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Liabilities, Commitments and Contingencies - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 USD ($) aircraft lot | Mar. 31, 2023 USD ($) | Sep. 30, 2018 USD ($) aircraft | Dec. 31, 2023 USD ($) | Dec. 31, 2018 USD ($) aircraft simulator lot | Dec. 31, 2011 aircraft lot tanker
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Loss contingency, range of possible loss, portion not accrued | $ 971 |  |  | $ 1,030 |  |
Contingent liabilities on outstanding letters of credit agreements and surety bonds | 4,480 |  |  | 4,548 |  |
Supplier finance program, obligation | 2,500 |  |  | 2,900 |  |
Increase to Loss from operations | (366) | $ (518) |  |  |  |
Number of annual production lot | lot |  |  |  |  |  | 13
Alaska Airlines 737-9 Accident and 737-9 Grounding |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax | 443 |  |  |  |  |
VC-25B |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contract value | $ 4,000 |  |  |  |  |
Number of commercial aircraft | aircraft | 2 |  |  |  |  |
Increase to Loss from operations |  |  |  | (482) |  |
KC-46A Tanker |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contract value | $ 27,000 |  |  |  |  |
Increase to Loss from operations | $ (128) |  |  | (309) |  |
Number of generation aerial refueling tanker | tanker |  |  |  |  |  | 4
Number of aircraft | aircraft | 139 |  |  |  |  | 179
Number of low rate initial production lot | lot | 10 |  |  |  |  |
KC-46A Tanker | Capitalized Precontract Costs |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | $ 130 |  |  |  |  |
KC-46A Tanker | Potential Termination Liabilities |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | 214 |  |  |  |  |
MQ-25 |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contract value |  |  | $ 890 |  |  |
Increase to Loss from operations |  |  | $ 291 | (231) |  |
Number of aircraft | aircraft |  |  | 7 |  |  |
Cost-type contract modification, awarded amount | $ 657 |  |  |  |  |
Number of additional test aircraft | aircraft | 2 |  |  |  |  |
T-7A EMD |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Contract value |  |  |  |  | $ 860 |
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] |  |  |  |  |  |
Number of annual production lot | lot |  |  |  |  | 11 |
T-7A Production | Capitalized Precontract Costs |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | $ 235 |  |  |  |  |
T-7A Production | Potential Termination Liabilities |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | 305 |  |  |  |  |
Commercial Crew |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Increase to Loss from operations |  |  |  | (288) |  |
Commercial Crew | Capitalized Precontract Costs |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | 229 |  |  |  |  |
Commercial Crew | Potential Termination Liabilities |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Capitalized precontract costs | 158 |  |  |  |  |
T-7A EMD and Production |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Increase to Loss from operations | $ (94) |  |  | (275) |  |
Minimum | Supplier Finance Program, Majority of Amounts Payable |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Supplier finance program, payment timing, period | 30 days |  |  |  |  |
Maximum |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Supplier finance program, payment timing, period | 12 months |  |  |  |  |
Maximum | Supplier Finance Program, Majority of Amounts Payable |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Supplier finance program, payment timing, period | 90 days |  |  |  |  |
Financing Commitment |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | $ 17,008 |  |  | 17,003 |  |
Financing Commitment | External Credit Rating, Non Investment Grade |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | 13,682 |  |  |  |  |
Joint Venture |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | $ 262 |  |  |  |  |
Other commitment, period | 9 years |  |  |  |  |
Total Contractual Trade-In Commitment | Commercial Aircraft Commitments |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | $ 1,426 |  |  | 1,415 |  |
Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments | Commercial Aircraft Commitments |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | 311 |  |  | 407 |  |
Fair Value of Trade in Value of Aircraft | Commercial Aircraft Commitments |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Other commitment | 311 |  |  | $ 407 |  |
2023 |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
Changes in estimates | 332 |  |  |  |  |
Contingent on Customer Negotiations |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |
737 MAX customer concessions and other considerations liability | $ 430 |  |  |  |  |

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