Summary of Business Segment Data - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 89,463	$ 66,517	$ 77,794
Earnings/(loss) from operations	4,281	(10,707)	(773)
Other income, net	1,125	1,222	1,227
Interest and debt expense	(2,771)	(2,725)	(2,459)
Earnings/(loss) before income taxes	2,635	(12,210)	(2,005)
Income tax (expense)/benefit	(397)	381	(237)
Net earnings/(loss)	2,238	(11,829)	(2,242)
Less: Net earnings/(loss) attributable to noncontrolling interest	3	(12)	(20)
Net earnings/(loss) attributable to Boeing shareholders	2,235	(11,817)	(2,222)
Less: Mandatory convertible preferred stock dividends accumulated during the period	345	58
Net earnings/(loss) attributable to Boeing common shareholders	1,890	(11,875)	(2,222)
Net earnings/(loss) attributable to Boeing common shareholders	1,890	(11,875)	(2,222)
Operating Segments
Segment Reporting Information [Line Items]
Earnings/(loss) from operations	6,267	(9,764)	(70)
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Total revenues	41,494	22,861	33,901
Earnings/(loss) from operations	(7,079)	(7,969)	(1,635)
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Total revenues	27,234	23,918	24,933
Earnings/(loss) from operations	(128)	(5,413)	(1,764)
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Total revenues	20,923	19,954	19,127
Earnings/(loss) from operations	13,474	3,618	3,329
Other
Segment Reporting Information [Line Items]
Total revenues	(188)	(216)	(167)
Unallocated items, eliminations and other	3,031	2,047	1,759
FAS/CAS service cost adjustment	$ (1,045)	$ (1,104)	$ (1,056)