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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2019
Revenue Recognition and Deferred Revenue [Abstract] |
Disaggregation of revenue | We disaggregate our revenue by geographical region as follows:
Net Sales |  | Three months ended June 30, |  | Six months ended June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
United States |  | $ | 309.5 |  |  | $ | 279.4 |  |  | $ | 634.8 |  |  | $ | 547.6 |
Iceland |  | 163.6 |  |  | 190.6 |  |  | 328.4 |  |  | 376.9 |
Total |  | $ | 473.1 |  |  | $ | 470.0 |  |  | $ | 963.2 |  |  | $ | 924.5 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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- References No definition available. + Details
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