Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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No definition available.

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Asset Impairments (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended
Asset Impairments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset Impairments
Impairment losses on investments						$ 102	$ 0	$ 0
Impairment losses						$ 26	206	$ 544
Goodwill impairment losses			$ 130				130
Gladstone
Asset Impairments
Impairment losses on investments	$ 102
East
Asset Impairments
Impairment losses	4	$ 43	$ 20	$ 16			13
Goodwill impairment losses							130
East \| Joliet facility
Asset Impairments
Impairment losses				213
East \| PJM Coal Generating Assets
Asset Impairments
Impairment losses					$ 271
Goodwill impairment losses					$ 35
West/Services/Other
Asset Impairments
Impairment losses	20			$ 9
Texas
Asset Impairments
Impairment losses	$ 2
Goodwill impairment losses							$ 0