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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue [abstract] |
Revenue - Disaggregation |
| Uranium | Fuel services | Other | Total
Customer geographical region |  |  |  |  |  |  |  |
Americas | $ | 569,535 | $ | 206,226 | $ | 59,300 | $ | 835,061
Europe |  | 288,134 |  | 79,629 |  | 3,587 |  | 371,350
Asia |  | 556,140 |  | 84,422 |  | 15,952 |  | 656,514
| $ | 1,413,809 | $ | 370,277 | $ | 78,839 | $ | 1,862,925
Contract type |  |  |  |  |  |  |  |
Fixed-price | $ | 349,021 | $ | 305,383 | $ | 69,703 | $ | 724,107
Market-related |  | 1,064,788 |  | 64,894 |  | 9,136 |  | 1,138,818
| $ | 1,413,809 | $ | 370,277 | $ | 78,839 | $ | 1,862,925
| Uranium | Fuel services | Other | Total
Customer geographical region |  |  |  |  |  |  |  |
Americas | $ | 695,678 | $ | 191,791 | $ | 69,012 | $ | 956,481
Europe |  | 275,096 |  | 50,000 |  | 10,693 |  | 335,789
Asia |  | 713,282 |  | 72,198 |  | 13,911 |  | 799,391
| $ | 1,684,056 | $ | 313,989 | $ | 93,616 | $ | 2,091,661
Contract type |  |  |  |  |  |  |  |
Fixed-price | $ | 577,143 | $ | 293,400 | $ | 83,706 | $ | 954,249
Market-related |  | 1,106,913 |  | 20,589 |  | 9,910 |  | 1,137,412
| $ | 1,684,056 | $ | 313,989 | $ | 93,616 | $ | 2,091,661
Revenue - Contract liabilities |
|  | 2019 |  | 2018
Beginning of year | $ | 30,727 | $ | 29,148
Additions |  | 9,783 |  | 25,695
Recognized in revenue |  | (23,067) |  | (24,025)
Effect of movements in exchange rates |  | (25) |  | (91)
End of year | $ | 17,418 | $ | 30,727
Revenue - Remaining performance obligations |
|  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | Thereafter |  | Total
Uranium | $ | 271,642 | $ | 183,422 | $ | 145,920 | $ | 169,234 | $ | 166,015 | $ | 532,429 | $ | 1,468,662
Fuel services |  | 274,755 |  | 265,126 |  | 212,562 |  | 150,266 |  | 150,773 |  | 593,612 |  | 1,647,094
Other |  | 4,030 |  | 4,212 |  | - |  | - |  | - |  | - |  | 8,242
Total | $ | 550,427 | $ | 452,760 | $ | 358,482 | $ | 319,500 | $ | 316,788 | $ | 1,126,041 | $ | 3,123,998

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