Summary Of Business Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 16,998	$ 11,807	$ 32,215	$ 28,715
Earnings/(loss) from operations	1,023	(2,964)	940	(4,317)
Other income, net	199	94	389	206
Interest and debt expense	(673)	(553)	(1,352)	(815)
(Loss)/earnings before income taxes	549	(3,423)	(23)	(4,926)
Income tax benefit	18	1,028	29	1,890
Net earnings/(loss)	567	(2,395)	6	(3,036)
Less: net loss attributable to noncontrolling interest	(20)	(19)	(44)	(32)
Net loss attributable to Boeing Shareholders	587	(2,376)	50	(3,004)
Operating Segments
Segment Reporting Information [Line Items]
Earnings/(loss) from operations	1,053	(2,841)	1,064	(4,368)
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Revenues	6,015	1,633	10,284	7,838
Earnings/(loss) from operations	(472)	(2,762)	(1,328)	(4,830)
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Revenues	6,876	6,588	14,061	12,630
Earnings/(loss) from operations	958	600	1,363	409
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Revenues	4,067	3,488	7,816	8,116
Earnings/(loss) from operations	531	(672)	972	36
Operating Segments | Boeing Capital
Segment Reporting Information [Line Items]
Revenues	78	69	138	134
Earnings/(loss) from operations	36	(7)	57	17
Corporate Reconciling Items And Eliminations
Segment Reporting Information [Line Items]
Revenues	(38)	29	(84)	(3)
Unallocated items, eliminations and other	(298)	(478)	(662)	(651)
FAS/CAS service cost adjustment	$ 268	$ 355	$ 538	$ 702