Segment Information (Schedule of Other Assets) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 3	$ 50
Accounts receivable	667	1,401
Property, plant and equipment	11,258	10,903
Unamortized debt expense	39	44
Right-of-use lease assets	175	177
Long-term assets	480	359
TOTAL ASSETS	12,937	$ 12,926	$ 11,847
Other
Segment Reporting Information [Line Items]
Cash and cash equivalents	3		21
Accounts receivable	1		1
Prepayments	12		6
Property, plant and equipment	19		10
Unamortized debt expense	18		9
Right-of-use lease assets	55		63
Non-qualified retirement plan	2		2
Long-term assets	15		0
TOTAL ASSETS	$ 125		$ 112