Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss)/earnings	$ (466)	$ 1,167	$ (3,502)	$ 374
Currency translation adjustments	48	(59)	15	(61)
Unrealized gain on certain investments, net of tax of $0, $0, $0 and $0				1
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax				0
Unrealized (loss)/gain on derivative instruments [Abstract]
Unrealized (loss)/gain arising during period, net of tax of $31, $30, ($23) and $25	79	(89)	(107)	(106)
Unrealized loss arising during period, tax	(23)	25	31	30
Reclassification adjustment for losses/(gains) included in net (loss)/earnings, net of tax of ($6), ($6), ($2) and ($7)	8	25	20	22
Reclassification adjustment for losses included in net earnings, tax	(2)	(7)	(6)	(6)
Total unrealized (loss)/gain on derivative instruments, net of tax	87	(64)	(87)	(84)
Defined benefit pension plans & other postretirement benefits [Abstract]
Prior service credit arising during the period, net of tax of ($4), $0, ($4) and $0	13		13
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax	(4)		(4)
Amortization of prior service credits included in net periodic pension cost, net of tax of $22, $18, $10 and $5	(22)	(22)	(67)	(67)
Amortization of prior service cost included in net periodic pension cost, tax	10	5	22	18
Net actuarial loss arising during the period, net of tax of $19, $0, $16 and $0	(53)		(65)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	16		19
Amortization of actuarial losses included in net periodic pension cost, net of tax of ($179), ($97), ($76) and ($32)	172	117	562	350
Amortization of actuarial losses included in net periodic pension cost, tax	(76)	(32)	(179)	(97)
Settlements and curtailments included in net loss, net of tax of ($1), $0, $0 and $0	1		3
Other Comprehensive Income, Settlements and curtailments included in net income, tax	0		(1)
Pension and postretirement cost related to our equity method investments, net of tax of $0, ($5), $0, and ($3)		9		17
Pension and post retirement benefits related to our equity method investments, tax		(3)		(5)
Total defined benefit pension plans and other postretirement benefits, net of tax	111	104	446	300
Other comprehensive income, net of tax	246	(19)	374	156
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	(17)	(15)	(49)	(22)
Comprehensive (loss)/income, net of tax	(220)	1,133	(3,128)	508
Comprehensive (loss)/income attributable to Boeing Shareholders, net of tax	$ (203)	$ 1,148	$ (3,079)	$ 530