Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 146,846	$ 152,136
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Assets	78,906	77,973
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Assets	15,748	14,256
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Assets	16,839	17,399
Operating Segments | Boeing Capital
Segment Reporting Information [Line Items]
Assets	1,797	1,978
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Assets	$ 33,556	$ 40,530