | (34,857) |  | $ | 734,194
Summary of contract assets, current and long-term contract liabilities | The opening and closing balances of our receivables, contract assets and current and long-term contract liabilities are as follows:
|  |  |  | Contract |  | Contract |  | Contract |  | Contract
|  | Contract |  | Assets |  | Assets |  | Liabilities |  | Liabilities
|  | Receivables |  | (Current) |  | (Long-term) |  | (Current) |  | (Long-term)
|  | (In millions)
As of December 31, 2018 |  | $ | 791.2 |  | $ | 55.8 |  | $ | 32.3 |  | $ | 116.7 |  | $ | 69.7
As of March 31, 2019 |  | $ | 776.5 |  | $ | 48.0 |  | $ | 27.7 |  | $ | 95.1 |  | $ | 66.7

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