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Liabilities, Commitments and Contingencies - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2025 USD ($) lot aircraft | Jun. 30, 2024 USD ($) | Mar. 31, 2024 USD ($) aircraft | Sep. 30, 2018 USD ($) aircraft | Jun. 30, 2025 USD ($) lot aircraft | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($) aircraft | Dec. 31, 2018 USD ($) aircraft simulator | Dec. 31, 2011 lot aircraft tanker
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Environmental loss contingency, operation and maintenance period, maximum |  |  |  |  | 30 years |  |  |  |
Loss contingency, range of possible loss, portion not accrued | $ 1,000 |  |  |  | $ 1,000 |  | $ 1,002 |  |
Contingent liabilities on outstanding letters of credit agreements and surety bonds | 2,976 |  |  |  | 2,976 |  | 2,991 |  |
Supplier finance program, obligation | 1,638 |  |  |  | 1,638 |  | 2,703 |  |
Increase (decrease) in earnings from operations due to change in accounting estimate | (187) | $ (1,334) |  |  | (338) | $ (1,700) |  |  |
Number of annual production lot | lot |  |  |  |  |  |  |  |  | 13
VC-25B |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contract value | $ 4,000 |  |  |  | $ 4,000 |  |  |  |
Number of commercial aircraft | aircraft | 2 |  |  |  | 2 |  |  |  |
Increase (decrease) in earnings from operations due to change in accounting estimate |  |  |  |  |  |  | (379) |  |
KC-46A Tanker |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contract value | $ 29,000 |  |  |  | $ 29,000 |  |  |  |
Increase (decrease) in earnings from operations due to change in accounting estimate |  |  |  |  |  |  | (2,002) |  |
Number of generation aerial refueling tanker | tanker |  |  |  |  |  |  |  |  | 4
Number of aircraft | aircraft | 154 |  |  |  | 154 |  |  |  | 179
Number of low rate initial production lot | lot | 11 |  |  |  | 11 |  |  |  |
MQ-25 |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Contract value |  |  |  | $ 890 |  |  |  |  |
Increase (decrease) in earnings from operations due to change in accounting estimate |  |  |  | $ (291) |  |  | $ (339) |  |
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 | 4 |  |  |  | 4 |  | 5 | 5 |
Number of simulator | simulator |  |  |  |  |  |  |  | 7 |
T-7A EMD and Production |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Increase (decrease) in earnings from operations due to change in accounting estimate |  |  |  |  |  |  | $ (1,770) |  |
Number of aircraft | aircraft | 342 |  |  |  | 342 |  |  |  |
Commercial Crew |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Increase (decrease) in earnings from operations due to change in accounting estimate |  |  |  |  |  |  | (523) |  |
Minimum | Supplier Finance Program, Majority of Amounts Payable |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Supplier finance program, payment timing, period | 30 days |  |  |  | 30 days |  |  |  |
Maximum | Supplier Finance Program, Majority of Amounts Payable |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Supplier finance program, payment timing, period | 90 days |  |  |  | 90 days |  |  |  |
Commercial Aircraft Commitments | Total Contractual Trade-In Commitment |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | $ 1,403 |  |  |  | $ 1,403 |  | 1,393 |  |
Commercial Aircraft Commitments | Net Amounts Payable to Customers Related to Probable Contractual Trade-In Commitments |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | 65 |  |  |  | 65 |  | 275 |  |
Commercial Aircraft Commitments | Fair Value of Trade in Value of Aircraft |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | 63 |  |  |  | 63 |  | 270 |  |
Financing Commitment |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | 16,586 |  |  |  | 16,586 |  | $ 17,124 |  |
Financing Commitment | External Credit Rating, Non Investment Grade |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | 13,260 |  |  |  | 13,260 |  |  |  |
Joint Venture |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Other commitment | $ 269 |  |  |  | $ 269 |  |  |  |
Other commitment, period | 8 years |  |  |  | 8 years |  |  |  |
2023 |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Changes in estimates |  |  |  |  | $ 95 |  |  |  |
Contingent on Customer Negotiations |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
737 MAX customer concessions and other considerations liability | $ 87 |  |  |  | 87 |  |  |  |
Alaska Airlines 737-9 Accident and 737-9 Grounding |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Revenue from contract with customer, excluding assessed tax |  |  | $ 443 |  |  |  |  |  |
Capitalized Precontract Costs | KC-46A Tanker |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | 93 |  |  |  | 93 |  |  |  |
Capitalized Precontract Costs | T-7A Production |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | 266 |  |  |  | 266 |  |  |  |
Capitalized Precontract Costs | Commercial Crew |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | 404 |  |  |  | 404 |  |  |  |
Potential Termination Liabilities | KC-46A Tanker |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | 245 |  |  |  | 245 |  |  |  |
Potential Termination Liabilities | T-7A Production |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | 742 |  |  |  | 742 |  |  |  |
Potential Termination Liabilities | Commercial Crew |  |  |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Capitalized precontract costs | $ 144 |  |  |  | $ 144 |  |  |  |

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