Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Commitments And Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Portion Not Accrued	$ 1,088			$ 1,088		$ 1,077
Letters of Credit Outstanding, Amount	3,761			3,761		3,769
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate	90		$ 28	(749)	$ 175
737 MAX customer concessions and other considerations liability						7,389
Severance Costs	652
Base U.S. National Defense Spending	740,500			740,500
Contingent On Customer Negotiations
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	3,600			3,600
Lower Customer Delivery Payments
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	1,900			1,900
Cash Payments To Customers
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	1,100			1,100
Customer Concessions
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	100			100
Employee Severance
Commitments And Contingencies [Line Items]
Accrued Liabilities	405			405
Within Current fiscal Year [Member]
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	400			400
Within Next fiscal Year [Member]
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	500			500
Financing Commitment
Commitments And Contingencies [Line Items]
Other Commitment	12,784			12,784		13,377
Joint venture
Commitments And Contingencies [Line Items]
Other Commitment	243			243
Total Contractual Trade-In Commitment | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other Commitment	1,165			1,165		1,407
Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other Commitment	621			621		711
Fair Value of Trade In Value of Aircraft | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other Commitment	602			602		678
KC-46A Tanker
Commitments And Contingencies [Line Items]
Contract Value	15,000			15,000
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate				978
KC-46A Tanker | Capitalized Precontract Costs
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	374			374
KC-46A Tanker | Potential Termination Liabilities
Commitments And Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	548			548
KC-46A Tanker Remote Vision System
Commitments And Contingencies [Line Items]
Increase/(Decrease) in (Loss)/earnings from operations due to change in accounting estimate		$ 551
B-737
Commitments And Contingencies [Line Items]
Additional expenses as a result of the 737 MAX grounding				121
Aircraft Program Costs, Increase						6,300
Abnormal Production cost.	712			1,509
737 MAX customer concessions and other considerations liability	$ 6,664			6,664
B-737 | Within Next Two fiscal Years
Commitments And Contingencies [Line Items]
Abnormal Production cost.				$ 5,000
B737NG Structure (Picklefork)
Commitments And Contingencies [Line Items]
Cost of Goods and Services Sold		$ 336				$ 135