Additional Working Capital Information (Schedule Of Notes, Accounts Receivable And Payable, Loans Payable, Accrued Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Notes and Accounts Receivable [Abstract]
Trade notes and accounts receivable, less reserves of $34 million and $61 million	$ 21,100	$ 19,638
Other notes and accounts receivable, less reserves of $371 million and $339 million	5,866	5,063
Total notes and accounts receivable	26,966	24,701
Trade notes and accounts receivable, reserves	34	61
Other notes and accounts receivable, reserves	371	339
Notes And Loans Payable [Abstract]
Bank loans	316	325
Commercial paper	18,561	12,863
Long-term debt due within one year	1,701	4,070
Total notes and loans payable	20,578	17,258
Accounts Payable And Accrued Liabilities Current [Abstract]
Trade payables	24,694	21,063
Payables to equity companies	6,825	6,863
Accrued taxes other than income taxes	3,301	3,280
Other accounts payable and accrued liabilities	7,011	6,062
Total accounts payable and accrued liabilities	$ 41,831	$ 37,268

No definition available.

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- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.