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Revenue (Tables) | 9 Months Ended
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Sep. 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 September 30, |  | Nine months ended September 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
United States |  | $ | 277.1 |  |  | $ | 286.6 |  |  | $ | 911.9 |  |  | $ | 834.2 |
Iceland |  | 160.9 |  |  | 195.2 |  |  | 489.3 |  |  | 572.1 |
Total |  | $ | 438.0 |  |  | $ | 481.8 |  |  | $ | 1,401.2 |  |  | $ | 1,406.3 |

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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=118956577&loc=SL49130545-203045 + Details
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- References No definition available. + Details
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