Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 103	$ 227
Prepayments and other current assets	103	80
Plant, property, and equipment, net	27,461	25,072
Other non-current assets	384	357
Total Assets	35,920	33,517
Non-current portion of finance leases	112	62
Asset retirement obligations	728	771
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	18	28
Accounts receivable	4	3
Prepayments and other current assets	3	4
Plant, property, and equipment, net	1,024	1,064
Other non-current assets	3	3
Total Assets	1,052	1,102
Accounts payable	8	12
Non-current portion of finance leases	23	23
Asset retirement obligations	33	32
Total liabilities	$ 64	$ 67