Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 802	$ 227
Prepayments and other current assets	110	80
Plant, property, and equipment, net	25,280	25,072
Other non-current assets	318	357
Total Assets	33,901	33,517
Non-current portion of finance leases	61	62
Asset retirement obligations	777	771
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	24	28
Accounts receivable	5	3
Prepayments and other current assets	5	4
Plant, property, and equipment, net	1,055	1,064
Other non-current assets	3	3
Total Assets	1,092	1,102
Accounts payable	5	12
Non-current portion of finance leases	23	23
Asset retirement obligations	32	32
Total liabilities	$ 60	$ 67