JOINT VENTURE (Details)		9 Months Ended
May 13, 2021 USD ($) item	Dec. 31, 2021 USD ($)
JOINT VENTURE
Interest in joint venture (as a percent)		50.00%
Talen
JOINT VENTURE
Maximum operating capacity (MW) \| item	300
Interest in joint venture (as a percent)	50.00%
Capitalized interest costs		$ 57,000
Nautilus
JOINT VENTURE
Join Venture contribution	$ 156,000,000.0
Nautilus \| Talen
JOINT VENTURE
Join Venture contribution	$ 156,000,000.0

Amount of interest capitalized, including amount of allowance for funds used during construction.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501662&loc=d3e56162-110433

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685

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The amount each member of the joint venture is to contribution per agreement.

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- Definition

The maximum operating capacity of a joint venture.

+ References

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