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Acquisitions and Dispositions - Held For Sale (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets - held-for-sale	$ 86		$ 86		$ 0
Non-current assets - held-for-sale	1,153		1,153		5
Current liabilities - held-for-sale	44		44		4
Non-current liabilities - held-for-sale	926		926		$ 31
Income before income taxes	6	$ 11	16	$ 0
Held-for-sale | Texas
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory	68		68
Prepayments and other current assets	18		18
Current assets - held-for-sale	86		86
Property, plant and equipment, net	248		248
Intangible assets, net	12		12
Nuclear decommissioning trust fund	893		893
Non-current assets - held-for-sale	1,153		1,153
Total assets held-for-sale	1,239		1,239
Current liabilities - held-for-sale	44		44
Nuclear decommissioning reserve	341		341
Nuclear decommissioning trust liability	518		518
Other non-current liabilities	67		67
Non-current liabilities - held-for-sale	926		926
Total liabilities held-for-sale	970		970
Held-for-sale | STP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income before income taxes	$ 188	$ 175	$ 195	$ 331

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