XML 44 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9

Inventories (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Inventory [Line Items]
Separative work units inventory	$ 292.4leu_SeparativeWorkUnitsInventory	$ 330.6leu_SeparativeWorkUnitsInventory
Uranium inventory	126.6leu_UraniumInventory	131.4leu_UraniumInventory
Materials and supplies	0.2us-gaap_OtherInventorySupplies	0.2us-gaap_OtherInventorySupplies
Inventories	419.2us-gaap_InventoryNet	462.2us-gaap_InventoryNet
Separative work units owed to customers and suppliers	110.9leu_SeparativeWorkUnitsOwedToCustomersAndSuppliers	76.6leu_SeparativeWorkUnitsOwedToCustomersAndSuppliers
Uranium owed to customers and suppliers	129.1leu_UraniumOwedToCustomersAndSuppliers	82.3leu_UraniumOwedToCustomersAndSuppliers
Inventories owed to customers and suppliers	240.0leu_InventoriesOwedToCustomersAndSuppliers	158.9leu_InventoriesOwedToCustomersAndSuppliers
Separative work units net of liability	181.5leu_SeparativeWorkUnitsNetOfLiability	254.0leu_SeparativeWorkUnitsNetOfLiability
Uranium inventory net of liability	(2.5)leu_UraniumInventoryNetOfLiability	49.1leu_UraniumInventoryNetOfLiability
Inventories, net	$ 179.2leu_InventoryNetOfLiability	$ 303.3leu_InventoryNetOfLiability

X

- Definition

Cost of SWU and uranium inventories owed related to the transfer of title from USEC to customer at fabricator whereby fabricator has elected to order less material from USEC than is required. Amounts owed are satisfied when fabricator orders future bulk deliveries.

+ References

No definition available.

+ Details

Name:	leu_InventoriesOwedToCustomersAndSuppliers
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Inventory net of Liability

+ References

No definition available.

+ Details

Name:	leu_InventoryNetOfLiability
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Carrying amount as of the balance sheet date of separative work unit ("SWU") inventory. SWU is held as the SWU component of low enriched uranium. A SWU is the standard measure of uranium enrichment using a standard formula derived from the physics of enrichment. SWU costs are based on production costs and purchase costs. SWU inventory is valued at the lower of cost or market.

+ References

No definition available.

+ Details

Name:	leu_SeparativeWorkUnitsInventory
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Separative work units inventory net of liability

+ References

No definition available.

+ Details

Name:	leu_SeparativeWorkUnitsNetOfLiability
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Separative work units owed to customers and suppliers

+ References

No definition available.

+ Details

Name:	leu_SeparativeWorkUnitsOwedToCustomersAndSuppliers
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Carrying amount as of the balance sheet date of uranium inventory. Uranium is held in the form of natural uranium and as the uranium component of low enriched uranium. Uranium inventory is valued at the lower of cost or market.

+ References

No definition available.

+ Details

Name:	leu_UraniumInventory
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Uranium inventory net of liability

+ References

No definition available.

+ Details

Name:	leu_UraniumInventoryNetOfLiability
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Uranium owed to customers and suppliers

+ References

No definition available.

+ Details

Name:	leu_UraniumOwedToCustomersAndSuppliers
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_InventoryLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: 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(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

+ Details

Name:	us-gaap_InventoryNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph a

-Article 5



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Inventory

-URI http://asc.fasb.org/extlink&oid=6516093



Reference 3: 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(a)(5))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_OtherInventorySupplies
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant