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Revenue and Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue from External Customers by Geographic Areas

The following table presents revenue from separative work units (“SWU”) and uranium sales disaggregated by geographical region based on the billing addresses of customers (in millions):

			Three Months Ended June 30,												Six Months Ended June 30,
			2021						2020						2021						2020
United States			$	45.2					$	43.1					$	54.8					$	50.4
Foreign			—						20.3						28.5						43.7
Revenue - SWU and uranium			$	45.2					$	63.4					$	83.3					$	94.1

Contract with Customer, Asset and Liability

						June 30, 2021						December 31, 2020						Year-To-Date Change
Accrued loss on HALEU Contract:
Current - Accounts payable and accrued liabilities						$	3.1					$	7.0					$	(3.9)
Noncurrent - Other long-term liabilities						$	—					$	0.7					$	(0.7)
Deferred revenue - current						$	259.1					$	281.7					$	(22.6)
Advances from customers - current						$	16.9					$	1.5					$	15.4
Advances from customers - noncurrent						$	45.1					$	45.2					$	(0.1)

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- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

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- References

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- Definition

Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph a
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599

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