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Liabilities, Commitments and Contingencies - Schedule of 737 Max Customer Concessions and Other Considerations Liability (Details) - B-737 - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Customer Concession And Other Consideration Liability [Roll Forward] |  |
Beginning balance – January 1 | $ 641 | $ 1,327
Reductions for payments made | (135) | (767)
Reductions for concessions and other in-kind considerations | (66) | (256)
Changes in estimates | (5) | 510
Ending balance – September 30 | $ 435 | $ 814

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- Definition Accrual For Customer Concessions And Other Considerations Liability + References No definition available. + Details
Name: | ba_AccrualForCustomerConcessionsAndOtherConsiderationsLiability
Namespace Prefix: | ba_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Concessions And Other In-Kind Considerations To Customers + References No definition available. + Details
Name: | ba_ConcessionsAndOtherInKindConsiderationsToCustomers
Namespace Prefix: | ba_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Customer Concession And Other Consideration Liability + References No definition available. + Details
Name: | ba_CustomerConcessionAndOtherConsiderationLiabilityRollForward
Namespace Prefix: | ba_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Grounding Customer Concessions And Other Considerations Liability + References No definition available. + Details
Name: | ba_GroundingCustomerConcessionsAndOtherConsiderationsLiability
Namespace Prefix: | ba_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Payments Made To Customers + References No definition available. + Details
Name: | ba_PaymentsMadeToCustomers
Namespace Prefix: | ba_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ba_CommercialAircraftProgramsAxis=srt_B737Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |