Summary Of Business Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 14,139	$ 19,980	$ 42,854	$ 58,648
(Loss)/earnings from operations	(401)	1,259	(4,718)	229
Other income, net	119	121	325	334
Interest and debt expense	(643)	(203)	(1,458)	(480)
(Loss)/earnings before income taxes	(925)	1,177	(5,851)	83
Income tax benefit/(expense)	459	(10)	2,349	291
Net (loss)/earnings	(466)	1,167	(3,502)	374
Less: net loss attributable to noncontrolling interest	(17)		(49)
Net (loss)/earnings attributable to Boeing Shareholders	(449)	1,167	(3,453)	374
Operating Segments
Segment Reporting Information [Line Items]
(Loss)/earnings from operations	(440)	1,416	(4,808)	867
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Revenues	3,596	8,249	11,434	24,793
(Loss)/earnings from operations	(1,369)	(40)	(6,199)	(3,813)
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Revenues	6,848	7,002	19,478	20,168
(Loss)/earnings from operations	628	754	1,037	2,581
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Revenues	3,694	4,658	11,810	13,820
(Loss)/earnings from operations	271	673	307	2,013
Operating Segments | Boeing Capital
Segment Reporting Information [Line Items]
Revenues	71	66	205	207
(Loss)/earnings from operations	30	29	47	86
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	(70)	5	(73)	(340)
Unallocated items, eliminations and other	(314)	(521)	(965)	(1,731)
FAS/CAS service cost adjustment	$ 353	$ 364	$ 1,055	$ 1,093