Segment and Revenue Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Segment Reporting Information [Line Items]
Assets	$ 164,787	$ 168,235
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Assets	94,254	91,837
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Assets	17,512	16,723
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Assets	15,595	16,026
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Assets	$ 37,426	$ 43,649