(Accounts And Notes Receivable) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	$ 3,232	$ 2,632
Trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	3,027	2,365
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts and notes receivable	$ 205	$ 267