Dispositions (Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Current Assets Held for Sale
Total current assets held for sale	$ 440	$ 356
Noncurrent Assets Held for Sale
Total other noncurrent assets held for sale	4,596	5,634
Current Liabilities Associated with Assets Held for Sale
Total current liabilities associated with assets held for sale	589	535
Noncurrent Liabilities Associated with Assets Held for Sale
Total other noncurrent liabilities associated with assets held for sale	1,634	1,927
Discontinued Operations, Held-for-sale | Commercial Renewables
Current Assets Held for Sale
Cash and cash equivalents	70	10
Receivables, net	107	107
Inventory	84	88
Other	179	151
Total current assets held for sale	440	356
Noncurrent Assets Held for Sale
Cost	5,387	6,444
Accumulated depreciation and amortization	(1,651)	(1,651)
Net property, plant and equipment	3,736	4,793
Operating lease right-of-use assets, net	144	140
Investments in equity method unconsolidated affiliates	504	522
Other	212	179
Total other noncurrent assets held for sale	860	841
Total Assets Held for Sale	5,036	5,990
Current Liabilities Associated with Assets Held for Sale
Accounts payable	124	122
Taxes accrued	22	17
Current maturities of long-term debt	268	276
Other	175	120
Total current liabilities associated with assets held for sale	589	535
Noncurrent Liabilities Associated with Assets Held for Sale
Long-Term debt	1,047	1,188
Operating lease liabilities	154	150
Asset retirement obligations	201	190
Other	232	399
Total other noncurrent liabilities associated with assets held for sale	1,634	1,927
Total Liabilities Associated with Assets Held for Sale	$ 2,223	$ 2,462