(Accounts And Notes Receivable) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	$ 3,284	$ 3,232
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	3,064	3,027
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	$ 220	$ 205