XML 62 R38.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Inventories (Narrative) (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Inventory, Net [Abstract] |  |
Inventories provided by customers and suppliers | $ 242.0 | $ 437.0
Decline in Uranium Quantities Provided by Customers and Suppliers | 28.00% |
Decline in Uranium Spot Price Indicator | 23.00% |
Inventory Adjustments | $ 0.7 |

X
- Definition Decline in Uranium Quantities Provided by Customers and Suppliers + References No definition available. + Details
Name: | leu_DeclineinUraniumQuantitiesProvidedbyCustomersandSuppliers
Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Decline in Uranium Spot Price Indicator + References No definition available. + Details
Name: | leu_DeclineinUraniumSpotPriceIndicator
Namespace Prefix: | leu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Uranium held by USEC to which title was held by customers and suppliers and for which no assets or liabilities were recorded on the balance sheet + References No definition available. + Details
Name: | leu_InventoriesProvidedByCustomersAndSuppliers
Namespace Prefix: | leu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66092785&loc=d3e4492-108314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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