Segment and Revenue Information (Reconciliation of Assets from Segment to Consolidated) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 152,136	$ 133,625
Operating Segments [Member] | Commercial Airplanes
Segment Reporting Information [Line Items]
Assets	77,973	73,995
Operating Segments [Member] | Defense, Space & Security
Segment Reporting Information [Line Items]
Assets	14,256	15,757
Operating Segments [Member] | Global Services
Segment Reporting Information [Line Items]
Assets	17,399	18,605
Operating Segments [Member] | Boeing Capital Corporation
Segment Reporting Information [Line Items]
Assets	1,978	2,269
Corporate Reconciling Items And Eliminations [Member]
Segment Reporting Information [Line Items]
Assets	$ 40,530	$ 22,999