Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets Held for Sale
Total current assets held for sale	$ 11	$ 14
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	308	197
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	251	122
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	126	157
Discontinued Operations, Held-for-sale | Commercial Renewables
Current Assets Held for Sale
Other	11	14
Total current assets held for sale	11	14
Noncurrent Assets Held for Sale
Cost	357	247
Accumulated depreciation and amortization	(57)	(57)
Net property, plant and equipment	300	190
Operating lease right-of-use assets, net	4	4
Other	4	3
Total other noncurrent assets held for sale	8	7
Total Assets Held for Sale	319	211
Current Liabilities Associated with Assets Held for Sale
Accounts payable	97	9
Taxes accrued	1	3
Current maturities of long-term debt	44	5
Unrealized losses on commodity hedges	74	68
Other	35	37
Total current liabilities associated with assets held for sale	251	122
Noncurrent Liabilities Associated with Assets Held for Sale
Long-Term debt	0	39
Operating lease liabilities	5	5
Asset retirement obligations	8	8
Unrealized losses on commodity hedges	102	94
Other	11	11
Total other noncurrent liabilities associated with assets held for sale	126	157
Total Liabilities Associated with Assets Held for Sale	$ 377	$ 279