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v3.19.1

Segment Information (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting [Abstract] |  |
Revenue from top 10 customers | 85.00% | 97.00%
Revenue from top 3 customers | 52.00% | 53.00%
Revenue from first customer over 10 percent | 21.00% | 16.00%
Revenue from second customer over 10 percent | 18.00% | 14.00%
Revenue from third customer over 10 percent | 13.00% | 12.00%
Revenue from fourth customer over 10 percent |  | 11.00%

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- Definition Revenue from first customer over 10 percent + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | num:percentItemType
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Period Type: | duration

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- Definition Revenue from fourth customer over 10 percent + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Revenue from second customer over 10 percent + References No definition available. + Details
Name: | leu_Revenuefromsecondcustomerover10percent
Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from third customer over 10 percent + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from top 10 customers + References No definition available. + Details
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Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from top 3 customers + References No definition available. + Details
Name: | leu_Revenuefromtop3customers
Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration