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Liabilities, Commitments And Contingencies (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2014
Liabilities Commitments And Contingencies [Line Items]        
Increase/(Decrease) in Earnings from operations due to change in accounting estimate. $ 100ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate. $ 242ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate. $ 379ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate.  
Amount by which estimated range of reasonably possible remediation costs exceeded recorded liabilities 874us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued 928us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued    
Contingent liabilities on outstanding letters of credit agreements and surety bonds 3,985us-gaap_LettersOfCreditOutstandingAmount 4,376us-gaap_LettersOfCreditOutstandingAmount    
Cash surrender value of life insurance policies 466us-gaap_CashSurrenderValueOfLifeInsurance 451us-gaap_CashSurrenderValueOfLifeInsurance    
Total value of loans against underlying life insurance policies 439ba_LoansTakenToCoverLifeInsurancePolicy 425ba_LoansTakenToCoverLifeInsurancePolicy    
C-17 Program [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Number Unsold Aircraft 7ba_NumberUnsoldAircraft
/ us-gaap_AircraftTypeAxis
= ba_C17ProgramMember
     
C-17 Program [Member] | Inventory Expenditures And Termination Liabilities [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Inventory Write-down 48us-gaap_InventoryWriteDown
/ us-gaap_AircraftTypeAxis
= ba_C17ProgramMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= ba_InventoryExpendituresAndTerminationLiabilitiesMember
     
C-17 Program [Member] | Capitalized Precontract Costs [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Loss contingency, estimate of possible loss 1,091us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_AircraftTypeAxis
= ba_C17ProgramMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= ba_CapitalizedPrecontractCostsMember
     
C-17 Program [Member] | Potential Termination Liabilities [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Loss contingency, estimate of possible loss 385us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_AircraftTypeAxis
= ba_C17ProgramMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= ba_PotentialTerminationLiabilitiesMember
     
F-18 Program [Member] | U.S. Navy [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Number Of Aircraft Included Within Backlog 68ba_NumberOfAircraftIncludedWithinBacklog
/ us-gaap_AircraftTypeAxis
= ba_F18ProgramMember
/ ba_BacklogOrdersAxis
= ba_U.S.NavyMember
     
Number Of Aircraft Funded in US Government Budget 15ba_NumberOfAircraftFundedinUSGovernmentBudget
/ us-gaap_AircraftTypeAxis
= ba_F18ProgramMember
/ ba_BacklogOrdersAxis
= ba_U.S.NavyMember
     
Commercial Aircraft Commitments [Member] | Total Contractual Trade In Value Maximum [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 2,392us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_TotalcontractualtradeinvaluemaximumMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
1,605us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_TotalcontractualtradeinvaluemaximumMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
   
Commercial Aircraft Commitments [Member] | Net amounts payable to customers related to probable contractual trade-in commitments [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 446us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_NetAmountsPayableToCustomersRelatedToProbableContractualTradeInCommitmentsMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
325us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_NetAmountsPayableToCustomersRelatedToProbableContractualTradeInCommitmentsMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
   
Commercial Aircraft Commitments [Member] | Probable Contractual Trade In Value [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 446us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_ProbablecontractualtradeinvalueMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
325us-gaap_OtherCommitment
/ ba_CommercialAircraftCommitmentsAxis
= ba_ProbablecontractualtradeinvalueMember
/ ba_CommitmentTypeAxis
= ba_CommercialAircraftCommitmentsMember
   
Financing Commitment [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 16,723us-gaap_OtherCommitment
/ ba_CommitmentTypeAxis
= ba_FinancingCommitmentMember
17,987us-gaap_OtherCommitment
/ ba_CommitmentTypeAxis
= ba_FinancingCommitmentMember
   
Financing Commitment [Member] | External Credit Rating, Non Investment Grade [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 16,723us-gaap_OtherCommitment
/ ba_CommitmentTypeAxis
= ba_FinancingCommitmentMember
/ us-gaap_ExternalCreditRatingByGroupingAxis
= us-gaap_ExternalCreditRatingNonInvestmentGradeMember
     
ULA Additional Capital Commitment [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Other Commitment 527us-gaap_OtherCommitment
/ ba_CommitmentTypeAxis
= ba_UlaAdditionalCapitalCommitmentMember
     
Minimum [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Trade-In Commitment Expiration Date 2015      
Maximum [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Trade-In Commitment Expiration Date 2026      
Commercial Airplanes Segment [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.       (238)ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate.
/ us-gaap_StatementBusinessSegmentsAxis
= ba_CommercialAirplanesSegmentMember
Defense, Space & Security Segment [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.       (187)ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate.
/ us-gaap_StatementBusinessSegmentsAxis
= ba_BoeingDefenseSpaceSecuritySegmentMember
KC-46A Tanker [Member]        
Liabilities Commitments And Contingencies [Line Items]        
Increase/(Decrease) in Earnings from operations due to change in accounting estimate.       $ (425)ba_IncreaseDecreaseinEarningsfromoperationsduetochangeinaccountingestimate.
/ ba_ProgramAxis
= ba_KC46ATankerMember