Liabilities, Commitments and Contingencies - Narrative (Details) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) lot aircraft	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) lot aircraft	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2018 USD ($) aircraft lot simulator	Dec. 31, 2011 aircraft lot tanker
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	$ 1,500				$ 1,500
Loss contingency, range of possible loss, portion not accrued	1,017				1,017		$ 1,058
Contingent liabilities on outstanding letters of credit agreements and surety bonds	4,420				4,420		5,070
Supplier finance program, obligation	2,900				2,900		2,500
Increase to Loss from operations	$ 1,252			$ 2,424	$ 2,600	$ 3,965
Number of annual production lot | lot									13
Minimum | Supplier Finance Program, Majority of Amounts Payable
Commitments And Contingencies [Line Items]
Supplier finance program, payment timing, period	30 days				30 days
Maximum
Commitments And Contingencies [Line Items]
Supplier finance program, payment timing, period	12 months				12 months
Maximum | Supplier Finance Program, Majority of Amounts Payable
Commitments And Contingencies [Line Items]
Supplier finance program, payment timing, period	90 days				90 days
VC-25B
Commitments And Contingencies [Line Items]
Contract value	$ 4,300				$ 4,300
Number of commercial aircraft | aircraft	2				2
Increase to Loss from operations	$ 482						1,452
KC-46A Tanker
Commitments And Contingencies [Line Items]
Contract value	$ 24,000				$ 24,000
Increase to Loss from operations			$ 245				1,374
Number of generation aerial refueling tanker | tanker									4
Number of aircraft | aircraft	124				124				179
Number of low rate initial production lot | lot	9				9
KC-46A Tanker | Capitalized Precontract Costs
Commitments And Contingencies [Line Items]
Capitalized precontract costs	$ 160				$ 160
KC-46A Tanker | Potential Termination Liabilities
Commitments And Contingencies [Line Items]
Capitalized precontract costs	150				150
MQ-25
Commitments And Contingencies [Line Items]
Contract value								$ 890
Increase to Loss from operations	71	$ 68					579
Number of aircraft | aircraft								7
T-7A EMD
Commitments And Contingencies [Line Items]
Contract value								$ 860
Increase to Loss from operations							203
Number of aircraft | aircraft								5
Number of simulator | simulator								7
Services probable of being exercised, number of aircrafts | aircraft								346
T-7A Production
Commitments And Contingencies [Line Items]
Increase to Loss from operations		$ 189					552
Number of annual production lot | lot								11
T-7A Production | Capitalized Precontract Costs
Commitments And Contingencies [Line Items]
Capitalized precontract costs	162				162
T-7A Production | Potential Termination Liabilities
Commitments And Contingencies [Line Items]
Capitalized precontract costs	421				421
Commercial Crew
Commitments And Contingencies [Line Items]
Increase to Loss from operations	257						288
Commercial Crew | Capitalized Precontract Costs
Commitments And Contingencies [Line Items]
Capitalized precontract costs	191				191
Commercial Crew | Potential Termination Liabilities
Commitments And Contingencies [Line Items]
Capitalized precontract costs	196				196
Financing Commitment
Commitments And Contingencies [Line Items]
Other commitment	16,499				16,499		16,105
Joint Venture
Commitments And Contingencies [Line Items]
Other commitment	$ 274				$ 274
Other commitment, period	5 years				5 years
Total Contractual Trade-In Commitment | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other commitment	$ 1,430				$ 1,430		1,117
Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other commitment	360				360		286
Fair Value of Trade in Value of Aircraft | Commercial Aircraft Commitments
Commitments And Contingencies [Line Items]
Other commitment	360				360		$ 286
2023
Commitments And Contingencies [Line Items]
Changes in estimates					300
Future Years
Commitments And Contingencies [Line Items]
Changes in estimates					400
Contracted Customer Concessions & Other Considerations Liability
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	1,400				1,400
Contingent on Customer Negotiations
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	100				100
Lower Customer Delivery Payments
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	600				600
Cash Payments to Customers
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	700				700
Customer Concessions
Commitments And Contingencies [Line Items]
737 MAX customer concessions and other considerations liability	$ 100				$ 100