Liabilities, Commitments And Contingencies (Schedule Of Accrued Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Accrued compensation and employee benefit costs	$ 7,121.0	$ 5,582.0
737 MAX Customer Concessions & Other Considerations Liability	5,537.0	7,389.0
Deferred Prosecution Agreement Liability	744.0
Environmental	565.0	570.0	$ 555.0
Product warranties	1,527.0	1,267.0	$ 1,127.0
Forward loss recognition	1,913.0	1,681.0
Dividends payable		1,159.0
Taxes Payable	43.0	670.0
Other	4,453.0	4,298.0
Total	22,171.0	22,868.0
Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Operating Lease, Liability, Current	268.0	$ 252.0
Total Criminal Monetary Penalty and Beneficiary Compensation [Member]
Loss Contingencies [Line Items]
Deferred Prosecution Agreement Liability	$ 743.6