Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net earnings/(loss)	$ 2,238	$ (11,829)	$ (2,242)
Other comprehensive income/(loss), net of tax:
Currency translation adjustments	225	(44)	33
Reclassification of realized loss on foreign currency translation to Gain on dispositions, net	17
Unrealized gain on certain investments, net of tax of $0, $0 and $0			2
Derivative instruments:
Unrealized gain/(loss) arising during period, net of tax of ($10), $0 and ($11)	262	(258)	41
Reclassification adjustment for loss/(gain) included in net loss, net of tax of ($1), $0 and $1	37	35	(5)
Total unrealized gain/(loss) on derivative instruments, net of tax	299	(223)	36
Defined benefit pension plans & other postretirement benefits:
Net actuarial gain/(loss) arising during the period, net of tax of ($1), ($1) and $13	25	(225)	(722)
Amortization of actuarial loss/(gain) included in net periodic benefit cost, net of tax of ($9), $0 and $0	149	105	(2)
Amortization of prior service credits included in net periodic benefit cost, net of tax of $4, $0 and $1	(71)	(92)	(102)
Prior service credits arising during the period, net of tax of $0, $0 and $0	(6)	(140)
Pension and postretirement benefit related to our equity method investments, net of tax of $0, $0 and $0		9
Total defined benefit pension plans & other postretirement benefits, net of tax	97	(343)	(826)
Other comprehensive income/(loss), net of tax	638	(610)	(755)
Comprehensive income/(loss)	2,876	(12,439)	(2,997)
Comprehensive loss related to noncontrolling interests	3	(12)	(20)
Comprehensive income/(loss) attributable to Boeing Shareholders	$ 2,873	$ (12,427)	$ (2,977)