Segment and Revenue Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Segment Reporting Information [Line Items]
Assets	$ 150,023	$ 156,363
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Assets	78,678	84,177
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Assets	16,371	15,350
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Assets	17,338	16,704
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Assets	$ 37,636	$ 40,132