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Related Party Transactions (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) subsidiary	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) subsidiary	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction
General and administrative expense	$ 11	$ 10	$ 23	$ 20
RENOM
Related Party Transaction
Expenses from transactions with related party	15	14	30	27
Due to affiliate	9		9		$ 9
CEG
Related Party Transaction
Expenses from transactions with related party	5	4	8	7
Due to affiliate	$ 2		$ 2		$ 2
Number of wholly owned subsidiaries | subsidiary	2		2
General and administrative expense	$ 1	$ 1	$ 2	$ 2

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- Definition

Number of Wholly Owned Subsidiaries

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- Definition

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
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-Section S99
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 4
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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
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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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