Accounts Receivable (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ (27)	$ (28)
Accounts Receivable from trade customers, net	1,393	1,651
Federal and state taxes	65	69
Other	143	81
Accounts receivable, net	1,601	1,801
Nonrelated Party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade customers	1,413	1,676
Related Party
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade customers	$ 7	$ 3