DESCRIPTION OF PLAN - Narrative (Details) - EBP 002		12 Months Ended
Jan. 01, 2026 year	Dec. 31, 2025 USD ($) loan year
EBP, Description of Plan [Line Items]
Participant withdrawal, minimum attainment age		59 years 6 months
Employee contribution age		50
Note receivable from participant, account, minimum borrowing, amount \| $		$ 1,000
Note receivable from participant, account, maximum borrowing, amount \| $		$ 50,000
Note receivable from participant, account, maximum borrowing, to total account, percentage		50.00%
Note receivable from participant, account, borrowing term		12 months
Note receivable from participant, account, maximum loans outstanding \| loan		2
Minimum
EBP, Description of Plan [Line Items]
Asset held for investment, participant loan, interest rate		3.25%
Minimum \| Subsequent Event
EBP, Description of Plan [Line Items]
Employer catch-up contribution age	60
Maximum
EBP, Description of Plan [Line Items]
Asset held for investment, participant loan, interest rate		9.50%
Maximum \| Subsequent Event
EBP, Description of Plan [Line Items]
Employer catch-up contribution age	63

EBP, Employee Contribution Age

No definition available.

Name:	ba_EBPEmployeeContributionAge
Namespace Prefix:	ba_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Employer Catch-up Contribution Age

+ References

No definition available.

+ Details

Name:	ba_EBPEmployerCatchUpContributionAge
Namespace Prefix:	ba_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Account, Maximum Loans Outstanding

+ References

No definition available.

+ Details

Name:	ba_EBPNoteReceivableFromParticipantAccountMaximumLoansOutstanding
Namespace Prefix:	ba_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

EBP, Note Receivable From Participant, Account, Outstanding Loan Reduction Duration

+ References

No definition available.

+ Details

Name:	ba_EBPNoteReceivableFromParticipantAccountOutstandingLoanReductionDuration
Namespace Prefix:	ba_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Withdrawal, Minimum Attainment Age

+ References

No definition available.

+ Details

Name:	ba_EBPParticipantWithdrawalMinimumAttainmentAge
Namespace Prefix:	ba_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=ba_EBP002Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: