Segment and Revenue Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Assets	$ 168,235	$ 156,363
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Assets	91,837	84,177
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Assets	16,723	15,350
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Assets	16,026	16,704
Other
Segment Reporting Information [Line Items]
Assets	$ 43,649	$ 40,132