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Debt (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 0 Months Ended
Feb. 20, 2015
Debt Instrument [Line Items]  
Debt Instrument, Issuance Date Feb. 20, 2015
Debt Instrument, Face Amount $ 750us-gaap_DebtInstrumentFaceAmount
Proceeds from Debt, Net of Issuance Costs 722us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Two Point Five Percent due on March 1, 2035 [Member]  
Debt Instrument [Line Items]  
Debt Instrument, Face Amount 250us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ba_TwoPointFivePercentdueonMarch12025Member
Debt Instrument, Maturity Date Mar. 01, 2025
Debt Instrument, Interest Rate, Stated Percentage 2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ba_TwoPointFivePercentdueonMarch12025Member
Three Point Three Percent due on March 1, 2035 [Member]  
Debt Instrument [Line Items]  
Debt Instrument, Face Amount 250us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ba_ThreePointThreePercentdueonMarch12035Member
Debt Instrument, Maturity Date Mar. 01, 2035
Debt Instrument, Interest Rate, Stated Percentage 3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ba_ThreePointThreePercentdueonMarch12035Member
Three Point Five Percent due on March 1, 2045 [Member]  
Debt Instrument [Line Items]  
Debt Instrument, Face Amount $ 250us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ba_ThreePointFivePercentdueonMarch12045Member
Debt Instrument, Maturity Date Mar. 01, 2045
Debt Instrument, Interest Rate, Stated Percentage 3.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ba_ThreePointFivePercentdueonMarch12045Member