Financing Receivables and Operating Lease Equipment - Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
737 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	$ 191	$ 45
777 Aircraft
Financing Receivables and Operating Lease Equipment [Line Items]
Gross customer financing	$ 167	$ 170

The aggregate sum of financing receivables from investments in sales-type/finance leases, notes and operating lease equipment, at cost less accumulated depreciation, before the allowance for losses on the receivables.

No definition available.

Name:	ba_GrossCustomerFinancingAssets
Namespace Prefix:	ba_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant