Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (31)	$ (355)
Other comprehensive loss, net of tax:
Currency translation adjustments	46	(35)
Derivative instruments:
Unrealized gains/(losses) arising during period, net of tax of ($20) and $19	68	(65)
Reclassification adjustment for losses included in net loss, net of tax of ($5) and ($2)	18	7
Total unrealized gain/(loss) on derivative instruments, net of tax	86	(58)
Defined benefit pension plans and other postretirement benefits:
Net actuarial loss arising during the period, net of tax of $0 and $17		(19)
Amortization of actuarial losses included in net periodic benefit cost, net of tax of $3 and ($12)	43	11
Amortization of prior service credits included in net periodic benefit cost, net of tax of ($1) and $12	(20)	(11)
Pension and postretirement cost related to our equity method investments, net of tax of $0 and ($3)		5
Total defined benefit pension plans and other postretirement benefits, net of tax	23	(14)
Other comprehensive income/(loss), net of tax	155	(107)
Comprehensive income/(loss)	124	(462)
Less: Comprehensive income/(loss) related to noncontrolling interest	6	(12)
Comprehensive income/(loss) attributable to Boeing Shareholders	$ 118	$ (450)