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Inventories (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Inventory, Net [Abstract]
Separative work units borrowed in period, value	$ 9.4
Separative work units owed to others noncurrent	$ 31.8	$ 22.4

X

- Definition

Separative work units borrowed in period, value

+ References

No definition available.

+ Details

Name:	leu_SeparativeWorkUnitsBorrowedInPeriodValue
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Separative work units owed to others noncurrent

+ References

No definition available.

+ Details

Name:	leu_Separativeworkunitsowedtoothersnoncurrent
Namespace Prefix:	leu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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