Summary Of Business Segment Data (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 15,217	$ 16,908
Loss from operations	(83)	(1,353)
Other income, net	190	112
Interest and debt expense	(679)	(262)
(Loss)/earnings before income taxes	(572)	(1,503)
Income tax benefit	11	862
Net loss	(561)	(641)
Less: net loss attributable to noncontrolling interest	(24)	(13)
Net loss attributable to Boeing Shareholders	(537)	(628)
Operating Segments
Segment Reporting Information [Line Items]
Loss from operations	11	(1,527)
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Revenues	4,269	6,205
Loss from operations	(856)	(2,068)
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Revenues	7,185	6,042
Loss from operations	405	(191)
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Revenues	3,749	4,628
Loss from operations	441	708
Operating Segments | Boeing Capital
Segment Reporting Information [Line Items]
Revenues	60	65
Loss from operations	21	24
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	(46)	(32)
Unallocated items, eliminations and other	(364)	(173)
FAS/CAS service cost adjustment	$ 270	$ 347